Editor's Pick
Best system monitor
Radon U-Tube Manometer
Cheapest way to verify your mitigation fan is running every day.
Best DIY Radon Supplies & Accessories
Essential tools and materials for maintaining your radon mitigation system, sealing entry points, and monitoring system performance. These products complement professional mitigation — they are not replacements for a certified installation.
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Our picks
Best for sump pits
Radon Sump Pit Cover
Essential for sump-based mitigation systems to seal soil gas entry.
Best quick fix
Radon Crack & Joint Sealant
Seal foundation cracks and pipe penetrations as a first step.
Best for crawlspaces
Crawlspace Vapor Barrier (20 mil)
Heavy-duty barrier to block soil gas and moisture in crawlspaces.
Detailed reviews
#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
#2
Sealing sump pits for radon mitigation
Jackel Original Radon/Sump Dome (SMR16101-CV)
$112.09
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
#3
Sealing foundation cracks and pipe penetrations
Titebond 3251 Radon Sealant (10.1 oz)
$6.99
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
#4
Crawlspace encapsulation and radon reduction
Whitecap Premium 20 Mil Vapor Barrier (12' × 100')
$189.99
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
#5
Reducing basement moisture alongside mitigation
GE 50-Pint Dehumidifier with Built-in Pump
$279.00
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
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) | $112.09 | Sealing sump pits for radon mitigation | 4.5/5 | View |
Titebond 3251 Radon Sealant (10.1 oz) | $6.99 | Sealing foundation cracks and pipe penetrations | 4.4/5 | View |
Whitecap Premium 20 Mil Vapor Barrier (12' × 100') | $189.99 | Crawlspace encapsulation and radon reduction | 4.2/5 | View |
GE 50-Pint Dehumidifier with Built-in Pump | $279.00 | 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 →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.
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