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Red RTV silicone gasket maker in 11.1 oz cartridge

Pro-Seal

Pro-Seal 80728 RTV Silicone Gasket Maker 11.1 oz

SKU CH-V46A-CQASG

Red RTV silicone gasket maker withstands -70 °F to 600 °F and fills gaps up to 0.25 in

  • Low volatility formula meets California Prop 65 compliance
  • Withstands -70 °F to 600 °F for extreme engine heat
  • 10-minute work time allows precise gasket placement
  • Fills gaps up to .25 in on metal surfaces
  • 1 oz cartridge provides enough paste for multiple repairs

High-Temperature RTV Silicone Gasket Maker

Pro-Seal 80728 is a red acetoxy silicone paste designed for metal sealing applications. The cartridge delivers 11.1 oz of sensor-safe material that resists oil and extreme temperatures. It suits mechanics and technicians forming custom gaskets on engine components.

Room-Temperature Cure With Limited Working Window

The compound cures fully in one day at ambient conditions but offers only a 10-minute working time after dispensing. Maximum gap fill is 0.25 in, so wider joints require shimming or a different sealing method. The acetoxy chemistry releases acetic acid vapour during cure, which can corrode sensitive electronics nearby.

600 °F Maximum Operating Temperature

Continuous exposure above this limit will degrade the seal and risk leakage. The product remains flexible down to -70 °F, covering most automotive and industrial thermal cycles. Buyers needing higher sustained heat resistance must select a different chemistry.

How it compares

Measured against everything we stock in Caulking & Sealing Supplies, at today’s prices. Recalculated every night.

Price $12.99
Cheaper than about 63% of the 631 comparable items (median $16.99).

Specifications

Product
Brand namePRO SEAL

Questions about this item

How do I pick the right Pro-Seal 80728 cartridge for my job?

The Pro-Seal 80728 comes in a single 11.1 oz cartridge, so you simply buy the quantity that matches the total gap volume you need to fill.

What does the 600 Degrees F rating mean when the sealant is in an engine?

The cured silicone remains stable up to 600 Degrees F and down to -70 Degrees F, so it handles exhaust heat and cold starts without breaking down.

What does the acetoxy silicone chemistry limit in real use?

Acetoxy cure releases acetic acid vapour during the 10 minute working time and 1 day full cure, so avoid using it on acid-sensitive electronics or bare copper surfaces.

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