Series 91-H2O

Hydro-Zinc

Generic Type

Aromatic Urethane, Zinc-Rich

Common Usage

A two-component, moisture-cured, zinc-rich primer for the interior and exterior of steel potable water tanks. Provides outstanding long-term corrosion resistance when used as a primer in conjunction with other Tnemec potable water tank coatings. It cures quickly and can be topcoated the same day at surface temperatures down to 35°F (2°C). Series 91-H²O has no maximum recoat time, making it ideally suited as a primer for both sides of plate steel surfaces in water tank fabrication shops. Application methods include “dry-fall” under certain conditions (see Application). Note: When used in conjunction with cathodic protection, anodes or impressed current systems should not provide current demand more negative than –1.05 volts relative to a copper–copper sulfate reference electrode half-cell.

Special Qualifications

Certified (with or without 44-710 Urethane Accelerator) by NSF International in accordance with NSF/ANSI/CAN Std. 61 and the extraction requirements of NSF/ANSI/CAN 600 and is qualified for use on interior potable water tanks of 1,500 gallons (5,678 L) capacity or greater, pipes 24 inches (61 cm) in diameter or greater, valves 3/4 inch (3.8 cm) in diameter or greater, fittings ½ inch (1.3 cm) in diameter or greater, and pumps 3/4 inches (1.9 cm) in diameter or greater. Topcoating with Std. 61 certified Tnemec coatings is required. Contact your Tnemec representative for specific recommendations. Reference Tnemec's certified product listing at www.nsf.org for details on the maximum allowable DFT. Meets zinc-rich primer requirements of AWWA D102-17 Standard for Inside System No. 3 & 5 and Outside System No. 3, 4 & 6. Series 91-H²O uses a zinc pigment which meets the requirements of ASTM D 520 Type III and contains less than .002% lead.

This product is part of a coating system tested in accordance with ISO 12944-6 (2018). Contact your Tnemec representative for coating system test results.