HP 250 Primer is used to prepare EPDM membranes and compatible surfaces before the application of pressure-sensitive tapes and flashing products. It is formulated to improve adhesion by cleaning and conditioning the surface, helping ensure strong bonding performance within the ClassicBond roofing system.
The primer is typically applied using suitable cleaning materials and allowed to flash off before tape installation. Correct surface preparation with primer helps reduce bonding failure caused by dust, surface residue or weathered membrane.