Patent ID: 8877311

Claim:
A masking barrier comprising: a. a barrier sheet; and b. a T-shaped edge assembly extending from an edge of said barrier sheet comprising: i. a first extension having a first face and a second face; ii. a second extension having a first face and a second face; wherein the first extension and second extension extend from the barrier sheet in opposing directions to form said T-shaped edge assembly; wherein said barrier sheet extends from said T-shaped edge assembly at a substantially center location between the first and second extensions and extends a length that is at least five times a width of the T-shaped edge assembly; wherein each of said first faces of said first and second extensions are configured opposite the barrier sheet; wherein each of said first faces of said first and second extensions comprises a pressure sensitive adhesive having a release sheet configured over said adhesive; wherein at least one of said release sheets comprises measuring lines; and whereby when said edge assembly is attached to a surface with both the first and second extensions attached by the pressure sensitive adhesive, a force on the barrier sheet, substantially perpendicular to said surface, will create opposing shear forces between said extensions.