Pioneer Pro Flex o Seal is a Polyurethane sealant that cures into a flexible, durable, and weather resistant elastomeric sealant that has a very good adhesion to most construction materials. For use on construction joints, pre-cast panels, and most construction substrates. It is paintable, non-sag, and non-staining.   Discover Pioneer Pro Flex-O-Seal: A polyurethane sealant…