Supreme Chemical MC-2 Di-All MC-2 Liquid Mildewcide Additive by Supreme Chemical. Save 8 Off!. $15.89. mildewcide additive. Di All liquid mildewcide paint additive is specially formulated for interior paint applications. 10gm treats 1 gallon of latex paint or stain or 50gm treats 5 gallon. Will not affect the color, finish, or durability of latex finishes. Can be used in interior or exterior latex and oil based coatings. MC 2 can also be added to wallcovering adhesives to control mildew.