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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🛠️ Keep your fixtures flawless—lubricate like a pro, avoid the drip drama!

NSF FOOD GRADE SAFETY - Odorless, colorless, and chemical-free for drinking water peace of mind
VERSATILE WATERPROOF SEALANT - Ideal for faucets, valves, gaskets, scuba gear, and more—one tube, endless fixes
EXTREME TEMPERATURE STABILITY - Maintains perfect consistency from freezing cold to scorching heat
PROFESSIONAL GRADE RELIABILITY - Trusted by plumbers for leak repairs and maintenance on critical components
LONG LASTING FRICTION REDUCTION - High silicone content ensures smooth faucet operation and durable lubrication

Keze's Faucet O-Ring Silicone Lubricant is a premium NSF-approved, food-grade silicone grease designed for professional plumbing and mechanical use. It withstands extreme temperatures (-40° to 400°F), resists water and oxidation, and provides long-lasting lubrication for faucets, valves, gaskets, and more. Safe for nitrite rubber O-rings and odorless, this multi-purpose paste ensures smooth operation and leak-free performance in every application.

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TrustScore 4.5 | 7,300+ reviews

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Customer service was outstanding when I had questions about the product.

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Material	Silicone
Brand	Keze
Package Information	Tube
Liquid Volume	1 Fluid Ounces
Item Weight	1 Ounces
Recommended Uses For Product	Mechanical
Upper Temperature Rating	4E+2 Degrees Fahrenheit
Specific Uses For Product	Plumbing, Waterproofing, Lubrication
Item Form	Paste
Manufacturer	keze
Net Quantity	1.0 count
UPC	655365167310
Number of Items	3
Model number	001
Colour	Silicone Grease
Item Weight	28.3 g
Package Dimensions	13.31 x 10.31 x 3.3 cm; 28.35 g
Item model number	001

Faucet O-Ring Silicone Lubricant |Plumber Grease (3)

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