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🔥 Seal the heat, flex the power – never settle for less!
Akfix HT300 High Temp Silicone Gasket Maker is a professional-grade, red RTV sealant designed to endure extreme temperatures up to 600°F. Its flexible, durable formula resists cracking, shrinking, and chemical damage, making it ideal for automotive valve covers and various high-heat sealing applications. Available in a convenient 2-pack, it’s the go-to choice for both DIY enthusiasts and professionals seeking reliable, long-lasting gasket seals.




| ASIN | B0B7K698ZG |
| Best Sellers Rank | #79,378 in Automotive ( See Top 100 in Automotive ) #64 in Gasket Sealers |
| Brand | Akfix |
| Brand Name | Akfix |
| Color | Red |
| Compatible Material | Metal |
| Customer Reviews | 4.7 out of 5 stars 276 Reviews |
| Included Components | 2 Qty Silicone Sealant |
| Item Dimensions | 3.92 x 3.92 x 9.05 inches |
| Item Form | Liquid |
| Item Weight | 10.5 ounces |
| Item dimensions L x W x H | 3.92 x 3.92 x 9.05 inches |
| Manufacturer | Akfix |
| Material | Silicone |
| Material Type | Silicone |
| Model | Akfix HT300-2 Pack-FBA |
| Number of Items | 2 |
| Part Number | Akfix HT300-2 Pack-FBA |
| Style | Industrial |
| Style Name | Industrial |
| Surface Recommendation | Door |
| UPC | 767023853098 |
| Unit Count | 2 Count |
| Water Resistance Level | Waterproof |
K**N
I needed to think it through before I opened it up.
This was the first time I used this type of dispenser, and I screwed up opening the first one. So I'm really glad I bought a 2 pack. 😁 the gasket worked great on my Jeep.
J**Y
Awsome price. Great product
Great price for high temp r.t.v. works great
G**N
Favorite gasket maker
I love this stuff.... I use it on just about everything. It does exactly what they say it does and its cheap. Ive had problems with some of their competitors products in the past but never with this stuff..... the tubes also come with a reusable cap which is really nice..... the longest Ive kept a capped opened tube of this stuff laying around was about 6 months and it was still in the same usable condition as the day I opened it. I recommend some disposable gloves and some caution while using it though because that red wants to get on everything and it sticks good as long as the surface isnt wet
J**D
Good gasket seal
Very impressed with the performance of this product. Used it on a water pump and worked excellently.
W**D
Works well.I prefer the RTV silicone gold for real high temp
This is a good basic gasket maker, especially if the area you need to cover is large. I prefer using a metal gasket and putting this sealant on both sides of the gasket. Except for the valve covers, I use rubber gaskets and put this sealant on both sides. Works well to stop oil leaking from pans and covers.
H**1
I would buy again good product
Good value for the money
R**O
Best high temp RTV I ever used!
Used this on commercial smoker centrifugal upblast exhaust fan chimney and fire box chimney to seal the vent pipe. It adhered and cured very well, and quickly. It exhibits excellent adhesion, even after high temp exposure. I like the fact that it comes with a screw on cap to preserve unused RTV for later use. Smart! Excellent value.
K**D
Excellent
Works like it should.
A**I
Ürün kaliteli
Daha önce kullandığım güvenilir ürün. Ürün tanıtımında 310ml görünen ürün 280ml olarak geldi.
Trustpilot
5 days ago
3 days ago