Heat-Flex Hi-Temp 1200 from Sherwin-Williams is an immersion-grade, single-component, inert multipolymeric matrix coating designed to combat corrosion under insulation (CUI) in the oil and gas industry.
The coating combines ambient cure, surface tolerance and UV resistance for application under calcium silicate and mineral wool insulation systems, and is recommended for use in wet/dry cyclic service at operating surface temperatures of cryogenic to 1,200°F, with application temperatures from ambient to 500°F.
Coatings formulated for immersion service are suited for CUI because the contaminants that pass through the insulation along with the water create an aggressive operating environment, the company says. Insulation systems generally vary in their water retention, permeability and wetability characteristics; infiltration can occur due to breaks in the waterproofing, inadequate system design, incorrect installation, poor maintenance practices or a combination of the above.
According to Sherwin-Williams, the coating outperformed alternatives in multi-cycle laboratory testing, offering better corrosion and abrasion resistance, increased flexibility and harder film.