Hercules® Sta Put® Plumbing, Sealing and Caulking Compound provides superior sealing properties with a smooth appearance when setting plumbing fixtures, bowls, faucets, basin cocks, strainers, plugs and sink frames. It remains flexible and strechable, is easy to mold and resists hardening to create a watertight seal. It will not stick to hands, for easy application. Not for use on porous materials. Behold the power of Hercules®, products built to last and trusted by plumbers to withstand even the toughest conditions.