RadonSeal Plus 5 Gal. Deep Penetrating Concrete Sealer for Foundations and Basement Floors

The sealer penetrates deep into concrete (up to 4″), reacts, expands inside the concrete pores and cures as a hard silicate mineral. There is no need to ever reapply the product again! Once RadonSeal has cured inside the concrete, it can not be pushed out regardless of hydrostatic pressure.