What forms of backing can be used and why? 

Better Life Technology distributors stock an anti-slip backing product with a clear adhesive on the back. It is a rayon fabric coated with a semi-rough, black polyvinyl slip resistant coating. It is sold on 54” x 25’ rolls. Closed Cell Neoprene Foam, Rubber, Felt and other backing materials may also be used, but are not stocking items.