Positively stops oil leaks while you drive!

TriSeal Makes a permanent seal and prevents future leaks

TriSeal Seals power steering units, automatic transmissions, and engine main bearing leaks

TriSeal softens and revitalizes hard, shrunken, worn seals to original condition and prolongs the life of all seals to prevent future leaks. The detergent action of TriSeal eliminates the slipping of automatic transmissions caused by varnish build-up.  Engine main bearing leaks are positively sealed in 5 hours.  Approved by manufacturers of transmissions and transmission fluids.  TriSeal has a proven history of success since 1960.


Shake briefly and add as follows:

Use 16 oz. bottle to treat leaks in oil capacity up to 8 quarts for:

  • Automotive Engines
  • Marine Engines
  • Automatic Transmissions
  • Diesel Engines
  • Road Grader and Dozer Hydraulic Pumps

Use 1/2 bottle (8oz) in:

  • Power Steering
  • Rack and Pinion
  • Differentials and Rear Axles
  • Hydraulic Cylinders (Snow Plows Hoists)
  • Refillable Shock Absorbers

Use 4 oz. in:

  • Gear Cases
  • Reduction Gears
  • Transfer Cases
  • Trim Tabs
  • Porter Power
  • Arbor Presses
  • Hydraulic Jacks
  • Pillow Blocks

Dab with cotton swab on:

  • Roof Vent Gaskets
  • Door Weatherstripping
  • Hatch Gaskets

*Do NOT use in Brake Systems

Product No. 216

Made In Michigan!


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