Sherwin-Williams Industrial & Marine Coatings: Duraplate® UHS ultra high solids epoxy with fluorescing optically active pigments (OAP) allows tank lining applicators to check the coating instantly for pinholes, holidays and other discontinuities and verify uniform coverage and proper film thickness.

Sherwin-Williams Industrial & Marine Coatings: Duraplate® UHS ultra high solids epoxy with fluorescing optically active pigments (OAP) allows tank lining applicators to check the coating instantly for pinholes, holidays and other discontinuities and verify uniform coverage and proper film thickness. The new formulation meets the requirements of NSF Standard 61 for potable water tanks of at least 1,000 gallons. The coating is available as a single- or multi-coat application.

When viewed under ultraviolet light, a single-coat system with the OAP pigments will fluoresce or glow even when still wet. Pinholes, holidays and improper film thickness will either appear black in contrast to the fluorescing coating, or not as bright due to insufficient film thickness. With multi-coat systems, when the primer with OAP is used and the topcoat does not have OAP, pinholes will fluoresce under inspection of the topcoat. Pinholes as small as .25 mils can be identified and corrected before a tank is placed into service using an inexpensive ASTM E 2501-approved light source.

For more information, call 800.524.5979. The company’s website is at www2.sherwin.com/im/.