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RadonSeal Plus penetrates 4 inches into concrete to create a crystalline waterproofing barrier that hardens and strengthens the concrete itself — not just a surface coat. The formula reacts with calcium silicates in the concrete to form insoluble crystals that permanently fill microscopic pores, capillaries, and microcracks. Unlike surface coatings, it cannot be peeled, scraped, or worn away. One application provides permanent waterproofing and also reduces radon gas transmission.
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