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

Part No. 81878 Warranty  
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. Handles temperatures ranging from -75°F to 700°F intermittent and resists auto and shop fluids and vibration.
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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 15 reviews)

Ratings Distribution

  • 5 Stars

     

    (13)

  • 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 (11)
  • Can withstand use (9)
  • Reliable (9)
  • Compact (4)

Cons

    Best Uses

    • Home garage (10)
    • Automotive repair shop (7)
    • Roadside repairs (6)
    • Upkeep (6)
      • Reviewer Profile:
      • Mechanic (6), Auto enthusiast (5), Casual driver (4), Truck enthusiast (4)

    Most Liked Positive Review

     

    Worked well on crankcase for 5hp briggs

    It dried fast and it stopped the oil leak on my 5hp briggs and stratton engine. Super easy too.

    It dried fast and it stopped the oil leak on my 5hp briggs and stratton engine. Super easy too.

    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 15 customers

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    Displaying reviews 1-10

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    5.0

    Worked as expected

    By Pete

    from New York

    Verified Buyer
    3 or more reviews submitted

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

    Worked as expected

    Comment on this review(earn points)

     
    5.0

    Only one to choose

    By James

    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 review(earn points)

       
      5.0

      The only RVT I use.

      By yep

      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 review(earn points)

        (1 of 3 customers found this review helpful)

         
        5.0

        WORKS GREAT EVERYTIME.

        By RIC

        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 review(earn points)

        (1 of 2 customers found this review helpful)

         
        5.0

        Good Gasket Maker

        By Snowman

        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 review(earn points)

        (1 of 2 customers found this review helpful)

         
        5.0

        No other gasket maker will do.

        By Ray

        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 review(earn points)

          (1 of 2 customers found this review helpful)

           
          5.0

          Great Small Engine Product

          By Matt

          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 review(earn points)

            (1 of 2 customers found this review helpful)

             
            5.0

            Transmission pan gasket Maker

            By Fred

            from Saint Cloud, FL

            About Me Casual Driver, Diyer

            Pros

            • Can Withstand Use
            • Easy To Use
            • No Need Other Gasket
            • Reliable

            Cons

              Best Uses

              • Automotive Repair Shop
              • Gasket Maker
              • Home Garage

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

              Use as transmision pan gasket. No need to buy or use rubber or cork gasket.

              Comment on this review(earn points)

              (1 of 3 customers found this review helpful)

               
              5.0

              This stuff is Great!!!!!

              By kjhs

              from Altoona, PA

              About Me Auto Enthusiast

              Ask me a question

              Verified Buyer
              Level 5

              Pros

              • Can Withstand Use
              • Easy To Use
              • Reliable

              Cons

                Best Uses

                • Home Garage
                • Roadside Repairs
                • Upkeep

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

                If your not welding exhaust pipe, and your using clamps then pick up a tube of this. Copper seal handles the heat extremely well and ensures that your joints will not leak.

                Comment on this review(earn points)

                (9 of 21 customers found this review helpful)

                 
                4.0

                Good exhaust sealer!

                By DSMer

                from Mid Ga

                About Me Mechanic

                Ask me a question

                Level 10

                Pros

                • Can Withstand Use
                • Compact Design
                • 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):

                  I have used this for years! It is good stuff! Use with a gasket to ensure sealing!DOES NOT BURN UP!

                  Comment on this review(earn points)

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

                   

                  Ask a question, get answers from real customers and in-house experts. Or contact Customer Care by email or call 1-877-238-2623.

                  2 Questions | 3 Answers
                  Displaying questions 1-2
                  • 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.

                    1 answer

                    • 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

                    • 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
                    • 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
                  Displaying questions 1-2

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