Denso Fast Drying Primer D 5Litre (49-01-0009) DENSO (200783), Features: Denso Primer D is an oxidized bitumen in aliphatic and aromatic hydrocarbon solvents. A fast drying bitumen based primer for all surfaces prior to the application of Denso bitumen Tape. Fills surface irregularities for intimate contact of tape compound • Promotes high adhesion • Fast drying • Good penetration characteristics • Can be brush or spray applied. Prepare surfaces by removing all loose scale, rust or other foreign matter by grit blasting or wire brush. Apply a thin uniform coat of Denso Primer D to clean surface and allow to tack dry. Drying time will be dependent on surface temperature.