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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.




| ASIN | B0B7K698ZG |
| Best Sellers Rank | #59,139 in Automotive ( See Top 100 in Automotive ) #56 in Gasket Sealers |
| Brand | Akfix |
| Brand Name | Akfix |
| Color | Red |
| Compatible Material | Metal |
| Customer Reviews | 4.7 out of 5 stars 263 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 | 2.0 Count |
| Water Resistance Level | Waterproof |
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.
K**D
Excellent
Works like it should.
M**R
Good
Not much inside
Trustpilot
3 weeks ago
4 days ago