Black Swans Marble Plus Plumbers Putty is an oil-free putty and can be used on
porous surfaces such as marble, granite, stone, plastics, rubber, fiberglass, etc. Will not
stain like conventional plumbers putty. A special formulated putty which will stay soft
and flexible and will not shrink, bleed, harden, crack or crumble. It is gas proof, odor
proof and water resistant. Can be used for setting bowls, fixtures, faucets, strainers,
basin cocks, sink frames, and many other sealing and caulking applications. Meets
Federal Specifications TT-P-1536A.