IPEX System 636 PVC & CPVC Primer is specifically designed for use with System 636 Flue Gas Venting pipes and fittings that meet ULC S636 standards. This primer meets ASTM F656 specifications for solvent cement joints in PVC plastic pipes, ensuring strong and reliable connections. Ideal for installations below 0°C, it enhances the bonding of PVC and CPVC materials. With low VOC emissions (550 g/L), this primer provides excellent performance for both residential and commercial applications.