Bond It Building Mastic Silicone Sealant Build-Mate Exterior Pointing Brown 310ml General Purpose Interior Door Window Sealing Tube Description: An oil based, gunnable pointing and sealing mastic for general exterior building use. Benefits: u Sag resistant. u Low toxicity. u Self repairing skin. u Does not harden under skin. u Over paintable (*check compatibility with paint in a small area before full scale application). u Adheres to most common building materials. Uses Offers superior adhesion to all building surfaces and can be overpainted when fully cures with most conventional oil based paints. Weatherproof in most applications. Bond It BUILDING MASTIC can be used to seal and bed window and door frames manufactured from metal or wood. It can also .