Best results are obtained with airless sprayer application. May be diluted up to 50% with water. Respirator should be worn while applying product. Dries in two hours. Effective on both sheet metal and fiberglass liner surfaces. If used in conjunction with a sanitizer treatment, the sanitizer must be applied before the encapsulant. ADE Air Duct Encapsulant is non-toxic, non-flammable, non-staining, odorless, colorless, biodegradable and environmentally safe. Available in 5-gallon pail, carton of four 1-gallon plastic jugs and individual 1-gallon plastic jugs.