Basement Waterproofing, Radon Mitigation and
Concrete Repairs Made Easy!

Cutting-Edge Solutions for Concrete, Bricks and Basements

Unique, high-tech products developed to prevent or repair all the common problems found in basements, concrete floors, indoor or outdoor concrete, bricks and masonry:

• wet basement – water seepage through concrete or cracks
• damp basement – high humidity caused by the seepage of water vapor
• cracks in concrete, floor-to-wall joints, expansion control joints
• efflorescence – whitish, powdery deposits of minerals carried by water to the surface
• condensation – garage floors or basements
• high radon level – radon gas seeping through concrete, cracks, and openings
• dusting of concrete or bricks – harmful to the lungs and machinery
• spalling or pitting of driveways and outdoor concrete – due to road salts and freeze/thaw cycle
• sealing and color staining of concrete driveways and slabs
• crumbling of concrete in marinas due to wind-carried salts
• sealing exterior brick walls and chimneys against wind-driven rain
• mold and mildew remediation and prevention, elimination of musty odors
• algae growth on outdoor concrete
• poor indoor air quality – molds, spores, chemical gases and radon
• flooding caused by a sump pump or power failure.

For information and solutions to your problems, choose the appropriate Topics (on the left).

Select from the largest choice and highest quality of penetrating sealers available anywhere! Professional-quality products for large projects, yet easy enough for small contractors or do-it-yourself application by homeowners. User- and environment-friendly. Not available in stores – shipped directly from the factory for the lowest possible price.   

Wet Basement, Radon, Musty Odor, Mold and Mildew?

You are not alone! Basements are the No. 1 complaint of homeowners:

• over 60% of homes have a wet basement
• one in 3 homes have some molds and mildew, while over 2% have the toxic "black mold"
• one in 6 homes have an elevated level of the cancer-causing radon gas.

Most basements start leaking water within 10 or 15 years. Efflorescence ("white powder") or musty odors are the telltale signs of a 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!

The "Dirty Little Secret" – Concrete is Porous!

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 half of the water has to evaporate. As this surplus water pushes to the surface, it leaves behind a network of capillaries (pores).

The pores are much larger than water molecules. Water vapor or gases flow easily right through, drawn in by the low 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.

Why Dry Basements Become Leaky Basements

Wet basements evolve slowly but surely, particularly, when the soil is clayish: The soil around the foundation settles, creating "reverse grading." The disturbed soil under the slab settles and holds water. The plastic vapor barrier collects rainwater coming over its sides, forming a pool right under the slab (but fortunately, it disintegrates after several years).

Most moisture gets into basements in the form of water vapor. Vapor 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, brittle and it cracks, because 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 break. 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.

How to Waste $1,000s on Waterproofing a Basement

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 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, if the soil is clayish. 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 still do little for the 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, you could have used RadonSeal.

What the US EPA Does Not Tell You about Radon!

Actually, it does, but in small print: The 4 pCi/L Action Level for radon is NOT a "safe level" but only a "macroeconomic" recommendation. There is no safe level of this radioactive gas, which causes lung cancer – the No. 1 cancer killer. Radon causes more deaths than fires, drownings, and airplane crashes combined! Among non-smokers, radon is the leading cause of lung cancer but the media are bewildered when it kills a non-smoking celebrity. ("Secondary smoking" causes only 1/10 of the deaths radon does yet is much more publicized.)

People naturally assume that the Action Level is similar to the strict safety limits on other carcinogens, but the cancer risks at the radon Action Level are 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. Children are particularly susceptible. The vast majority of radon-induced lung cancers occur in homes with radon concentrations below the 4 pCi/L Action Level.

You can order EPA-approved radon test kits at unbeatable prices - just click "Order Online." And if you also purchase RadonSeal at the same time or within two months, the test kit is on us – we will issue you a $10 rebate.

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.

RadonSeal = Waterproofing and Radon Mitigation in One!

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.)

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.

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.

Radon Mitigation Made Easy!

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. Backed up by a limited 20-Year Money-Back Guarantee (see Terms & Conditions).

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.

How to Stop Molds and Mildew

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 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 kill and clean visible molds and place several jars of BioZap Air Purifier to control all the invisible molds and spores floating in the air or hiding in porous surfaces. Reducing humidity is the key to mold remediation – deep-seal your basement or slab with RadonSeal.

Shipping and Ordering

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. Check out Commercial Conditions.

For the most secure and encrypted SSL online processing of credit card orders, just click ORDER ONLINE. Or you can make secure payments using PayPal. If you prefer mailing a money order or check, use the Order Form. Or, simply phone your order in!

  Information for Canadian customers.

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MADE IN USA
Products not sold through retail stores. Available exclusively from:
Radon Mitigation & Waterproofing Concrete Sealer Co.
Novion Inc., 18 L'Hermitage Drive, Shelton, CT 06484 USA
RadonSeal™ is a registered trademark. Copyright © 1998-2008. All rights reserved.

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