5 Gal. Plus Penetrating Concrete Sealer

An excessive amount of water during the initial cure causes fine particles to rise to the surface resulting in a weak layer of “laitance” on the surface. Sealing the concrete with RadonSeal will increase surface hardness, helping to reduce surface dusting due to a compromised pour (45% increase in surface hardness | >200% increase in wear resistance). In a high-percentage of applications, RadonSeal alone will significantly cure the dusting problem. With that said, concrete varies greatly! If the problem is more severe, use LastiSeal Brick & Concrete Sealer as a secondary sealer to further bind the surface. Nothing replaces a proper vapor barrier underneath slabs, but RadonSeal will aid in the reduction of moisture transfer through concrete by internally sealing the matrix of concrete (pores and capillaries).

Yes, you can paint concrete over a surface sealed with RadonSeal. Applying Paints & Coatings – Wait 10+ days before applying paints, coatings, adhesives, or patch repair compounds. As RadonSeal begins to react and expand inside the concrete it may purge dirt, loose minerals, salts, and efflorescence to the surface for several days after application. Clean purged contaminents and efflorescence by mechanical or chemical means when necessary.

Yes, you can paint concrete that has been sealed with RadonSeal. Applying Paints & Coatings – Wait 10+ days before applying paints, coatings, adhesives, or patch repair compounds. As RadonSeal begins to react and expand inside the concrete it may purge dirt, loose minerals, salts, and efflorescence to the surface for several days after application. Clean purged contaminents and efflorescence by mechanical or chemical means when necessary.

RadonSeal is a penetrating (impregnating) sealer and should only be applied to a bare and porous concrete surfaces.

Proper application of RadonSeal to poured concrete requires two wet-on-wet applications roughly 15-30 minutes apart. This ensures optimal results. The listed coverages included both applications so 1-gallon will do roughly 200 sq.ft. in two applications. Applying less sealer will diminish your results but it would certainly have a beneficial impact.

RadonSeal cannot be applied to painted surfaces (no penetrating sealer can). Paint would prevent proper penetration and not allow the sealer to function as designed. Concrete should be clean, dry, and porous before applying RadonSeal

RadonSeal is not recommended for use on acid stained concrete. The appropriate sealer to use would be LastiSeal Brick & Concrete Sealer.

First, make any necessary repairs to cracks, mortar joints, corners, and floor-to-wall joints where the water will more easily finds its way int. Secondly, apply RadonSeal to the blocks. Lastly, skim coat the wall 10-days after applying RadonSeal. FYI – Cinder blocks are water-permeable blocks and not easy to seal. In severe cases, impossible to waterproof from the inside/out (excavation and reapplying damp-proofing coatings would be required). If you need expert advice, please contact a RadonSeal product technician.

The 5 gal. can cover up to 1000 sq. ft.

Now would be a great time to permanently seal the concrete with RadonSeal. By eliminating moisture from below you will protect your carpet and laminate. First check too be sure the concrete is porous. RadonSeal needs to be able to penetrate into order to work properly. Interior slabs are often finished very smooth, making them "tight" on the surface. Use PowerEtch to prep the concrete if necessary (a safe alternative to acid etching). The concrete should be clean, dry, and porous, before sealer application.