Bostik Seal ‘N’ Flex® 1 is a one part, gun grade, moisture curing, low flex polyurethane sealant. ± 50% joint movement, Resistant to normal weathering conditions such as rain, sunlight, snow, atmospheric contamination and pollution, CSIRO RILEM LONG TERM SEALANT DURABILITY STUDY DBCE Doc.97/196 (M)., Uses: Insitu concrete and render, Brickwork & blockwork, Weatherproof sealing of joints in precast and tilt up panels, Plasterboard face and paper lined recessed edges, Suitable for: Masonry, Timber, Plasterboard, Fibre cement sheet, Alumium windows, Doorframes, Granite, Sandstone, Marble, GRC, Fibreglass, Most specialty panel systems,