Specified form liner is fastened to casting beds.  If form liner pattern does not extend over entire surface of panel, form buildup to bring the pattern into the correct plane may be required.  Once liner has been constructed, concrete is poured on liner surface for pattern to transfer into concrete.

Finish Exposure

Finish exposure is highly dependent of the form liner type specified for the project.  Form liner features can vary 1/8″ to several inches of depth.  Concrete poured on liners can benefit from a secondary sandblast or acid etch finish to expose some of the aggregates below.


The inherit plasticity of concrete during casting allows for a high level of detail to be transferred into the concrete.  If properly coordinated, liner types can be flipped to mirrored so different patterns can be produced from a similar casting setup.

Design Considerations:

There are several different form liner types and sizes available.  The most common types are single use ABS plastic, unbonded urethane and bonded urethane liners which come in different sizes.  Early coordination with the precaster is recommended when selecting a liner type for coordination liner seams.  Liner seams if not properly hidden can be a noticeable blemish on final product.

Architectural Polymers Formliners