Our High Power Flexi Bond Adhesive is a one part, solvent free hybrid glue and sealant which comes in a 290ml tube that can be dispensed from a standard corking / silicone gun. It has been designed for bonding and sealing most common substrates (these must be dust and grease free). It can applied in either a grid system or a serpentine. We recommend 2 tubes per board/pack (circa per 2.5m Sq) applied directly to the back of the board, using an 8-12mm bead. Apply even pressure to the board when installing against the substrate, this should provide you with a 1mm adhesive bead.