Encap Carpet & Upholstery Dry Foam, Encapsulating Shampoo. An extremely eff ective â€œinterimâ€ maintenance tool. The results will rival carpet appearance attained from other soil extraction products. Encap Encapsulating shampoo also has the same advanced formula, so it encapsulates the soil, adds stain resistance and significantly retards re-soiling. All the advantages of the fast drying bonnet or foam system plus all the Encap features. Our Encap carpet care products do not contain any optical brightener. Most carpet manufactures object to their use because they can distort the carpet color even after one use. ENCAP products are also formulated in a pH range so they will meet all carpet manufacturers recommendations for â€œWet Sideâ€ cleaning. They are also safe for use on traditional wool carpeting and for upholstery shampooing on all fabrics not harmed by water.