









- Stock: In Stock
- Model: 81630
- SKU: 81630
- ISBN: B08CRY2BJB
Available Options
- High temperature performance, adhesion and flexibility
- OEM Specified, Sensor-safe, low odor, non-corrosive
- Non-flammable, non-toxic
- Can be used as a gasket maker or dressing and meets performance specs of OE silicone gaskets
- Withstands up to 650°F (399°C) intermittent
From the brand

Featured Products
Permatex is a leading manufacturer and distributor of premium chemical products to the automotive maintenance and repair, home and hardware markets. Product categories include gasket makers, sealants, hand cleaners, threadlockers, adhesives, cleaners, repair kits, and lubricants.
Permatex is a leading automotive chemical manufacturer for both professionals and DIY'ers.
Gasket Makers
Visit the Store
Thread Compounds
Visit the Store
From the manufacturer


Permatex’s Ultra Red offers high temperature resistant available today. Ultra Red is a high-performance low-odor formulation, outperforming the previous gen. Red RTV. Ultra Red resists temperatures up to 650°F (343°C). This high temperature gasket maker is resistant to high thermal cycling and is sensor-safe, non-corrosive RTV. This chemical gasket maker can be used in replacement of pre-cut gaskets and is ideal for high-temperature applications such as the exhaust manifold, header, turbochargers and slip-fit exhaust parts.
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Permatex Ultra Red RTV is a low odor, sensor safe, non-corrosive formula that is resistant to most common shop fluids and meets performance specifications of OE silicone gaskets. | Permatex Ultra Red is designed to be used on areas where you need a temperature and heat resistant silicone gaskets. Common Applications include header, manifold, slip-fit exhaust parts, turbochargers | Permatex Ultra Red is a high temperature resistant gasket maker that withstands temperatures up to 650°F and eliminates the need for pre-formed, pre -cut gaskets. |
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Ultra Red | Ultra Black | Ultra Grey | |
Cure Time | 8 Hours | 8 Hours | 8 Hours |
Feature | High Temperature and Thermal Cycling | Flexible and Oil Resistant | High Torque and Vibration Resistant |
Applications | Header, Manifold, Slip-Fit Exhaust Parts, Turbochargers | Oil pans, timing covers, transmission pans, differential covers | Valve covers, water pump, intake manifold end seals, thermostat housings |
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Ultra Red | Optimum Red | The Right Stuff 90 Minute Red | The Right Stuff 1 Minute Red | |
Cure Time | 8 Hours | 8 Hours | 90 Minutes | 1 Minute |
Feature | High Temperature and Thermal Cycling | Max Temperature and Thermal Cycling | 90 Minute Cure | Fastest Return to Service |
Applications | Header, Manifold, Slip-Fit Exhaust Parts, Turbochargers | Header, Manifold, Slip-Fit Exhaust Parts, Turbochargers | Header, Manifold, Slip-Fit Exhaust Parts, Turbochargers | Header, Manifold, Slip-Fit Exhaust Parts, Turbochargers |
From the brand

Featured Products
Permatex is a leading manufacturer and distributor of premium chemical products to the automotive maintenance and repair, home and hardware markets. Product categories include gasket makers, sealants, hand cleaners, threadlockers, adhesives, cleaners, repair kits, and lubricants.
Permatex is a leading automotive chemical manufacturer for both professionals and DIY'ers.
Gasket Makers
Visit the Store
Thread Compounds
Visit the Store
From the manufacturer


Permatex’s Ultra Red offers high temperature resistant available today. Ultra Red is a high-performance low-odor formulation, outperforming the previous gen. Red RTV. Ultra Red resists temperatures up to 650°F (343°C). This high temperature gasket maker is resistant to high thermal cycling and is sensor-safe, non-corrosive RTV. This chemical gasket maker can be used in replacement of pre-cut gaskets and is ideal for high-temperature applications such as the exhaust manifold, header, turbochargers and slip-fit exhaust parts.
|
|
|
---|---|---|
Permatex Ultra Red RTV is a low odor, sensor safe, non-corrosive formula that is resistant to most common shop fluids and meets performance specifications of OE silicone gaskets. | Permatex Ultra Red is designed to be used on areas where you need a temperature and heat resistant silicone gaskets. Common Applications include header, manifold, slip-fit exhaust parts, turbochargers | Permatex Ultra Red is a high temperature resistant gasket maker that withstands temperatures up to 650°F and eliminates the need for pre-formed, pre -cut gaskets. |
![]() |
![]() |
![]() | |
---|---|---|---|
Ultra Red | Ultra Black | Ultra Grey | |
Cure Time | 8 Hours | 8 Hours | 8 Hours |
Feature | High Temperature and Thermal Cycling | Flexible and Oil Resistant | High Torque and Vibration Resistant |
Applications | Header, Manifold, Slip-Fit Exhaust Parts, Turbochargers | Oil pans, timing covers, transmission pans, differential covers | Valve covers, water pump, intake manifold end seals, thermostat housings |
![]() |
![]() |
![]() |
![]() | |
---|---|---|---|---|
Ultra Red | Optimum Red | The Right Stuff 90 Minute Red | The Right Stuff 1 Minute Red | |
Cure Time | 8 Hours | 8 Hours | 90 Minutes | 1 Minute |
Feature | High Temperature and Thermal Cycling | Max Temperature and Thermal Cycling | 90 Minute Cure | Fastest Return to Service |
Applications | Header, Manifold, Slip-Fit Exhaust Parts, Turbochargers | Header, Manifold, Slip-Fit Exhaust Parts, Turbochargers | Header, Manifold, Slip-Fit Exhaust Parts, Turbochargers | Header, Manifold, Slip-Fit Exhaust Parts, Turbochargers |