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๐ฅ Seal the heat, not your schedule!
Permatex 81630 Ultra Red High Temperature Gasket Maker is a professional-grade silicone sealant designed to withstand extreme temperatures up to 650ยฐF. Sensor-safe and OEM specified, it offers superior adhesion, flexibility, and resistance to oils and shop fluids. Ideal for high-temp repairs, this low-odor, non-toxic formula ensures a durable, reliable seal trusted by thousands of mechanics and DIY enthusiasts alike.











| ASIN | B08CRY2BJB |
| Best Sellers Rank | #78,748 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #86 in Fillers, Adhesives & Sealants |
| Brand | Permatex |
| Brand Name | Permatex |
| Colour | Ultra Red |
| Country of Origin | USA |
| Customer Reviews | 4.7 out of 5 stars 2,183 Reviews |
| Included Components | Ultra Red High Temperature Gasket Maker |
| Item Thickness | 0.2 Inches |
| Item Type Name | Permatex Ultra Red High Temperature Gasket Maker 3 oz |
| Item Weight | 0.21 Pounds |
| Manufacturer | Permatex |
| Material | Silicone |
| Material Type | Silicone |
| Model Number | 81630 |
| Part Number | 81630 |
| UPC | 686226816306 |
| Unit Count | 1.0 Count |
R**O
Excellent
Excellent
M**.
A good high-temp sealant.
Needed a quality product to seal a pass-through thermocouple in my electric smoker. Works perfectly.
L**Z
Excellent High-Temperature Gasket Maker That Seals Reliably
I used the Permatex Ultra Red 81630 on a high-heat automotive application, and it performed exactly as expected. It spreads easily, creates a strong, flexible seal, and handles high temperatures without cracking or shrinking. The curing process was straightforward, and once fully cured, it provided a leak-free seal. It's perfect for exhaust manifolds, headers, turbo components, and other high-temperature areas. The 3 oz tube is easy to use and provides enough material for several repairs. I would definitely buy it again for future automotive projects.
M**.
Great deal.
Good quality at a fair price.
J**Y
Red gasket tube that actually works
Trust this tube if your shop runs hot. I grabbed it for my espresso machine and a cranky space heater in the lobby. This stuff sticks, cures fast, and doesnโt stink up the front desk. I squeezed a thin bead, bolted things back together, and went right back to customers.
D**.
Worked well in high heat application
Great product
Trustpilot
3 weeks ago
3 weeks ago