Hyload DPC Mastic Cartridge 400ml Synthetic rubber mastic adhesive with gap filling properties up to 6mm. Supplied in 400ml cartridges, IKO Hyload DPC Mastic is suitable for bonding surface-fixed IKO Hyload high performance DPC cavity trays and preformed cloak units to a wide range of common building materials such as block, concrete or metal. Delivery available to nationwide. For more information on this product see manufacturers website here.