

🖤 Seal it like a pro—black silicone strength that lasts through heat, weather, and time!
The Silicone RTV 4500 is a premium FDA-grade black silicone sealant designed for high-strength, high-temperature applications up to 350°F. Its versatile bonding capability works on most surfaces, making it ideal for automotive, appliance, and food-contact uses. Weather-resistant and self-curing, this 2.8 fl.oz tube delivers a reliable, long-lasting seal that professionals trust to restore and protect critical components.
| Customer Reviews | 4.4 out of 5 stars 924 Reviews |
S**L
good stuff
The smell is horrid, but silicone curing usually is. That said it worked great as "gasket maker" for a large broken silicone o-ring on a stainless steel water pipe fitting.
A**R
Excellent product, works as advertised!
Used this to fill the leaks around my chimney and fire box on my 15 year old New Braunfels smoker. Thing works like it's brand new. Had been loosing smoke and control of the temperature. Have put about 15 cooks on it since using the product. 6 or 7 big grilling cooks with high temps and the rest 10-15 hour long smokes for briskets, ribs, and pork loins. Used Lavaloc gasket material and this leak sealer, loosing almost no smoke and have perfect control of the temperature again. Looks like my old smoker I almost gave up on, will last another 15 years. Great product!!
H**S
Works
This was bought to adhere a fridge door seal which would not stop coming off. It works well and the seal has not displaced since the sealant was used.
G**O
Funciona.
Buen producto, cumplió la función en debida forma!
S**R
Food safe is misleading, for most people's usage
I got this to rig up a seal on an aging keurig and it worked ok, but I did some research into "food grade" silicone shortly after and this description is misleading. This product has a rating of NSF 51, which means it's safe for "incidental" food contact, i.e. brief. For a product that will be operating in a wet environment in continuous food contact, or immersed in liquid (which a lot of people are getting this for) you want NSF 61 rated products. Feel free to look it up if you want more information, there's plenty out there. Everyone can't be expected to know about every safety standard, and do all the research, when companies expect us to take everything at face value.
J**N
Probably the best of it's type that I have ever used
Dries very sturdy and firm but flexible. Very good grade of caulk. Will never buy any other kind as long as I can find this.
D**N
It works!
Used it where very dark green granite counter top meets the same backsplash and also dark stained wood. It covered about 25 linear feet. I should say my very hesitant son did the work his first time and it turned out great. Probably the first time he's caulked anything, he's an apartment dweller.
G**O
High Temperature and Food Safe sealant.
I have assembled together with this sealant four peaces of the broken lid of my donabe (Japanese soup pot made of clay).
Trustpilot
2 months ago
2 months ago