AWC II On Guard Acid Detecting Paint On Guard Detecting Paint is a durable, yellow coating with a unique acid-sensitive component, which changes color (yellow to red) when exposed to acid or acid vapors pH3 or lower.
AWC II On Guard Base Detecting Paint On Guard Base Detecting Paint is a durable, white coating with a unique base-sensitive component, which changes color (white to blue) when in the presence of base of pH 10 or higher.