ON GUARD™ Acid Detecting Paint is a durable, industrial coating with a unique acid-sensitive component, which changes color (golden yellow to brilliant red) when exposed to acid or acid vapors pH 3 or lower. The reaction of ON GUARD to acids pH 3 or lower is instantaneous.
Use ON GUARD over primer as a topcoat. The use of ON GUARD White Primer #315 is strongly recommended. This product may cause lifting of inferior sub coats. Surfaces must be clean, dry, rust, dust, oil, and contamination free. ON GUARD may be used over existing paint if the user is assured that the sub coating is stable and the surface is clean, dry, rust, dust, oil, and contamination free.
THINNING: ON GUARD can be reduced with Acetone solution, if desired. For air spray, thin up to 10%. For airless sprayer, brush or roller, thin up to 5%.
STORAGE TEMPERATURE: Minimum 20 °F (-7 °C)/Maximum 110 °F (43 °C).
SHELF LIFE: Two years in the factory-sealed can at the above storage temperature.
MIXING: Stir ON GUARD thoroughly, making sure that no pigment remains on the bottom of the can.
COVERAGE RATE: 250 to 300 square feet per gallon. Allow for overspray and surface irregularities.
APPLICATION PROCEDURE: Apply ON GUARD to achieve 4 mil dry thickness (2-3 brush coats).
SURFACE TEMPERATURE: Minimum 40 °F (4 °C) / Maximum 120 °F (49 °C)
CLEAN UP INSTRUCTIONS: Clean all equipment immediately after use with Xylene. Flush and clean spray equipment before material dries.
APPLICATION EQUIPMENT: Air or airless spray, brush or roller.
AIR SPRAY: Suggested equipment, or equivalent. See chart.
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Air Spray Chart
Note: Low temperature or longer hoses require higher pot pressure