How to formulate heat-resistant coatings?

Heat-resistant paints and coatings are specifically formulated to shield surfaces from extreme temperature fluctuations and high heat exposure. High-temperature resistant coatings are a specialist coating system that is designed to withstand temperatures typically ranging from 120°C (250°F) to over 760°C (1,400°F)¹. High-temperature coatings enrobe metal components in a polymer casing to prevent contact with moisture. 

Given below is an image of a conventional coating used in a high-temperature environment. Corrosion spots are inevitable when a conventional coating is used in high-temperature environments⁴.

Image credits: Forrest Technical Coatings⁴

Here’s how silicones, as an example, help prevent corrosion:

• Silicone resins used in high-temperature coatings are based on the silicone-oxygen bond (also known as siloxane bond or Si-O bond).
• The siloxane bond is about 25% stronger than a carbon-carbon bond found in most organic resin structures used in typical industrial paints.
• Siloxane bonds form a cross-linked structure when cured and produce a generally very hard, chemical resistant, heat resistant, and light-degradation resistant coating.
• These qualities prevent the breakdown of the coating film that protects the substrate and therefore prevents corrosion from beginning³.

Find more about corrosion protection here >