All Hercules cements, primers and cleaners have low V.O.C.

Hercules UnPurple Primer is designed to be used anywhere that regular purple primer can be used. Instead of being colored purple, a clear primer with a unique patented ultraviolet sensitive ingredient reveals its purple presence under UV light, helping to prevent staining and the resulting property damage. Patented Unpurple Primer is designed to work identically to other PVC/CPVC primers. No new technique is involved in the installation or testing. Simply apply as any other primer would be used.

This product meets standards set by theNational Sanitation Foundation (NSF), and the specifications of the American Society for Testing and Materials (ASTM) as required by the Uniform Plumbing Code of the International Association of Plumbing and Mechanical Officials (IAPMO).
Primer color: Clear: VOC Level: 510 gpl