There are several different types of form liners, which vary based on the application. Single-use form liners are usually made of styrene plastic and are normally discarded after the first use. Multi-use form liners are usually made of ABS plastic and range in number of uses from 2 to 10 or more. Multiple-reuse form liners are usually made of polyurethane, a heavy rubber material known for its reusability and used frequently by departments of transportation on sound walls, bridges and other applications. Other form liner materials used can include polystyrene foam, fiberglass, and even aluminum-- styrene plastic, ABS plastic, and urethane are considered to be the industry standard, and are most often specified in plans by architects and engineers.
The form liners are attached to forms and concrete is placed against the liner. The liner pattern is transferred into the wet concrete. After the concrete has cured, the liner is stripped and the unique sculpture is exposed.
Architectural elastomeric urethane form liners were pioneered in 1968 at RECKLI GmbH, Herne Germany.3 The inception of form liners began with fairly simple images for concrete, including cut-out shapes and silhouettes resting on a background texture. As time passed, these designs grew in complexity, and creative artists and sculptors began to work with form liner manufactures to produce and design anything imaginable in concrete walls, and on a grand scale.
Form liner textures were popularized in the early 1970s with graphic inlays. In 1972, Scott System created a fluted form liner with graphic inlays of shrimp boats, a famous crawfish wrapped around an oil bearing, tug boats and race boats. This sound/retaining wall, located in Morgan City, LA, was to be the first use ever of graphic inlays in form liner.
Balogh, Anne. "Concrete Walls Display Eye-Catching Artwork". The Concrete Network. http://www.concretenetwork.com/anne_balogh/concrete_walls.htm ↩
Johnson, Amy. "Form Liners: Function & Beauty". Concrete Decor. http://www.concretedecor.net/Abstracts/CD602-Form_Liners.cfm ↩
Schwab, Robert (24 July 1999). "Concrete Artist's Venture a Snap". The Denver Post. http://nl.newsbank.com/nl-search/we/Archives?p_product=DP&p_theme=dp&p_action=search&p_maxdocs=200&p_topdoc=1&p_text_direct-0=0EAF4533F4A2A7EC&p_field_direct-0=document_id&p_perpage=10&p_sort=YMD_date:D&s_trackval=GooglePM ↩