Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz)
Hover over the image to zoom in
Share this:

Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz)

Part No. 81878/82160 Warranty Details  
OEM specified. Highest operating temperatures for 4-cylinder, turbocharged or high-performance engines. Sensor-safe, low odor, noncorrosive. Superior adhesion. Three times more oil resistant than conventional silicones and 8 times more flexible than cut gaskets.
Back To Top
Container Size (oz.):3
Container Type:Tube
Dosage:Multi
Primary Use:Gasket Maker
Temperature Range (°F):-75 - 700

REVIEW SNAPSHOT®

by PowerReviews
PermatexUltra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz)
 
4.8

(based on 18 reviews)

Ratings Distribution

  • 5 Stars

     

    (16)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to use (12)
  • Can withstand use (10)
  • Reliable (10)
  • Compact (4)

Cons

No Cons

Best Uses

  • Home garage (12)
  • Automotive repair shop (7)
  • Roadside repairs (6)
  • Upkeep (6)
    • Reviewer Profile:
    • Mechanic (7), Casual driver (6), Auto enthusiast (5), Truck enthusiast (4)

Most Liked Positive Review

 

ultra copper RTV

I bought new exhaust manifold gaskets and valve cover gaskets, I've installed the valve cover gaskets and i clean the surface off on the engine block and the valve cover, make sure you get...Read complete review

I bought new exhaust manifold gaskets and valve cover gaskets, I've installed the valve cover gaskets and i clean the surface off on the engine block and the valve cover, make sure you get all the oil around the edges that meet with the gaskets for a good seal/bond. take the Ultra copper RTV and puut it on the cover, then press the gaskets onto the cover in place lined up with the screw holes, then apply the rtv around the engine block where the gasket contacts it. (warning, don't get any RTV in your valves!) , get the cover back on, hand tighten, (don't over tighten if you are using rubber or cork gaskets, it'll squeeze them and break them) wait an hour, and do about a 1/2 turn on all your screws to get them fairly snug, wait 24 hours before you drive your car/truck, when you drive your car for a few minutes tighten your screws again, the heat/vibration may make them come loose, don't put the rtv on really heavy, some will squeeze out thats fine, but on an 8 cylinder it only took about 1/3- 1/2 a tube to do both valve covers. thanks for reading hope this helps!

VS

Most Liked Negative Review

 

Gasket sealer to the Max!

I liked that it did what i needed it to do but am still in the testing phase.would recommend it to anyone.

I liked that it did what i needed it to do but am still in the testing phase.would recommend it to anyone.

Reviewed by 18 customers

Displaying reviews 1-10

Back to top

Previous | Next »

 
5.0

Copper...my favorite

By 

from Griffin, Ga

Verified Buyer
3 or more reviews submitted

Pros

  • High temp and best all around

Cons

    Best Uses

      Comments about Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz):

      All of the best attributes of a RTV sealer in one tube. It is the only rtv I use for all my repairs requiring a sealer.

      Comment on this reviewHelp Icon(earn points)

       
      5.0

      permatex gasket maker

      By 

      from dickson tn

      About Me Casual Driver, Mechanic

      Verified Buyer
      3 or more reviews submitted

      Pros

      • Can Withstand Use
      • Easy To Use
      • Reliable

      Cons

        Best Uses

        • Home Garage

        Comments about Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz):

        product is very durable and works as recommended

        Comment on this reviewHelp Icon(earn points)

        (1 of 1 customers found this review helpful)

         
        5.0

        Great Stuff

        By 

        from Eagle Lake, FL

        About Me Casual Driver

        Verified Buyer
        3 or more reviews submitted

        Pros

          Cons

            Best Uses

            • Home Garage

            Comments about Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz):

            Used this on my inboard boat exhaust manifolds. It would leak with a gasket only. Added Copper RTV and the leak stopped.

            Comment on this reviewHelp Icon(earn points)

            (0 of 1 customers found this review helpful)

             
            5.0

            Worked as expected

            By 

            from New York

            Verified Buyer
            Level 3

            Comments about Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz):

            Worked as expected

            Comment on this reviewHelp Icon(earn points)

             
            5.0

            Only one to choose

            By 

            from Saint Marys, PA

            About Me Auto Enthusiast, Mechanic, Truck Enthusiast

            Ask me a question

            Verified Buyer
            Level 3

            Pros

            • Can Withstand Use
            • Easy To Use
            • Reliable

            Cons

              Best Uses

              • Automotive Repair Shop
              • Home Garage
              • Roadside Repairs

              Comments about Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz):

              Many options to choose from. This one covers almost all applications and eliminates the need to have multiple purchases.

              Comment on this reviewHelp Icon(earn points)

               
              5.0

              The only RVT I use.

              By 

              from wv

              About Me Mechanic

              Ask me a question

              Verified Buyer
              Level 4

              Pros

              • Reliable

              Cons

                Best Uses

                • Automotive Repair Shop
                • Home Garage
                • Roadside Repairs
                • Upkeep

                Comments about Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz):

                I use this RVT from building motors, to repairing leaking radiators.

                Comment on this reviewHelp Icon(earn points)

                (1 of 5 customers found this review helpful)

                 
                5.0

                WORKS GREAT EVERYTIME.

                By 

                from LAUREL HILL, NC

                About Me Auto Enthusiast, Casual Driver, Competitive Driver, Hot Rod Enthusiast, Mechanic, Truck Enthusiast

                Ask me a question

                Verified Buyer
                Level 3

                Pros

                • Can Withstand Use
                • Compact Design
                • Easy To Use
                • Great Gasket Maker
                • Reliable

                Cons

                • No Complaints

                Best Uses

                • Automotive Repair Shop
                • Great Sealant
                • Home Garage
                • Roadside Repairs
                • Upkeep

                Comments about Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz):

                THIS IS ONE GREAT PRODUCT OF ALOT OF PRODUCTS THAT PREMATEX MAKES. IT DOES WHAT IT IS SUPPOSE TO DO. IT SEALS AND MAKES A GREAT GASKET FOR ALL THOSE TIMES YOU DON'T HAVE THE GASKET FOR THE JOB, WELL PREMATEX HAS IT FOR YOU. IT WILL NEVER LET YOU DOWN. AND IT COMES IN ALL TYPES OF TEMPERATURE AND STRENGTHS. AND IT IS EASY FOR ANYONE TO USE. IT HAS SIMPLE INSTRUCTIONS TO FOLLOW AND CARRYS A GREAT QUARANTEE. WHAT MORE COULD YOU ASK FOR. IT PROVIDES, PROTECTS, MAKES AND SEALS WHATEVER YOUR NEED IS PREMATEX HAS IT FOR YOU.

                Comment on this reviewHelp Icon(earn points)

                (2 of 3 customers found this review helpful)

                 
                5.0

                Good Gasket Maker

                By 

                from VA

                About Me Casual Driver

                Verified Buyer
                Level 3

                Pros

                • Easy To Use
                • Seems durable

                Cons

                • None

                Best Uses

                • Home Garage

                Comments about Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz):

                I used this gasket maker on my truck. It seems durable after it dries, but this is my first time using it. It is sensor safe, and can withstand temps up to 700 degrees.

                Comment on this reviewHelp Icon(earn points)

                (1 of 2 customers found this review helpful)

                 
                5.0

                No other gasket maker will do.

                By 

                from Oak Ridge, TN

                About Me Casual Driver

                Verified Buyer
                3 or more reviews submitted

                Pros

                • Can Withstand Use
                • Easy To Use
                • Reliable

                Cons

                  Best Uses

                  • Automotive Repair Shop
                  • Home Garage
                  • Roadside Repairs
                  • Upkeep

                  Comments about Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz):

                  Heads above any other product including from this same manufacturer.

                  Comment on this reviewHelp Icon(earn points)

                  (1 of 2 customers found this review helpful)

                   
                  5.0

                  Great Small Engine Product

                  Profile Image

                  By 

                  from Danielsville, PA

                  About Me Mechanic

                  Ask me a question

                  Level 5

                  Pros

                  • Easy To Use
                  • Small Engine Head Gasket

                  Cons

                    Best Uses

                    • Small Engine Exhaust Seal
                    • Small Engine Head Gasket

                    Comments about Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz):

                    I've used this product for both sealing flat-head small engines as well as sealing a tecumseh 2-stroke snowblower muffler system from spraying the whole unit with exhaust oil. Great stuff!

                    Comment on this reviewHelp Icon(earn points)

                    Displaying reviews 1-10

                    Back to top

                    Previous | Next »

                    Do you have questions about this product?(earn points for answers!)

                     

                    Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

                    3 Questions | 5 Answers
                    Displaying questions 1-3
                    • Q:

                      Can this replace -- or enhance -- the gasket between the muffler and a small engine (garden tractor)? The standard metal one rusted out (not the first time). Tried the red hi-temp insta-gasket (different brand), but it began to smoke in short order.
                      Asked on 3/16/2016 by Ugh, repairs... from Upstate NY

                      1 answer

                      • CUSTOMER CARE

                        A:

                        Hi, glad to assist you! This Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker (3 oz) (Part No. 81878/82160) is a most advanced high temperature RTV silicone gasket. Three times more oil resistant than conventional silicones; eight times more flexible than cut gaskets. The temperature range is -65°F to 700°F (-54°C to 371°C) intermittent; resists auto and shop fluids and vibration. Suggested Applications: Exhaust manifolds/headers, valve covers, oil pans, timing covers, water pumps, thermostat housings.

                        Answered on 3/17/2016 by Steve from AAP
                    • Q:

                      For a valve cover which of the two would recommend 1) ultra copper or 2) ultra black
                      Asked on 4/2/2014 by JohnJohn from N.c.

                      2 answers

                      • A:

                        For future reference to help other folks on here, for any engine cover that does not use a seal, or for 3 point areas where seals meet such as a front engine cover gasket meeting an oil pan gasket, I always use ultra gray. Very rarely do I have a use for blue or black silicone.

                        Answered on 7/7/2014 by Bill J from Greenup, KY
                      • CUSTOMER CARE

                        A:

                        Hi John, I'm glad to assist you! Permatex makes a product called Ultra Black (Part No. 82180). It should work well for your application. Here is the link of this part -

                        Answered on 4/4/2014 by Vincent from AAP
                    • Q:

                      can i use this on a water pump? the gasket that came with the water pump is a rubber gasket. can i use this in addition to the rubber gasket or better with only the rubber gasket?
                      Asked on 7/25/2012 by jorge from san antonio, tx

                      2 answers

                      • CUSTOMER CARE

                        A:

                        This part Permatex Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, Part No. 81878 is a single component, room temperature vulcanizing gasketing compound designed to provide reliable “formed-in-place” gaskets for mechanical assemblies. This material cures on exposure to moisture in the air to form a tough, flexible, silicone rubber gasket. The product resists aging, weathering and thermal cycling without hardening, shrinking or cracking. Designed for the higher temperature environments encountered in 4-cylinder, turbocharged, and high performance engines. PRODUCT BENEFITS: • High temperature resistance, • Sensor safe, non-corrosive, • Superior adhesion and flexibility, • Replaces most cut gaskets, • Improved oil resistance, • Can be used as a gasket maker or dressing, • Non-flammable, Non-toxic, • Low odor, TYPICAL APPLICATIONS: • Exhaust manifolds, • Thermostat housings, • Valve covers, • Timing gear covers, • Water pumps, • Differential covers., DIRECTIONS FOR USE: FOR ASSEMBLY AS FORM-IN-PLACE GASKET: 1. Remove all previous material from mating surfaces., Permatex Silicone Stripper or Gasket Remover is recommended for most materials., 2. For best results, clean and dry all surfaces with a residue-free solvent, such as Permatex Brake and Parts Cleaner., 3. Cut nozzle to desired bead size, 1/16 “ to 1/4 “ in diameter. An 1/8” bead is usually sufficient for most applications., 4. Remove cap, puncture tube or cartridge seal and attach extension nozzle., 5. Apply a continuous and even bead of silicone to one surface, first tracing the internal areas of the gasket configuration, then all surrounding bolt holes., 6. Assemble parts immediately while silicone is still wet. Secure or tighten to recommended torque specs., 7. Re-torque will not be necessary after the product has cured., FOR ASSEMBLY AS GASKET DRESSING: 1. Repeat steps 1 thru 4 as in previous section., 2. Apply a thin film of silicone to one surface to be sealed., 3. Place the pre-cut gasket onto silicone film., 4. Apply a second thin to pre-cut gasket surface., 5. Remove any excess and assemble parts immediately., Note: Product not recommended for use as a cylinder head gasket or head gasket sealant., INSTRUCTIONS FOR POWERBEAD: 1. Clean and dry all flange surfaces to be sealed., 2. Remove black cap from top of extension nozzle., 3. Turn nozzle extension one complete turn (360°) counterclockwise., 4. Depress finger trigger and apply a continuous 1/16 inch to 1/8 inch PowerBead to one surface., 5. Assemble parts immediately while silicone is still wet., 6. Finger tighten flange only until material begins to seep out the sides of the flange., 7. Allow to set for at least two hours and re-torque at least one quarter to one half turn., 8. For best results, allow to cure overnight., 9. To close, turn extension nozzle clockwise until tight (about one full turn). Wipe off excess material from nozzle and replace black cap.
                        For any further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and our representatives would be more than happy to assist you.

                        Answered on 7/25/2012 by Aaron from AAP
                      • A:

                        Gasket only for the water pump. You would use this if you were making a gasket for the upper radiator hose nipple. You may also use this for the humps on the ends of the valve cover.

                        Answered on 6/26/2013 by Vapor from Monroe, GA
                    Displaying questions 1-3

                    Do you have a question about this product? 

                    Create or view your online garage

                    Check out the specials in our monthly flyer.

                     
                     
                    Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.