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Concrete Casting: Flexible Form Liners

Liquid Mold Rubbers for Flexible Form LinersPolytek® two-part, room temperature curing mold rubbers are used to create custom flexible rubber inserts or form liners that are placed into a rigid form. These highly detailed liners are often used to cast decorative concrete panels, wall blocks, fencing, retaining walls and sound barriers. Liners can be easily removed from the form for demolding or replaced when a change in texture is desired. Polytek® polyurethane rubbers can meet the demands of any size liner.

Popular product options are listed below:

The polyurethane mold rubbers listed below are pourable, but can be thickened with PolyFiber II or Fumed Silica to make brush-on molds.

Select an option below for additional product details and buying information or browse all polyurethane mold rubbers or silicone mold rubbers:



Product Description
Poly 74-29 Liquid Rubber A medium-soft polyurethane rubber popular for gasket panels for brick veneer.
Poly 74-45 Liquid Rubber A mid-range hardness polyurethane rubber popular for patterns with moderate undercuts.

Poly 75-65 Liquid Rubber

A medium-hard polyurethane rubber popular for patterns with little to no undercuts.

Poly 75-80 Liquid Rubber A firm polyurethane rubber popular for patterns with no undercuts.