This is a RMDE17/GAL CF Etching Primer. A non-chromated two part universal pretreatment primer for use under DP20 Diamond primer or DP21 Color-It primer. DE17 offers excellent adhesion & corrosion protection when used as a pretreatment primer over steel, aluminum, zinc or galvanized metals. DE17 must be mixed with DA18 etching acttivator prior to use.