Tetrion Powerseal is an easy to use, multi-purpose sealant and adhesive specially developed to ensure a long lasting flexible seal which will not crack, harden or dry out. Tetrion Powerseal is suitable for a wide range of uses in both domestic and trade building jobs. Suitable for Electrical Connection Insulation. Bonds and seals with most common building materials including metal, glass, rubber, GRP, fabric and most plastics.