HPC®-HT Primer is a single-component resin, water-based coating using specific ceramic fiber loads for application directly over surfaces 200°C (392°F) and up to 600°C (1112°F). It was designed to provide the initial adhesion over extremely hot surfaces before the heavier-loaded HT is applied. HPC®-HT Primer offers a ‘green’, nonflammable, non-toxic formula for high-heat surface priming. HPC®-HT Primer is easily applied, and can be applied direct to metal, concrete and other high- temperature surfaces. It will seal and block CUI over hot surfaces.


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Product Chemistry Resin, water-based & ceramic fiber
Volume Solids 39.5%
VOC Level 200 g/L, 1.67 lbs./gal.
Dry Time (at 400-1112°F) 10 seconds per coat
Cures By Evaporation on hot surfaces

Typical Uses

1. As the high-temp primer coat for surfaces greater than 250°C, over hot pipes, tanks, and valves
2. Applied when a hot system cannot be shut down.

Application Methods

The application is applied using a texture sprayer, or a hopper gun for small jobs. For specific instructions on surface preparation, mixing and application, please refer to the HPC®-HT Primer Application Instruction Sheet. HPC®-HT Primer will dry immediately upon contact and be ready for the regular HPC HT application.

Resources & Downloads

Product Documents