Oatey® Clear Primer is an NSF-listed, aggressive primer for use on all schedules and classes of PVC and CPVC pipe and fittings. It removes contaminants such as surface dirt, grease and grime as well as softens the pipe surface to allow for a fast, secure solvent weld. Its clear finish will not stain most surfaces and applies easily with included in-lid dauber. Oatey products have earned the trust of plumbing professionals for over 100 years.