🔥 Seal the heat, own the street!
Permatex Optimum Red is a premium RTV silicone gasket maker engineered for extreme temperature endurance up to 750°F. Sensor-safe and OEM specified, it offers professional mechanics and serious DIYers a reliable, non-corrosive, and non-toxic solution for exhaust and turbocharger sealing that resists cracking, shrinking, and aging.
| ASIN | B08CRYCZ91 |
| Batteries | 1 Unknown batteries required. |
| Best Sellers Rank | #930 in Automotive ( See Top 100 in Automotive ) #4 in Gasket Sealers #86 in Oils & Fluids |
| Brand | Permatex |
| Color | Optimum Red |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,524) |
| Date First Available | June 20, 2020 |
| EU Spare Part Availability Duration | 5 Years |
| Exterior | Painted |
| Item Thickness | 0.2 Inches |
| Item Weight | 3.84 ounces |
| Item model number | 27038 |
| Manufacturer | Permatex |
| Manufacturer Part Number | 27038 |
| Material | Silicone |
| Model | Permatex Optimum Red High Temperature Gasket Maker 3.35 oz |
| Product Dimensions | 1.25 x 3.81 x 8 inches |
| UPC | 686226987631 686226270382 |
| Unit Count | 1.0 Count |
B**D
Hot Stuff.
This is a very good product that I have used for years re-building motors. Every new item they introduce is always a quality item. Really good for exhaust gasket sealer especially if you have older pitted exhaust headers.
J**K
Works amazing
This stuff is great. You must follow the instructions though. Don’t just apply and go.
A**R
Does what it should
Works Great
D**K
Best RTV ever
I don't a lot of engine rebuilds, I highly recommend this rtv. I've bought plenty and will continue buying this as long as I can. Worth the price.
J**N
Very hard to apply, would be better with a caulk gun.
Great product, but make sure you've worked on your grip strength to get this out of the tube. I actually cut a fairly large application port into the lid and it still took all my strength to get this to come out smoothly. Additionally, the metal tube eventually broke in the process before everything was applied. It makes a fantastic seal though and I feel confident that my oil pan gasket replacement will last for the remaining life of the car.
G**G
Excellent high temp rtv on manifold.
Used to seal exhaust manifold gasket on tractor. Several months with no leakage. If using on manifolds, just put a thin bead on both sides of gasket, just around the ports. Also used to seal exhaust studs on tractor that penetrated coolant jacket. No coolant leaks.
C**2
Good item
Very good quality, I'm always using this
S**K
Lock tight
Works great
J**N
I recently used the Permatex 27038 Optimum Red RTV Silicone to install my intake manifold, and I’m incredibly impressed with its performance! This silicone sealant was very simple to use, applying smoothly and evenly without any mess. It formed a strong, reliable seal that held up perfectly under high temperatures and pressure, ensuring my intake manifold installation was rock-solid. The product lived up to its promises, providing excellent adhesion and durability. I highly recommend this RTV silicone for any automotive sealing needs!
R**O
Excellent
S**Y
All good 👍
