Basement Waterproofing, Radon Mitigation, and
Concrete Repairs Made Easy!

Seal Your Basement, Concrete Driveway, Chimney, and Pavers

Unique sealers and innovative repair products for basements, concrete slabs, driveways, pool decks, ponds, brick chimneys, and stones. Professional quality for large projects but easy-to-use by small contractors and do-it-yourselfers. Safe and environment-friendly.

Select from the widest choice and the highest quality of waterproofing sealers for concrete, brick, and masonry available anywhere! They penetrate deeper, seal tighter, and last much longer. Do it once and do it right! Not available in stores – shipped directly from the factory for the lowest possible price. 

D-I-Y Solutions for Basements, Concrete, and Bricks

SEALERS FOR CONCRETE, BRICK AND MASONRY
How to select the best sealer for your project
RadonSeal Deep-Penetrating Concrete Sealers The #1-ranked basement sealer. Penetrates up to 4" into concrete, reacts, and internally seals against water and molds, water vapor and even radon gas. Permanent! For indoor or outdoor concrete, concrete blocks, new or old concrete. Backed up by a Limited Lifetime Guarantee!
LastiSeal Concrete Stain & Sealer Waterproofs and stains concrete in one step! Beats acid-staining. Penetrates 2-4". Permanent. 10-year waterproofing guarantee.	LastiSeal Brick & Masonry Sealer Waterproofs bricks, bricks, pavers, concrete, and stones. Permanent. 10-year waterproofing guarantee. Choose flat or satin finish.
DryWay Water-Repellent Sealer Protects driveways, garage floors, outdoor concrete, brick walls, and masonry against rainwater, spills, and contaminants. Beads water up to 10 years.	Ion-Bond Armor Subsurface Sealer Forms a subsurface waterproof barrier inside concrete or masonry against negative side water pressure. Reduces vapor and radon. Seals even through latex paint. Permanent.
JOINT AND CONCRETE CRACK 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 in 30-ft. and 60-ft. sizes. 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.	ElastiPoxy Joint & 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
Hi & Dry Water-Powered Backup 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.	Hi & Dry Battery-Powered Backup 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.
FloodWatch High-Performance Sump Pump Kits FloodWatch 3000 Sump Pump outperforms most primary pumps – 3,000 GPH at 10-ft. lift. High reliability at an unbeatable price - guaranteed! Vertical switch. Alarm. Complete D-I-Y kits for installation as your Backup Pump, Secondary Pump, or Primary Sump Pump.
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.
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.

Water Breaks Down Concrete and Bricks

Problems with Basements and Concrete Slabs

wet basement – water seeping through concrete walls or floor cracks in basement walls cracks in concrete floors leaking floor-to-wall joints or expansion control joints leaking form ties or pipe penetrations efflorescence - the sign of beginning water seepage radon gas seeping through concrete and openings damp basement – water vapor infiltration molds and mildew, musty odors condensation - in basements or on garage floors concrete dusting – harmful to the lungs and machinery sump pump failure – backup sump pump needed leaky crawlspace or storm shelter

Problems with Outdoor Concrete, Bricks, and Masonry

spalling or pitting of driveways and outdoor concrete due to freeze/thaw cycle and road salts cracks in driveways, pool decks, and patios leaking brick walls and chimneys due to wind-driven rain crumbling bricks efflorescence on concrete or brick walls, and pavers deteriorating stone or masonry walls pool decks - cracks, pit marks, deterioration cracks in swimming pools leaking fish ponds deterioration of concrete in marinas due to wind-carried salts algae growth on outdoor concrete or bricks concrete needs staining

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 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!

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 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.

How Dry Basements Become Leaky Basements

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 ElastiPoxy Crack Filler and CrackWeld Floor Repair Kit.

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 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.

There is No Safe Radon Level

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
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.

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.

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.

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.)

RadonSeal seals concrete against water seepage, vapor, molds, and radon. Bonds, strengthens and hardens concrete, reduces cracking and dusting.     Neutralizes alkalis, preserves concrete, protects paints and coverings.

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.

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 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.

Ordering and Shipping

For secure and encrypted online processing of your order, click ORDER ONLINE. You can use your credit card, PayPal account, or Google Checkout. Or simply phone your order in! If you prefer mailing a money order or check, use the Order Form. Our products are also available at Amazon.com and RadonSeal website at Amazon.

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 expedited shipping or shipping to other states and Canada, please inquire first by email or telephone.

Orders shipped to Connecticut are subject to state sales tax. Check out Commercial Conditions.

  Information for Canadian customers. RadonSeal Concrete Sealer is now available in Canada from ECO Building Resource, Ontario tel. 905-841-3535.