Hello, could you please provide the NSF certificate for this item?

Dear, our NSF registration number is No.146038, you can check on the official website.

is this grease safe for plastic and fountain pens?

Yes. No problems in my 40+ years experience.

Can this be used on threaded connections instead of plumbers tape to prevent leaks?

This is not used to seal FPT (female pipe taper) and MPT (male pipe taper) plumbing pipe threads to prevent leaks. This is a lubricant that is primarily used on neoprene, butyl, nitrile, EPDM, etceteras, o-rings and gaskets. The lubricant assist in assembly and helps prevent bunching of the seal material as it is being tighten. It also aids in making a contact sealing surface for the o-ring and gasket. Examples where it might be use: sink/tub faucet valve stem, the o-ring on a PVC union or PVC union ball valve, etceteras. There are other pipe sealants that can be use to seal tapered threaded pipes like "Oatey White Pipe Joint Compound", "Highside Leak Lock Pipe Joint Sealant", "Permatex Thread Sealant with PTFE".

What is the percent of silicone in this product?

There is no information provided on the product packaging. All silicone greases are composed of silicone oil, PDMS, and a thickening agent, usually amorphous fumed silica, to make the oil into a grease. The exact proportions of the two may be proprietary info, so you would have to contact the mfr directly.

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KEZE Silicone Grease Waterproof Food Grade Silicone Sealant Lubricant for Plumbers Valve Faucet O Rings 1 oz 3-Pack

KEZE Silicone Grease Waterproof Food Grade Silicone Sealant Lubricant for Plumbers Valve Faucet O Rings 1 oz 3-Pack

Product ID: 512154004

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Details

Material
Silicone
Brand
Keze
Package Information
Tube
Liquid Volume
1 Fluid Ounces
Item Weight
1 Ounces

💧Waterproof & oxidation resistant

🧴Food grade NSF approved

🌡️Temp stable -40° to 400°F

Description

🔧 Seal the deal with KEZE – where plumbing meets precision!

MULTI SURFACE MASTERY - Versatile lubricant and sealant for faucets, valves, O-rings, gaskets, and even scuba gear—one product, endless fixes.
LONG LASTING FRICTION REDUCTION - High raw silicone content delivers smooth operation and extends the life of hard-turning faucets and valves.
SAFE FOR DRINKING WATER SYSTEMS - NSF-approved, odorless, and colorless formula ensures zero chemical contamination—pure peace of mind.
ULTIMATE TEMPERATURE RESILIENCE - Maintains perfect consistency from freezing cold to scorching heat (-40° to 400°F) for reliable performance.
WATERPROOF OXIDATION RESISTANT - Keeps your plumbing components protected and lubricated against moisture and wear for lasting durability.

KEZE Silicone Grease is a premium, NSF-approved food-grade lubricant and sealant designed for plumbing professionals and DIYers alike. It withstands extreme temperatures (-40° to 400°F), resists water and oxidation, and ensures smooth operation of faucets, valves, O-rings, and gaskets. This odorless, colorless grease guarantees safe use in drinking water systems while providing long-lasting lubrication and protection.

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