Formulated for the most rigorous industrial applications, Weld-On 10224 P-70 Clear PVC/CPVC Primer 1 pt helps ensure proper pipe welding. It is compatible with all PVC and CPVC pipes and fittings and is especially recommended for use on Schedule 80 as well as large-size pipe. Once applied, this non-bodied pipe primer acts quickly to soften and dissolve the joining surfaces, helping to promote maximum fusion during welding. Follow with the solvent cement of your choice to achieve a strong, high-contact, and long-lasting joint. The benefit of P-70’s strong, aggressive priming action is especially noticeable on parts being joined together in cold weather.