This is a GLA285-13/3.5L DTM Urethane Primer. This is a DTM Urethane Primer, Dark Grey. This is a fast curing, easy sanding primer that provides easy handling from mixing to spraying. The primer is fast in air-dry applications & still retains a long potlife. Has excellent sag resistance & leveling. Very good adhesion on aluminum, steel, old paint, fiberglass & SMC.