Clear aggressive primer for use on PVC and CPVC pipe and fittings, Lo-V.O.C. Primer meets California South Coast Air Quality Management District (SCAQMD) 1168/316A or BAAQMD Method 40 and various environmental requirements, Removes surface dirt, grease and grime as well as softens the pipe surface to allow a fast, secure solvent weld, ASTM Specifications: ASTM F-656