Check the listing for details. STI AS205 Fire Barrier Spray,Pail,5 gal 4MM44. Condition: New. Listed at 331.97 USD. Fire Barrier Spray, Application Method Airless Sprayer, Color Blue, Container Size 5 gal, Container Type Pail, Coverage Area 12.8 sq ft/gal @ 1/8 in Wet Thickness, Drying Time 2 hr, Expansion Temperature Not Applicable, Fire Rating 4 hr, Firestop Type Spray, Flame Spread Index 10, Flame Spread Rating Class A, For Material Type All Common Construction Surfaces, For Use On Curtainwall, Wall to Wall, Floor to Wall, Floor to Floor, Head of Wall, Formulation Latex Based STI(R) SpecSeal(R) AS200 Elastomeric Spray is a latex-based elastomeric firestop spray for construction joints and perimeter fire barrier applications. It cures to form a durable seal that resists the passage of the products of combustion while accommodating for high dynamic joint movement. • Applied with airless spray equipme.