Editor's Pick
Must-have for mitigated homes
RadonAway 50017 Easy Read Manometer
Every mitigated home needs one — confirms your fan is running at a glance.
Best DIY Radon Supplies & Accessories
Updated March 2026If you have a radon mitigation system, these are the maintenance essentials that keep it running effectively. Every mitigated home should have a manometer, and sealing foundation cracks improves system performance. These are the products trusted by homeowners and recommended by professionals.
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Check your manometer monthly — a zero reading may mean your mitigation fan has failed. Annual maintenance keeps your system protecting your family.
Our picks
Essential for sump-based systems
Jackel Original Radon/Sump Dome
Gas-tight seal for sump pits — a key part of any ASD system.
Quick maintenance fix
Titebond 3251 Radon Sealant
Seal foundation cracks and pipe penetrations to improve system performance.
Best for crawlspace encapsulation
Whitecap Premium 20 Mil Vapor Barrier
Heavy-duty barrier to block soil gas and moisture in crawlspaces.
Detailed reviews
Editor's Pick
#1
Monitoring your mitigation system daily
RadonAway 50017 Easy Read Manometer
$13.95
4.5
Pressure gauge (0–4.5″ WC)
Pros
- Industry standard — installed in 500K+ homes
- No batteries or power needed
- Easy DIY install with included hardware
Cons
- Manual reading only
- No alerts if fan fails
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#2
Sealing sump pits for radon mitigation
Jackel Original Radon/Sump Dome (SMR16101-CV)
$119.99
fits 28" OD sump pits
4.5
Sealed dome cover with view port
Pros
- Gas-tight HDPE structural foam
- Clear view port to inspect pump
- No need to remove existing basin
Cons
- Must verify pit dimensions (28" OD)
- May need professional fitting
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#3
Sealing foundation cracks and pipe penetrations
Titebond 3251 Radon Sealant (10.1 oz)
$8.47
per 10.1 oz tube
4.4
Sealant
Pros
- Formulated specifically for radon sealing
- Paintable and UV resistant
- ±25% joint movement flexibility
Cons
- Not a standalone mitigation method
- Must be applied to clean, dry surfaces
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#4
Crawlspace encapsulation and radon reduction
Whitecap Premium 20 Mil Vapor Barrier (12' × 100')
$799.99
covers 1,200 sq ft
4.2
Reinforced barrier membrane
Pros
- Heavy-duty reinforced Dura-Skrim 20 mil
- 1,200 sq ft coverage per roll
- Tear-resistant woven polyethylene
Cons
- Labor-intensive to install
- May need professional seam sealing
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#5
Reducing basement moisture alongside mitigation
GE 50-Pint Dehumidifier with Built-in Pump
$329.00
4.4
Plug-inHumidity sensor with auto defrost
Pros
- Built-in pump drains up to 16 ft away
- Energy Star certified
- Auto defrost for cold basements
Cons
- Uses electricity continuously
- Filter maintenance required
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Side-by-side comparison
| Product | Price | Best for | Rating | Action |
|---|---|---|---|---|
RadonAway 50017 Easy Read Manometer | $13.95 | Monitoring your mitigation system daily | 4.5/5 | View |
Jackel Original Radon/Sump Dome (SMR16101-CV) | $119.99 | Sealing sump pits for radon mitigation | 4.5/5 | View |
Titebond 3251 Radon Sealant (10.1 oz) | $8.47 | Sealing foundation cracks and pipe penetrations | 4.4/5 | View |
Whitecap Premium 20 Mil Vapor Barrier (12' × 100') | $799.99 | Crawlspace encapsulation and radon reduction | 4.2/5 | View |
GE 50-Pint Dehumidifier with Built-in Pump | $329.00 | Reducing basement moisture alongside mitigation | 4.4/5 | View |
Need professional help?
Find certified radon contractors near you for testing, mitigation, and system installation.
Find certified contractors near you →You might also need
Pair your maintenance kit with continuous monitoring
A digital radon monitor gives you real-time readings to confirm your mitigation system is working effectively.
Frequently asked questions
Can I reduce radon with DIY supplies alone?
DIY supplies like sealants and vapor barriers can reduce radon entry, but they are rarely sufficient on their own. The EPA recommends professional active soil depressurization (ASD) systems for homes above 4 pCi/L. These supplies work best as complements to a professional mitigation system.
What is a U-tube manometer and why do I need one?
A U-tube manometer is a simple liquid-filled gauge that shows whether your radon mitigation fan is creating suction. If the liquid levels are equal, your fan may have failed. It costs under $20 and every mitigated home should have one installed on the radon pipe.
How often should I check my mitigation system?
Check your U-tube manometer monthly and test your home's radon level every 2 years. Replace mitigation fans every 5-10 years depending on the model. If your manometer shows no pressure differential, contact a radon professional immediately.
How we evaluate these products
Our product recommendations are based on a structured evaluation process:
- Amazon rating analysis — We review aggregate ratings and read through recent customer reviews to identify patterns in reliability, accuracy, and user satisfaction.
- Feature comparison — We compare key specifications relevant to the product category (accuracy, sensors, connectivity, power source) to identify which products best serve specific use cases.
- Price-to-value assessment — We evaluate whether each product's features justify its price point relative to alternatives in the same category.
- Real-world use case matching — We identify the specific homeowner situations where each product is the strongest fit, rather than declaring a single "best" product for everyone.
We do not accept payment for placement. Products earn their position through the evaluation criteria above. As an Amazon affiliate, we earn from qualifying purchases at no extra cost to you.
Related resources
- System maintenance guide — keep your mitigation system running effectively
- Mitigation homeowner guide — understand your system before buying parts
- Find certified contractors — professional help when DIY isn't enough
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