Plumber's Putty is a ready-mixed, waterproof, non-setting putty designed for sealing and bedding w/c soil pipes, joints in sanitaryware, sinks and waste water fittings. Plumbers Putty will seal ceramics, vitreous enamels, metals and PVC. Plumbers Putty remains permanently flexible to allow for joint movement, is overpaintable and is compatible with Everflex Silicone Sealants.