Flamecheck™ M-111PA is a fire-retardant paint additive for latex (water based) Paint with a “Class A” fire rating. Flamecheck™ M-111PA is a water-based fire-retardant treatment that is non-toxic, non-corrosive, non-bioavailable, non-allergenic, non-odorous when dry and environmentally friendly. Flamecheck™ M-111PA passed ASTM E-84 test with ZERO Smoke and Zero flame spread. Can be used for both Interior and Exterior-grade latex paints. Non-intumescent. Coverage: treated paint covers 300-350 sq ft per gallon. Apply 2 coats or 2 mils thickness. 40 oz bottle is enough to treat a 5 gallon bucket of paint.