AS we know, Sanding disc are available in variety of different backings, the most common of which are cloth, film, hook & loop, and PSA (Pressure Sensitive Adhesive). Each one is designed to support quality results for certain materials and applications.  Last article we have introduce cloth backing of sanding disc, in the article, we introduce film sanding disc backings and outline how to choose the best material for your next project.

FILM

The backing on film sanding discs is made from thick plastic sheeting that's durable while remaining flexible enough to match contours without ripping or weakening. While film-backed abrasives cost more than paper, it's worth the price if you do a lot of wet sanding (e.g. in the automotive or metalworking industry) or work on contoured pieces like car parts. Their waterproof properties also make film discs ideal for marine boat finishing.

ADVANTAGES

Stiff enough to resist tearing

Does a great job on contours

Waterproof - ideal for wet sanding

Lasts longer than paper backing, so you won't have to replace your discs as often

DISADVANTAGES

More expensive than paper