customrock form liner design & patterns


Browse our extensive selection of patterns and textures


customrock form liner product selection


With over 30 years of nationwide experience as a staining and coloration contractor, Custom Rock delivers superior quality at the right price.

customrock form liner specs & information

Sample Specifications and Other Information

From bridges and buildings to sound walls, Custom Rock Formliner is your solution for aesthetic treatment.

about customrock form liner

About Custom Rock Form Liner

Custom Rock Formliners and coloration services are used in commercial and residential projects nationwide.

During the process of construction, using the right formliner material plays a significant role in the outcome of the project. A urethane formliner, which is also called elastomeric, is superior to the plastic options for a few key reasons.


Custom Rock urethane liners are available in multiple grades of durability

When compared to urethane, plastic is rigid which significantly decreases it durability.. Urethane is more durable and will last much longer, making it an appropriate choice for any construction project that requires a specific pattern for a large area or for several projects that require the same pattern.

Realism of the Finished Texture

The advantage of urethane is not limited to the flexibility or the durability of the material. The final result is another benefit that makes it a superior way to create patterns during a construction project.

Urethane patterns create a finished product that has a rich texture and realism. When comparing natural stone to a pattern created with urethane the appearance and depth of texturing makes the finished product nearly impossible to differentiate from real stones.

Due to the nature of the material and the production process, plastic formliner does not replicate the same quality of texture.. Urethane is in a liquid state when poured into the mold and picks up every nuance of the texture, while plastic is in a pliable but solid state when vacuumed onto the mold. As a result, depending on the texture itself, plastic textures may fall a little flat or have edges that are too smooth. Cleanup of the Finished Concrete Surface

Anytime formliner is used, seams occur where any two liners meet. Though both urethane and plastic create seams, the seams left by urethane can be minimized if the liners are caulked prior to casting concrete.  The weight of the concrete will compress the urethane at the seams, The seams left by plastic liners are often much more obvious, as the rigidity of the material prevents any compression from the concrete.  The end result is that seams created by plastic liners usually require more work to grind and sack than those created by urethane..

It is also worth mentioning that a number of our textures create keyed, or puzzle-piece formliner, which means that the seams are all hidden inside the grout joints in the pattern, requiring very little if any finishing work.  Plastic formliners are generally available only in standard 4’ x 10’ sheets.

Selecting the right material for a liner can make a difference when it comes to aesthetics and the final result of the project. Urethane liners are more durable, create a more realistic texture and require fewer adjustments..