Conquer Mold: Top Prevention Products for a Healthier Home
Mold can affect your health, damage surfaces, and lower the value of your property, so knowing which products actually work matters when you want a healthier living space.
Whether you’re checking from the cellar to the roof or just trying to keep a single closet fresh, the right products help you stop problems early, clear stains fast, and reduce recurring growth.
This review presents six well-reviewed, purpose-driven options so you can pick the one that fits your space, budget, and comfort level.
Top Picks
| Category | Product | Price | Score |
|---|---|---|---|
| 🏆 Fastest Acting | RMR-86 | $15.99 | 88/100 |
| 🎯 Best for Seals | ACTIVE Gel | $19.95 | 82/100 |
| 🔬 Best Test Kit | Kayenqo Kit | $28.99 | 94/100 |
| 🌬️ Best Purifier | Afloia Purifier | $69.99 | 91/100 |
| 🔰 Best Preventative Primer | Zinsser Primer | $17.81 | 90/100 |
| 💧 Best Moisture Control | DampRid Hanging | $16.49 | 95/100 |
How We Picked These Products
You want solutions that actually reduce mold risk and fit how you live, so we evaluated items on: proven effectiveness (how quickly and thoroughly a product removes or prevents mold), safety and ventilation needs (some cleaners are powerful and need PPE and airflow), ease of use (gel for tight seals, sprays for large areas, hanging packets for closets), coverage and longevity (how long a primer or moisture absorber protects), value for money, and testing capability (kits that let you know where problems start).
We also considered real-world signals like reviewer feedback on odors, packaging reliability and the typical scenarios you face — from damp closets and washer seals to whole-room air quality and the chance of leaks from cellar to roof.
You’ll find this spray is one of those go-to cleaners that actually do what they promise: spray, wait, and stains fade fast.
It’s excellent for quick bathroom touch-ups or tackling old stains on trim, siding, and decks — basically from the cellar to the roof — though you’ll want good ventilation.
It works on painted wood, tile grout, vinyl siding, and concrete; for bigger restoration jobs, you may repeat applications and use PPE.
If you want something that cuts through mildew without a ton of elbow grease, this is worth keeping under the sink.
What People Say
You’ll notice most customers praise how quickly the mold and mildew stains disappear and how little scrubbing is needed. People often mention it’s powerful and effective on bathroom trim and outdoor siding.
At the same time, a recurring note is the strong chlorine smell and the recommendation to ventilate and use basic PPE.
Some users also report occasional spray-bottle issues, but overall, the consensus is that it gets the job done.
Overall Sentiment: Positive
Situational Benefits
| Situation | How It Helps |
|---|---|
| Bathroom grout and caulk | Spray on stained areas, wait about 15 minutes and watch grout and caulk lighten without aggressive scrubbing. |
| Window casings and trim | Great for targeted touch-ups; you can even apply with a brush for precise control on delicate trim. |
| Decks and vinyl siding | Cuts through mildew and algae staining so surfaces look refreshed with minimal effort. |
| Heavy-duty restoration | For larger or deeply embedded stains, you can repeat applications and let the product keep working over several hours. |
Health Benefits
| Benefit | Description |
|---|---|
| Reduces visible mold | Removes the staining and surface growth that can trigger allergic reactions, improving visual cleanliness. |
| Lowers allergen exposure | By tackling mold growth on common household surfaces, it helps reduce spores and the allergens they release. |
| Quick action limits spread. | A fast-acting formula can stop small patches from worsening, so you can address problems before they grow. |
Versatility
You can use it for quick spot-cleaning in everyday rooms and for heavier jobs during seasonal maintenance.
It’s handy from the cellar to the roof — bathrooms, window casings, siding, and concrete all respond well, though very porous materials may need repeat treatments.
Safety Features
Contains sodium hypochlorite (a bleach-based ingredient); use in well-ventilated areas, wear gloves and eye protection, and avoid mixing with acids or ammonia.
Keep away from children and pets.
Problem Solving
Very effective at removing visible mold and mildew stains without scrubbing; best for spot treatments and moderate infestations.
It may take multiple applications on deeply embedded stains or very porous surfaces.
Eco Friendliness
Not the most eco-friendly option — it’s bleach-based and produces strong fumes. Use sparingly, ventilate well, and follow local disposal guidelines for chemical cleaners.
Key Benefits
- Fast-acting formula removes stains in seconds
- No scrubbing required for many surfaces
- Works on a variety of materials — tile, wood, siding, and concrete
- Ready-to-use spray for quick spot treatment
Current Price: $15.99
Rating: 4.4 (total: 64208+)
You’ll find this gel works differently than a spray — it clings where you need it, so you can treat gasket creases and vertical grout lines without everything running away.
It’s excellent for routine touch-ups around the washer seal, shower caulk, and grout, as well as for appliances like fridge seals; the concentrated bottle can stretch through seasonal cleanings.
Apply a generous layer, let it sit (longer on stubborn spots), and wipe clean.
If you want a targeted solution that’s low on scent and easy to store under the sink, this is worth keeping on hand for jobs from the cellar to roof.
What People Say
Most customers say the gel removes visible mold stains effectively and appreciate that it won’t run down walls like a spray, making it ideal for washer gaskets and grout lines.
People often note the mild scent and the product’s concentrated nature, while a common gripe is the need for repeat applications for deeply embedded stains or thicker buildup.
A few users mention a fiddly application on small cracks, but the consensus is that it’s effective for targeted jobs.
Overall Sentiment: Positive
Situational Benefits
| Situation | How It Helps |
|---|---|
| Front-load washer gasket | Apply directly into folds and let the gel sit so it loosens mold and grime that collect in the seal without dripping into the drum. |
| Bathroom grout and caulk | The thick formula clings to vertical grout lines and caulking, giving the active ingredients time to break down stains with minimal scrubbing. |
| Refrigerator and appliance seals | Use it on door seals and rubber gaskets to remove dark mildew marks that can trap odors and food residue. |
| Stubborn tub or tile stains | For older discoloration, apply a thicker layer and allow an extended dwell time, or repeat treatments, to lift set-in stains. |
Health Benefits
| Benefit | Description |
|---|---|
| Reduces visible mold | Removes surface mold and mildew that contribute to musty odors and unsightly stains, improving visual cleanliness. |
| Helps lower allergen sources | By tackling mold on common touchpoints and seals, it can reduce the amount of spores released into the home environment. |
| Limits spread when used early. | Treating small patches promptly can prevent growth from worsening and make follow-up maintenance easier. |
Versatility
This gel is handy for everyday spot-cleaning and seasonal deep-cleaning — from washer seals and shower caulk to appliance gaskets and grout.
It’s most useful when a clingy formula is needed so that you can work on vertical surfaces without a mess.
Safety
Formulated to be low-odor and mineral-based, but still treated as a chemical cleaner: wear gloves, avoid contact with eyes, ventilate the area, and follow the label.
Keep away from children and pets, and test on a small, inconspicuous area first.
Problem Solving
Very effective at removing surface-level mold and mildew stains, especially in tight crevices where sprays fail.
Stubborn, deeply set stains may require thicker application or repeat treatments, but for spot repairs and maintenance, it solves most visible issues.
Eco Friendliness
The product is marketed as mineral-based and fragrance-free, which is a plus compared with heavily scented, bleach-heavy cleaners.
Still, it’s a concentrated chemical solution, so use sparingly and follow disposal recommendations.
Key Benefits
- Thick gel formula stays in place for vertical surfaces
- Designed for front-load washer seals, grout, caulk, and appliance gaskets
- Gentle, low odor compared with strong bleach cleaners
- Concentrated bottle — lasts through multiple treatments
Current Price: $19.95
Rating: 4.1 (total: 19809+)
If you want a straightforward way to check for mold around the house, this kit makes it easy to play detective.
You get 12 plates (two packs of six), swabs, gloves, and a photo guide, and the company will help identify what’s growing from pictures — handy if you’re unsure.
Use it for quick checks after spills, when you suspect a musty smell, or as part of seasonal upkeep; it’s the sort of thing you’ll pull out from the celler to roof.
For routine monitoring or a one-off investigation before moving or after a leak, it’s a practical, budget-friendly first step I’d recommend keeping on hand.
What People Say
Buyers frequently praise how simple the kit is to use and the value of getting multiple plates for testing different rooms.
People mention the clear guide and quick customer support for identifying molds from photos, while a few note that incubation timing and warm placement can be fiddly for beginners.
Overall Sentiment: Positive
Situational Benefits
| Situation | How It Helps |
|---|---|
| HVAC System | You can swab vents or use an air plate to check if your ductwork is spreading spores so you know whether to call a pro for a deeper clean. |
| Indoor Air / Basements | Set a plate to sample the air in musty rooms or basements — it’s an easy way to confirm suspicious odors and decide on ventilation or dehumidifying steps. |
| Wood Furniture & Cabinets | Test behind wardrobes, kitchen cabinets, or under beds where damp can hide; the guide helps you spot common household molds so you can target cleanup. |
| Cars, RVs and Campers | Use a plate in vehicles or RVs to check damp upholstery and hidden corners after trips or leaks, and plan cleaning before mold spreads. |
Health Benefits
| Benefit | Description |
|---|---|
| Detects potential allergen sources | Finding mold early helps you act before spores increase and contribute to respiratory or allergy symptoms. |
| Supports targeted remediation | Knowing where and what type of mold is present lets you focus on cleaning or repairs rather than treating whole rooms blindly. |
| Gives peace of mind | Confirming low or no growth can reduce worry and help you track whether interventions are working over time. |
Versatility
This kit is helpful for quick spot checks and for more deliberate investigations after leaks, seasonal damp periods, or before moving into a new place.
It covers air sampling, HVAC checks, and surface swabs so that you can use it across rooms, vehicles, and storage spaces.
Safety
The kit includes gloves and clear handling instructions; still, treat plates as biological samples — wear gloves, avoid touching cultures, keep plates sealed in bags after incubation, and follow disposal guidance.
Keep out of reach of children and pets.
Problem Solving
This kit helps you confirm whether mold is present and, often, what kind it is, via photo-based lab ID, so you’re not guessing.
It’s a cost-effective way to decide whether DIY cleaning will work or if you need professional remediation.
Eco Friendliness
There are single-use plastic plates and packaging, so it’s not zero-waste, but the kit can reduce unnecessary professional visits by helping you confirm problems first.
Dispose of used plates according to the instructions, and retest only when needed.
Key Benefits
- Twelve test plates let you sample multiple spots or repeat checks
- Includes swabs, gloves, labels, and a visual mold identification guide
- Support for photo-based lab identification speeds up answers
- Works for HVAC systems, indoor air, vehicles, and physical surfaces
Current Price: $28.99
Rating: 4.6 (total: 2895+)
If you want cleaner air without fuss, this Afloia unit is the sort of appliance you’ll find handy from the celler to roof.
It’s built around a three-stage filter that traps pet dander, dust, pollen, and mold spores, and it can cycle air in rooms up to about 1,076 sq ft.
You can run it on ultra-quiet sleep mode (22 dB), set a 2/4/8-hour timer, or use the soft 7-color night light when you need atmosphere.
For everyday use—bedrooms, living rooms, or kitchens—and for special situations like post-leak airing or tackling pet odors before guests arrive, it’s a practical, easy-to-use option I’d recommend keeping on hand.
What People Say
People commonly note that the purifier makes a noticeable difference with pet dander and dust, and many appreciate how quiet it is on lower settings.
Customers also like the coverage and simple controls, while a minority mentions that the high setting can be loud and that odor-triggered responses feel inconsistent at times.
The replaceable filter options and easy setup are frequent pluses in user feedback.
Overall Sentiment: Positive
Situational Benefits
| Situation | How It Helps |
|---|---|
| Bedroom / Sleep | Run it on low overnight to reduce allergens and maintain gentle background noise so you wake up feeling less congested. |
| Homes with Pets | The pet-specific filter option and strong odor removal help reduce dander and lingering smells in living areas. |
| Basements & Post-Leak Cleanup | Use it after addressing a leak to help lower airborne mold spores and freshen musty spaces while you ventilate and dry materials. |
| Cooking / Smoke | Place it near the kitchen or an open-plan area to capture smoke and reduce lingering cooking odors faster than passive ventilation alone. |
Health Benefits
| Benefit | Description |
|---|---|
| Reduces airborne allergens | Capturing pet dander, pollen, and dust can lower triggers for sneezing, watery eyes, and daytime allergy symptoms. |
| May improve sleep quality | Cleaner air and quieter operation at night can help reduce nighttime congestion and interrupted sleep. |
| Helps limit mold spore exposure | While not a substitute for remediation, filtering airborne spores can reduce the immediate load after disturbances like roof leaks. |
Versatility
This purifier works as a daily air cleaner in bedrooms, living rooms, or kitchens and steps up for special situations like post-water-damage airing or pet-heavy homes.
The timer, multiple speeds, and color night light make it adaptable to different rooms and moods.
Safety
CARB certification for emissions, upward airflow design to avoid direct drafts, and clear filter-replacement guidance.
Keep the unit dry, don’t block intake or outlet vents, and follow the manual for safe filter handling.
Problem Solving
It helps you reduce airborne allergens, cut down odors, and lower mold spore counts in the short term — useful.
At the same time, you ventilate, dry out damp areas, or decide whether professional remediation is needed.
Eco Friendliness
The unit uses about 23 watts, which is modest for continuous use, but filters are single-use and need replacing every 4–6 months, depending on conditions.
Choosing the right replacement filter and not running at maximum unnecessarily helps limit waste and energy use.
Key Benefits
- Covers large areas — rated for up to 1,076 sq ft for fast whole-room cleaning
- 3-stage filtration targets allergens, smoke, odors, and mold spores
- Very quiet at low settings (around 22 dB), so it won’t disturb sleep
- Adjustable timers and fan speeds with a subtle 7-color night light
- Multiple replacement filter options (Original, Pet Allergy, Antibacterial)
Current Price: $69.99
Rating: 4.5 (total: 8486+)
If you want a straightforward way to stop mold from coming back, this Zinsser Mold Killing Primer is the sort of product you’ll reach for from the celler to roof.
You can paint it directly over many moldy or stained spots after cleaning, and its EPA-registered antimicrobial helps prevent regrowth on the paint film.
It’s water-based, works under most topcoats, and has decent coverage for touch-ups or small projects — proper for bathrooms, closets, ceilings, or behind backsplashes after a leak.
For everyday fixes and occasional remediation jobs, it’s an easy, practical primer to keep on hand.
What People Say
Most customers report it really does what it promises: covers stains and noticeably reduces mold regrowth when used correctly.
People often praise the thick coverage and easy application, while a few call out the price, wish for larger container options, or mention packaging issues on occasion.
Overall Sentiment: Positive
Situational Benefits
| Situation | How It Helps |
|---|---|
| Bathroom Ceilings | Use it on painted ceilings or trim where humidity causes recurring mildew; it covers stains and helps prevent spores from returning on the paint film. |
| Basements & Closets | Apply after cleaning damp, musty spots to lock down residual staining and reduce the chance of regrowth while you solve ventilation or moisture issues. |
| Behind Backsplashes / Cabinets | Handy for those hidden nooks where mold shows up after leaks — it seals and treats the surface so you can finish the job with regular paint. |
| Quick Post-Remediation Touch-Ups | When you need a fast, reliable primer for small areas you’re replacing or repairing, this product helps keep treated spots stable under a finish coat. |
Health Benefits
| Benefit | Description |
|---|---|
| Reduces surface mold regrowth | The antimicrobial in the primer helps prevent fungal organisms from recolonizing the paint film, thereby reducing visible mold return. |
| Helps control musty odors | By addressing the biological source on the surface, treated areas tend to lose the persistent moldy smell that can affect indoor air comfort. |
| Supports safer living spaces when used properly | Used as part of proper cleanup and moisture remediation, it reduces the chance of mold reappearing on painted surfaces, improving home conditions. |
Versatility
This primer fits many roles: minor fixes after leaks, prepping problem spots before repainting, or treating trim and cabinetry.
Because it’s water-based and paintable, you can follow up with most standard topcoats for a finished look.
Safety
EPA-registered antimicrobial formula; water-based (generally lower VOC than solvent primers), but follow label directions, ventilate the area, and wear gloves and a mask if sanding or working in tight spaces.
Note the product carries a Proposition 65 warning—read the label for handling and disposal guidance.
Problem Solving
It handles the cosmetic and biological sides by killing and covering mold on surfaces, so you won’t see stains or smell mildew as often.
It’s not a fix for ongoing moisture problems, though — you still need to address leaks, humidity, and structural issues to stop mold for good.
Eco Friendliness
Being water-based helps reduce solvent emissions compared with oil-based primers.
Still, single-use containers and the need for reapplication on large jobs mean you should plan their use carefully and recycle or dispose of them per local rules.
Key Benefits
- Kills and covers existing mold, mildew, and odor-causing bacteria
- EPA-registered antimicrobial built into the paint film
- Water-based formula that goes over a variety of surfaces and under topcoats
- Paint directly over mold without extensive pre-cleaning (after addressing moisture)
- Coverage suited for spot repairs and smaller rooms (about 160 sq ft per quart)
Current Price: $17.81
Rating: 4.5 (total: 3964+)
If you’re trying to keep musty smells and damp spots under control from the celler to roof, these DampRid hanging moisture absorbers are one of the easiest tools to reach for.
You hang a bag in a closet, laundry room, storage area, or other tight space and watch the crystals pull moisture into the catch pouch — no electricity or complicated setup needed.
They claim about 14% more absorbing power than smaller bags and can last up to 60 days, depending on humidity, and the time-release fragrance gives a light, fresh scent while they work.
For everyday use in closets and bathrooms and for seasonal storage or between-visit upkeep in basements, they’re a simple, low-effort way to cut down on dampness and keep fabrics and leather smelling cleaner.
If you want something low-maintenance that actually shows progress, these are worth having on hand.
What People Say
Customers commonly say the bags visibly collect water and noticeably reduce damp smells, especially in closets and storage nooks.
People appreciate how easy they are to set up and how the light fragrance freshens spaces, though a few note that lifespan varies with humidity, and that some batches arrived with packaging issues.
Overall Sentiment: Positive
Situational Benefits
| Situation | How It Helps |
|---|---|
| Closets | Hangs out of the way to protect clothes and leather goods from musty smells and slow moisture buildup. |
| Laundry Rooms & Bathrooms | Helps reduce lingering dampness where ventilation is limited, reducing the risk of mildew on fabrics. |
| Basements & Storage Areas | Useful in cool, semi-enclosed spaces to manage humidity around boxes, linens, and seasonal items. |
| Garages & Mudrooms | Fits in tight spots to absorb moisture near shoes, outerwear, and stored gear that can otherwise get musty. |
Health Benefits
| Benefit | Description |
|---|---|
| Reduces mold-friendly conditions | By lowering local humidity, treated areas are less hospitable to mold and mildew growth on surfaces and fabrics. |
| Improves indoor air comfort | Removing damp air and musty odors can make small, enclosed spaces feel fresher and more comfortable to breathe in. |
| Protects belongings | Lower moisture helps prevent mildew damage to clothing, shoes, and leather, which contributes to a healthier living environment. |
Versatility
These hanging bags work in lots of small, often-neglected spots — closets, cabinets, laundry rooms, storage shelves, and garages.
They’re portable and simple, and available in scented and fragrance-free options depending on whether you want a light scent or none at all.
Safety
No electricity required; keep out of reach of children and pets, and follow disposal instructions when liquid reaches the replacement line.
Not for use in moving vehicles and inspect seals before use to avoid leaks.
Problem Solving
They handle the symptom — excess humidity and the musty odors that come with it — by absorbing moisture and trapping it in the pouch.
They’re not a fix for active leaks or major ventilation problems, but they’re an effective, low-effort part of a broader moisture-control plan.
Eco Friendliness
No power draw is a plus, but single-use bags and plastic hangers create waste; using them thoughtfully and recycling packaging where allowed helps reduce impact.
Consider placement and frequency to avoid unnecessary replacements.
Key Benefits
- Eliminates musty odors by removing excess moisture from the air
- 14% more moisture-absorbing power compared with 14-ounce bags
- Lasts up to about 60 days, depending on humidity and temperature
- Time-release fragrance keeps a light, consistent scent
- Works without power — ideal for closets, storage areas, and small rooms
Current Price: $16.49
Rating: 4.7 (total: 25039+)
FAQ
How Do I Choose The Right Mold Prevention Product?
Start by matching the product to the problem: if you want to confirm whether mold is present, use a test kit first (for example, the Kayenqo kit is about $28.99), if you need to remove visible stains choose a proven cleaner (RMR-86 is effective and priced around $15.99 for a 30 fl oz bottle, while ACTIVE gel at $19.95 is good for seals and washer gaskets), and if you want ongoing protection consider a mold-killing primer like Zinsser at $17.81 or humidity control options such as DampRid hanging bags for about $16.49 or an air purifier like the Afloia at $69.99.
Pay attention to surface compatibility —whether a product is for porous or nonporous surfaces —and to the required contact time and the area you need to cover: a small tube of gel works for caulk and seals, a spray is faster for tile and grouting, and a primer covers and prevents regrowth on walls. Also consider maintenance tools (dehumidifiers, DampRid) and whole-room filtration (air purifiers) to address moisture from cellar to roof rather than just treating isolated stains.
Are These Products Safe To Use Indoors, and What Precautions Should You Take?
Many mold cleaners are powerful and safe when used as directed, but you should always follow the label. Potent formulations like RMR-86 work fast but produce harsh fumes, so ventilate well, keep kids and pets out of the area, and wear PPE such as gloves, eye protection, and, for strong sprays, a respirator or mask.
Do not mix cleaners (never mix bleach-based products with ammonia or acids), test a small, hidden area first to confirm material compatibility, and avoid over-saturating materials, as they can soak and spread spores.
For light or routine maintenance, you can rely on fragrance-free gels for seals or DampRid for humidity control, and use an air purifier to reduce airborne spores while you clean.
How Should You Use Mold Prevention Products Effectively From Cellar To Roof?
Think of mold control as a three-step process: detect, remove, and prevent. First, test suspicious areas so you know where to focus. Next, remove visible growth using the right tool for the job — spot-treat caulk and seals with a gel, spray tile and concrete with a fast-acting cleaner, or repaint problem drywall after cleaning with a mold-killing primer.
When applying concentrated cleaners, work in small sections, allow the full contact time called out on the label, and rinse or dry thoroughly.
Finally, prevent recurrence by fixing leaks, improving ventilation, and controlling humidity — use DampRid or a dehumidifier in closets and basements, run an air purifier in living spaces, and seal or paint treated areas to keep spores from returning.
Practical tips: treat only one small area at a time with strong sprays and step outside to get fresh air between applications, replace disposable moisture packs when the fluid reaches the indicator line, and follow up with a primer or repainting for long-term protection. By addressing sources and treatments across the house — from the cellar to roof — you’ll get better, longer-lasting results.
What Customers Prefer
When choosing between RMR-86 Instant Mold Remover, ACTIVE Mold Stain Remover Gel, and the KAYENQO Mold Test Kit, you typically prioritize how quickly and thoroughly a product removes mold versus whether you need a diagnostic test before treating.
You also weigh surface compatibility (for example, gel cling on vertical areas), chemical strength versus safety and odor, ease of use, and cost, so you can decide between immediate heavy-duty removal, a targeted clingy gel, or testing to guide treatment.
Wrapping It Up
You now have a practical set of choices that cover cleaning, testing, prevention, and air quality. Use a fast-acting spray like RMR-86 for stubborn stains, reserve a gel like ACTIVE Gel for tight seals and washer boots, confirm trouble spots with a kit like Kayenqo Kit, and improve air and humidity with an Afloia Purifier or DampRid packets.
For painted surfaces that have had issues, a mold-killing primer such as Zinsser Primer helps stop recurring growth.
Start by testing suspected areas, then match the right tool to the job — address the source of moisture first, use products safely with ventilation and PPE when needed, and you’ll protect your health and your home long term.
| Product | Image | Rating | Price | Specific Uses | Scent |
|---|---|---|---|---|---|
| RMR-86 Instant Mold and Mildew Stain Remover Spray |
 |
4.4/5 (N reviews) | $15.99 |
|
Fresh |
| ACTIVE Mold Stain Remover Gel Cleaner |
 |
4.1/5 (N reviews) | $19.95 |
|
Unscented |
| Mold Test Kit for Home |
 |
4.6/5 (N reviews) | $28.99 |
|
N/A |
| Afloia Air Purifiers for Home |
 |
4.5/5 (N reviews) | $69.99 |
|
Color-changing night light |
| Zinsser Mold Killing Primer |
 |
4.5/5 (N reviews) | $17.81 |
|
N/A |
| DampRid Fresh Scent Hanging Moisture Absorber |
 |
4.7/5 (N reviews) | $16.49 |
|
Fresh scent |
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