The Z Counterform Sink Form is used to create an opening for undermount sinks.
8 ft. long x 3-1/4" tall self-adhering flexible sink form. Will conform to most undermount sinks.
**Sink must have vertical walls. For tight radius corners, sink form can be heated with a blow dryer or heat gun to soften the plastic so it bends easier. If using a zero radius sink, sink form will have to be cut into 4 pieces (one for each side of the sink).**