Granville PU-Flex Sealer Black - 310ml Granville PU-Flex Sealer Black - 310ml PU Flex can be used for a wide range of bonding and sealing applicationsPU Flex once cured can be overpainted with all paint typesPU Flex is a one component moisture curing, high modulus polyurethane sealant and adhesive GBP 13.99 1