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Blue paste gasket sealant in 80 mL tube

Loctite

Loctite 270642 Shrink-Resistant Gasket Sealant 80 mL

SKU CH-VD62-SG7D8

Shrink-resistant paste coats precut gaskets, cures at room temperature in one day, and withstands -65 °F to 500 °F

  • Shrink-resistant formula maintains seal integrity on precut gaskets
  • Ready for reassembly in 10 minutes working time
  • Withstands extreme heat up to 500 °F operating temperature
  • Remains flexible down to -65 °F for cold starts
  • Sensor-safe composition protects oxygen sensors and catalytic converters

Product Purpose

Loctite 270642 is a shrink-resistant gasket sealant designed for automotive repair and maintenance. It coats precut gaskets to create reliable seals in engines and fluid systems. Mechanics and DIY technicians use it where high-temperature resistance and sensor-safe performance are required.

Application Constraints

The paste cures at room temperature and reaches full strength after one day. Working time is 10 minutes before the material begins to set. It operates continuously between -65 °F and 500 °F, limiting use to environments that stay within this range. The formula resists alcohol, anti-freeze and common automotive fluids.

Critical Specification

The 80 mL tube provides 2.71 fl oz of blue paste formulated as LOCTITE SI 5015 series. This specific shrink-resistant chemistry determines whether the sealant will maintain dimensional stability on precut gaskets under thermal cycling. Verify that the fluid compatibility and temperature envelope match the intended service conditions.

Highlights

  • Shrink-resistant formula maintains seal integrity on precut gaskets
  • Ready for reassembly in 10 minutes working time
  • Withstands extreme heat up to 500 °F operating temperature
  • Remains flexible down to -65 °F for cold starts
  • Sensor-safe composition protects oxygen sensors and catalytic converters

Specifications

BrandLOCTITE

Questions about this item

Should I pick the 80 mL tube or a larger size for coating precut gaskets?

The 80 mL tube provides 2.71 fl oz of paste, which is sized for coating precut gaskets on typical automotive jobs without waste.

What does the 500 Degrees F maximum operating temperature mean once the sealant is cured in an engine?

After a full cure at room temperature, the sealant maintains its seal up to 500 °F, covering most engine and exhaust flange temperatures.

How does the room-temperature cure and 10-minute working time affect installation?

You have about 10 minutes to position the gasket after applying the paste, then the sealant cures fully in one day at ambient temperature.

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