Everbuild Everflex(r) 145 Butyl Rubber Sealant is a traditional one component sealant based on polybutene that provides an effective weatherproof seal in a variety of exterior and interior applications. It forms a skin in 24 hours but remains permanently plastic underneath. The sealant accommodates joint movement of 5%, is overpaintable and exhibits good UV and chemical resistance. This sealant is suitable for frame/joint sealing. It comes in a 310ml volume.