The absolute best lubricant for residential sink faucets is 100-percent food-grade silicone grease (commonly sold as plumber's grease). Silicone grease is waterproof, chemically inert, safe for potable water systems, and will not degrade or swell rubber O-rings and plastic seals like petroleum-based lubricants do, ensuring long-lasting smooth operation for your plumbing fixtures. Verification: Verify that the lubricant tube explicitly states it is 100-percent silicone and designed for plumbing applications.
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