Titebond Radon Sealant is a flexible, long-lasting sealant that effectively prevents the entry of radon. This permanent solution can accommodate up to ± 25% joint movement and is resistant to UV rays, mold, and mildew. It can be easily applied to foundation cracks, joints, penetrations, and around pipes, as well as used with foundation coatings and membranes. According to the EPA, the use of sealants can help reduce radon entry through the foundation. To ensure maximum effectiveness, it is recommended to also install a professional radon mitigation or fan-based system alongside this sealant.