Unibond Window & Door Frame Sealant - 300ml, Brown This specially formulated waterproof sealant creates a permanently flexible seal around polycarbonate sheets; UPVC, metal and wooden window and door frames; exterior cladding and draught-proofing. It's easy to apply and you can trim the nozzle to suit the desired joint width. Waterproof Flexible silicone Suitable for interior and exterior use Provides 10.6m coverage with a 6mm bead Colour: Brown
