Sherwin-Williams’ SherFlex elastomeric polyurethane coating and lining system has been approved to ANSI/NSF Standard 61 for use in potable water tanks of 3,000 gallons or greater.

CLEVELAND – Sherwin-Williams’ SherFlex elastomeric polyurethane coating and lining system has been approved to ANSI/NSF Standard 61 for use in potable water tanks of 3,000 gallons or greater. SherFlex is a high-build, impact- and chemical-resistant elastomeric polyurethane for coating concrete and steel potable water assets. If cured at 77 °F, owners can begin the disinfection process 24 hours later. It is a flexible alternative to thin-film epoxies, which typically require a five-to seven-day return-to-service interval and, because they are more brittle, are prone to cracking when steel and concrete expand and contract.