This is a Twin Pack of 1 Gallon Size containers (2 Gallons total) of D/2 Biological Solution. If you are contemplating a large purchase, please contact us about volume pricing discounts.

D/2 Biological Solution is specially formulated to remove environmental pollution, dirt, and staining from biological soils such as mold, mildew, lichen, and algae from indoor and outdoor structures.

Please note: the shape of the jug is changing to a square design. During this transition period, you may receive a square gallon or a gallon in the shape currently pictured (F-style jug). Photos of the new jug design will be coming soon!