The Danco waterproof silicone sealant grease is ideal for lubricating faucet stems, valves and cartridges when repairing a leaky faucet Plumbers faucet and valve grease helps reduce friction, provides longlasting lubrication and helps hardturning faucets work smoothly It is NSF 61 approved and meets or exceeds the requirements of FDA regulation 21 Our silicone faucet grease works well in temperatures between 40 to 400 deg F and can be formulated for many plumbing and household applications This silicone faucet grease is water resilient and oxidationresistant and can be used on ceramic stems