Contact Cement High Efficiency Furnaces Vent and Make-Up Air 8 oz Gray Liquid Solvent 30 to 50% Furan Tetrahydro 10 to 25% Acetone 10 to 20% Cyclohexanone 10 to 25% Methyl Ethyl Ketone 12 to 20% Polyvinyl Chloride 1 to 5% Fumed Silica 14 to 23 deg F Flash Point 151 deg F Boiling Point