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Akfix HT300 is a professional-grade red RTV silicone gasket maker designed for high-temperature applications up to 600°F. This flexible, waterproof sealant resists cracking, shrinking, and chemical damage, making it ideal for automotive valve covers and industrial sealing tasks. Sold in a convenient 2-pack, it offers durable, long-lasting performance trusted by DIYers and pros alike.




| Customer Reviews | 4.6 out of 5 stars 266 Reviews |
J**Y
Awsome price. Great product
Great price for high temp r.t.v. works great
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.
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
H**1
I would buy again good product
Good value for the money
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.
J**D
Good gasket seal
Very impressed with the performance of this product. Used it on a water pump and worked excellently.
M**R
Good
Not much inside
J**R
Have to use right away if opened and cap still hardens up
I've had two years and once opened and capped it goes bad so if you're not using it all at one time or within a month or two it's a waste of money otherwise it's good silicone
A**I
Ürün kaliteli
Daha önce kullandığım güvenilir ürün. Ürün tanıtımında 310ml görünen ürün 280ml olarak geldi.
Trustpilot
2 months ago
2 months ago