Silicone Plumbers Caulk: Hercules introduces silicone plumbers caulk to its line of professional-grade caulks for plumbers. It makes a permanently flexible, durable and UV resistant seal that is waterproof, air tight and mildew resistant. Tack-free in 30 minutes with a 24-hour cure, it also features a resealable nozzle.
Boiler Cleaner/Treatment: J.C. Whitlam offers an all-purpose boiler cleaner and treatment. It cleans all dirty boilers and controls sludge, corrosion, scale and foaming. Not for use in boilers containing anti-freeze.