3M Diamond Lapping Film 668X, 30.0 Micron Sheet, 228.6 mm x 279 mm Rewind Creates a permanent seal against

Creates a permanent seal against water

7 mil thick tape is made with an polyimide film and a silicone adhesive

put up signage and displays

Bumper rails

Not suitable for low surface energy materials

3M Diamond Lapping Film 668X, 30.0 Micron Sheet, 228.6 mm x 279 mm Rewind Creates a permanent seal against3M Diamond Lapping Film Sheet 668X is a PSA version of 661X product. Precisely graded diamond particles coated on a polyester film. Provides a consistent, repeatable finish on extremely hard materials. Available in many grades between 0. 10 and 30. 0 micron. Use 3M Diamond Lapping Film 668X for a consistent finish to extremely hard materials such as ceramics, stone, carbide, exotic alloys, glass and composites. PSA versions of 661X lapping film are