
Unique and innovative products for the prevention or repair of common problems in basements, concrete slabs, indoor or outdoor concrete, bricks, and masonry. Professional quality products for large projects, yet easy enough for small contractors or do-it-yourself application by homeowners.
Problems with Basements and Indoor Concrete![]() |
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Problems with Outdoor Concrete, Bricks, and Masonry |
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User- and environment-friendly products. Not available in stores – shipped directly from the factory for the lowest possible price. Select from the widest choice and highest quality of penetrating sealers available anywhere! All our sealers seal inside the substrate, leaving no film on the surface that can wear off.
| SEALERS FOR CONCRETE, BRICK AND MASONRY | |
| How to select the best sealer for your project | |
RadonSeal Deep-Penetrating Concrete Sealers Penetrates up to 4" into concrete, reacts, and internally seals against water, vapor, radon, and molds. Permanent. For indoor or outdoor concrete, new or old. Backed up by a Limited Lifetime Guarantee! |
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| LastiSeal Masonry Color Sealer Waterproof and stain your concrete in one step! Beats acid-staining. Penetrates 2-4". Permanent. 10-year waterproofing guarantee. |
LastiSeal Concrete & Brick Sealer Waterproofs concrete, bricks, pavers, and stones. Permanent seal. 10-year waterproofing guarantee. Flat or satin finish. |
| *NEW! DryWay
Water-Repellent Sealer Protects driveways,garage floors, outdoor concrete, bricks, and masonry against rainwater, spills, and contaminants. Beads water up to 10 years. |
IonBond Armor Subsurface Sealer Forms a subsurface waterproof barrier in concrete or masonry against negative side water pressure. Reduces vapor and radon. Seals even through latex paint. Permanent. |
| CRACK, JOINT AND CONCRETE REPAIR | |
| D-I-Y Concrete Crack Injection Kits Repair permanently cracks in poured concrete walls, pipe openings and leaking form wire ties with urethane or epoxy injection. |
Professional Concrete Crack Injection Toolkits Available sizes 30-ft. and 60-ft. A professional dual-cartridge caulking gun included. |
| CrackWeld Concrete Floor Repair Kits Quick and easy repair of cracks in slabs, driveways, patios, pool decks. No routing needed. Rigid repair. Stronger than concrete. |
Epoxy Crack Filler Kits Flexible repair of floor-to-wall joints and control joints. Repair cracked or leaking blocks, spalled driveways, cracks, or holes in concrete. |
| BACKUP SUMP PUMPS | |
| Water-Powered Sump Pumps Use the pressure of municipal water. No worries about batteries. Fully automatic. Mounted high and dry above the sump pit for superior reliability and service life. |
Battery-Powered Sump Pumps Protect your basement against power outages or sump pump failures. Fully automatic. Uniquely placed out of the sump water for superior reliability and service life. |
| CLEANING, STRIPPING AND ETCHING CONCRETE OR MASONRY | |
| EasyEtch Concrete Etcher Preps concrete for sealing, painting, or staining without the hazards of muriatic acid. Ready-to-apply. Biodegradable. |
Cleaning Concrete, Bricks, and Masonry Remove efflorescence, paint, adhesive, mastic, or stains with high-performance cleaners. |
| CLEANING MOLDS AND MILDEW STAINS, MUSTY ODORS | |
BioZap Air Purifier & Deodorizer The genuine Australian Tea Tree Oil air cleaner. No ozone or synthetic scents. BioZap vapors break down moldy and organic odors from indoor air, textiles, and furnishings. For basements, bathrooms, duct systems, ships, homes and offices. |
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| BioZap Mold & Mildew Cleaner No chlorine or harsh chemicals. Removes mildew and organic stains from surfaces and textiles. Just spray it on the contaminated concrete, masonry, wood, carpets, beds, and upholstery. |
BioZap Laundry Pre-Soak Uses Australian Tea Tree Oil to remove mildew stains, organic contaminants, and stubborn body or smoke odors. Great for athletic gear, sneakers, underwear, smoke damaged clothing. |
| TEST KITS | |
| Vapor Transmission Test Kits Make sure to test moisture vapor emissions and pH of the concrete slab before coating or installing flooring. |
Radon Test Kits For air or water. EPA-approved. Shipping, testing, and official reports included. Unbeatable prices. |
You are not alone! Basements are the No. 1 complaint of homeowners:
Most basements start leaking water within 10 or 15 years. Efflorescence ("white powder") or musty odors are the telltale signs of an incipient moisture problem. Finishing the basement traps water vapor seeping through the concrete, which causes molds and musty odors in many basements. Rising basement air then spreads molds and radon gas through the house.
Protect your concrete against deterioration before it starts leaking! And definitely, protect your basement remodeling investment by first sealing the walls and floor against water and vapor, molds, and radon.
Click for a larger picture! |
How come my concrete leaks? Is it a miracle? Most people do not realize that concrete is porous – in fact, more porous than Swiss cheese! The pores constitute 12 to 18% of the concrete but the pores are invisible, much smaller that human hair. After concrete is poured, almost a half of the water has to evaporate. As this surplus water pushes to the surface, it leaves behind a network of capillaries (pores) inside the concrete.
The pores are much larger than water molecules. Water vapor or gases flow easily right through, drawn in by the lower pressure inside buildings. But liquid water is initially held back by its surface tension, as the glob of water gets stuck inside the microscopic dry pore. However, as water enlarges the pores or they get wet by condensation, water starts seeping in. And eventually, the pores start actively pulling in water by capillary action.
Concrete blocks, particularly cinder blocks, are more permeable to water vapor than poured concrete. They all start as impermeable to liquid water but, when exposed to water, their porosity increases and they start seeping water.
Even if your basement or concrete slab looks perfectly dry, deep-seal it against invisible water vapor and gases, and protect it against water migration, efflorescence, and deterioration.
Wet basements evolve slowly but surely, particularly, when the soil contains clay. The soil around the foundation settles, creating "reverse grading." The disturbed soil under the slab settles and holds water. The plastic vapor barrier under the slab collects rainwater coming over its sides, forming a pool (but fortunately, it disintegrates after several years).
Most moisture gets into basements in the form of water vapor. Water molecules, not held back by the surface tension of liquid water, easily ooze through the pores in concrete. In humid weather, the high humidity will increase condensation on cold concrete surfaces.
Concrete slabs are usually poured directly on a plastic sheet, which increases the slab curl, stresses, cracking, and porosity. As the foundation settles, stress cracks appear. Sump pumps wash away soil from around the foundation and speed up the settling.
Exterior tar waterproofing is cheap but brittle and it cracks as the concrete continuously moves. However, even the best waterproofing membranes are attacked by lime from the concrete and are guaranteed for only 5 or 10 years. Drainage gravel around the foundation stops draining as it silts up, and footing drains often silt up or collapse. This increases the water pressure on the foundation. Cracks in the walls and floor start leaking water.
Capillary water dissolves lime inside the concrete, making it more and more porous. Water infiltration corrodes rebar, which expands and cracks the concrete. Water begins seeping through the pores in concrete and leaches out minerals to the surface (efflorescence).
RadonSeal or LastiSeal seal concrete against the seepage of vapor or water. RadonSeal reacts, strengthens the concrete, reduces cracking, and by neutralizing lime, it greatly extends the life of exterior waterproofing coating. You can repair cracks like a pro with the Crack Injection Kit or Epoxy Crack Filler and CrackWeld Floor Repair Kit.
When trying to repair your damp or wet basement, you might get stuck in an endless cycle of waterproofing "fixes" that consume more and more money:
You install a couple of dehumidifiers, costing you $90 a month to run but they pull in more moisture through the concrete and gradually make it more porous. You buy "waterproofing" paint in a store but as a latex-based paint, it is porous and lets in water vapor, and it will soon peel due to efflorescence and water pressure. So, you get a sub-slab interior perimeter drain system (say, $5,000) and while extra drainage is always good, it does little for the inflow of water vapor or for water seepage through the walls. Meanwhile, the increasing concrete porosity will let in more radon gas and you get a fan-based radon mitigation system ($1,200).
Then, you go for a "de-watering system" (internal gutters) which channels water seeping through the walls to a sump pump but this ignores water evaporation and you cannot frame in the walls. So, you select a good contractor to excavate, apply exterior waterproofing coating and repair the footing drains ($14,000). It will likely last for about 10 years but will do little for the slab or dampness. If you finish the basement, water vapor will get trapped behind the walls and under the flooring. Floor tiles will "pop" as alkalis attack the adhesive. High humidity will promote molds, mildew, and musty odors.
Instead of all that, you could have just used RadonSeal.
As the US EPA explains, there is no safe level of this radioactive gas which causes lung cancer, the No. 1 killer among cancers. Radon causes more deaths than fires, drownings, and airplane crashes combined! Among non-smokers, radon is the leading cause of lung cancer, yet the media are bewildered when it kills a non-smoking celebrity.
| Radon Guidelines for Homeowners | |
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| 0.4 pCi/L | the "Target Level" for homes (The U.S. Congress) |
| 2 pCi/L | EPA's "Consider Action Limit" – consider fixing your home! |
| 4 pCi/L | EPA's "Action Level" – fix your home! |
People assume that the Action Level is equivalent to the safety limits on other carcinogens but the cancer risk from radon at 4 pCi/L is hundred times higher. The mortality risk is three times higher than the risk of dying in a car crash or the equivalent to smoking 10 cigarettes a day (US EPA). Among women, it increases the lung cancer risk by 50%.
We receive more radiation exposure from radon than from all other sources combined. The average home is 10-times more radioactive than the maximum allowed at the fence of a nuclear power station.
The vast majority of radon-induced lung cancers occur in homes with radon concentrations below the 4 pCi/L Action Level. Children are particularly susceptible.
Always reduce your radon level to a practical minimum! The cancer risk is proportional to the radon level. Reducing radon from your current level by 50% (or 90%) lowers the cancer risk to each member of your family by 50% (or 90%). Seal your basement or slab with RadonSeal and then, seal all openings or cracks.
You can order our EPA-approved radon test kits at unbeatable prices. And if you also purchase RadonSeal at the same time or within two months, the test kit is on us – you will get a $15 rebate.
The tiny atoms of radon gas flow easily through the pores in concrete. RadonSeal is the strongest concrete sealer available, the only concrete sealer developed to stop even radon. It seals microscopic capillaries deep inside concrete and makes radon levels below 4 or 2 pCi/L readily achievable. Most homeowners achieve the 1.2 - 2 pCi/L range or, when starting below 4 pCi/L, reduce it by at least 50 percent.
Compared to the installation, operation, and energy losses of a fan radon mitigation system, the average homeowner saves $2,300 over ten years. RadonSeal protects the market value your home - it avoids unsightly piping with a noisy radon fan and the worries of prospective buyers. And it does not spew concentrated radioactive gas (over 1,000 pCi/L), eight times heavier than air, above the house.
If the house already has a fan radon mitigation system, RadonSeal will reduce the radon level further and will lower its energy losses (in the reverse flow of treated air through the slab). And it does not depend on the reliability of mechanical equipment or the power grid.
Concrete paints, waterproofing sealers or cementitious coatings are a temporary fix only. They crack or peel and cannot stop gases or water vapor. Why not tackle the root cause of the problem? Seal those pesky pores inside concrete with RadonSeal and combine waterproofing, damp-proofing, mold remediation, and radon mitigation in one!
RadonSeal deep-penetrating reactive concrete sealer penetrates deep into concrete (up to 4 inches!), reacts with lime and alkalis, forcefully expands inside capillaries, and hardens as an insoluble silicate mineral. (Silicates are the "binders" in concrete.)
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This is not "your father's" concrete sealant! It does much more than surface sealants and is permanent – you will never have to apply it again! It does not leave a film or color that could peel or wear off. RadonSeal seals porous cementitious materials – indoor and outdoor concrete, concrete blocks, cinder blocks, mortar, stucco, grout, old or new. Backed up by a Limited Lifetime Guarantee !
Quick and easy application with a hand-pump garden sprayer on the inside (or outside) of the basement. (Existing paints or sealers must be removed first!) RadonSeal is a waterborne concrete sealer – zero VOCs, no noxious fumes, non-toxic, nonflammable, and non-hazardous. The surface will remain non-slippery and paintable.
Mold spores cause allergies, asthma, airways infections, and other health problems, particularly in children. Mold and mildew, fungi, bacteria, and dust mites flourish in high humidity (over 50%). Your basement or foundation slab is by far the single largest source of humidity in the home. The average basement (or slab) lets in over 15 (10) gallons of water each day – several times more than showering and cooking combined!
Use our BioZap Mold & Mildew Cleaner to get rid of visible molds and place several jars of BioZap Air Purifier against all the invisible molds and spores floating in the air or hiding in porous surfaces. Reducing humidity is the key to long-term mold remediation – deep-seal your basement or slab with RadonSeal.
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Most orders received in the morning are shipped the same day by courier, who delivers within 3 to 5 working days in the lower 48 states. For faster shipping or shipping to other states, inquire first by email or telephone.
Orders shipped to Connecticut are subject to state sales tax. Check out Commercial Conditions.
Information for Canadian customers.
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Any questions? Please contact us by e-mail or phone toll-free 1-800-472-0603 or 203-225-0367
MADE IN USA
Products not sold through retail stores. Available exclusively from:
Radon Mitigation & Concrete Waterproofing Co., Novion Inc.,
18 L'Hermitage Drive, Shelton, CT 06484 USA
RadonSeal™ is a registered trademark. Copyright © 1998-2010. All rights reserved.
