Material
RECKLI formliners are made from rubber-like polyurethane elastomers developed and manufactured in-house in Germany, using a specially formulated compound optimized for reliable use in architectural concrete. The elastic nature of the material ensures smooth, damage-free demoulding of the concrete surface.
Reusability
We supply the formliners in various degrees of reusability. We have three classifications:
- Series C: 100 uses
- Series F: 50 uses
- Series T: 10 uses
The specified number of reuse cycles can only be guaranteed when auxiliary materials such as release agents, adhesives, and repair compounds specifically developed for the formliner material are used.
Due to manufacturing and structural constraints, not all designs are available in all three series, and dimensional limitations may apply. Information on the available series and maximum dimensions is provided on the respective formliner page.
Because surface characteristics may vary between series, combining different series within one concrete element can result in visible colour differences in the finished concrete surface.
Measurements and Tolerances
Despite carefully controlled production processes, dimensional tolerances of several millimetres in the back thickness of the formliners cannot be avoided. These variations are caused by material properties and production-related factors and may occur both within a single formliner and between different formliners.
As with all elastic materials, formliners that are laid out loosely are subject to natural expansion and contraction when exposed to temperature changes. These minor dimensional variations can usually be compensated by re-stretching or compressing the material, or by controlled heating or cooling.
The dimensions shown in the sectional drawings represent average or nominal values and are subject to the stated tolerances. When using these dimensions to calculate quantities, uniform repetition of measurements within a single formliner should not be assumed. This applies both to adjoining pattern sections and to full-size formliners.
Sectional drawings and maximum formliner dimensions are indicated on their respective website.
Formliners can be manufactured from a minimum size of 1 m² in square or rectangular formats.
Series-Specific Dimensions
100-use formliners (Series C)
Series C formliners are supplied in custom dimensions within the specified maximum sizes.
10-use and 50-use formliners (Series F and T)
For Series F and T, the width is a fixed dimension, while the length represents a maximum value. The length can be adjusted in increments of 10 cm up to the stated maximum dimension.
For masonry patterns, the height is a fixed dimension. The position of the horizontal joint course can be specified in increments of 10 cm, up to the maximum dimension.
Due to raw material characteristics and production processes, dimensional tolerances in length and width are unavoidable for Series F and T, in addition to the tolerances in back thickness of several millimetres.
Packaging and Handling
Owing to their high elasticity, Series C formliners may stretch or compress during packaging and transport, resulting in dimensional deviations. To compensate for this and to protect the edges, these formliners are generally supplied slightly oversized in both length and width, allowing accurate fitting on site.
Handling and Application
Cutting
10-use and 50-use formliners can be cut to size using standard circular saws suitable for elastomeric materials.
For 100-use formliners, the RECKLI Formliner Knife is recommended.
Release Agents
Before each use, formliners must be treated with a suitable RECKLI release agent to ensure proper demoulding.
Different types of release agents are available depending on the application. Please contact RECKLI with details of your use case for product selection.
Demoulding
Formliners should be demoulded as soon as possible within the recommended timeframe.
Extended contact between formliner and concrete may result in vacuum formation, which can hinder demoulding and increase the risk of surface damage.
Storage
Formliners must be protected from UV exposure, moisture, frost, and aggressive environmental conditions.
Store on a level surface, keep dry, and transport or store rolled formliners only on their designated sleeves.
Avoid contact with sharp or pointed objects.
Temperature Resistance
Formliners are suitable for temperatures up to +65 °C. Higher temperatures will damage the material.
If higher interface temperatures are expected, the concrete mix design must be adjusted accordingly.
Delivery Format
100-use formliners are supplied rolled on transport and storage sleeves.
10-use and 50-use formliners are delivered flat on pallets or in boxes.
Individual pattern formliners are supplied rolled on transport and storage sleeves.
Application Guidelines
Application guidelines are available in our Downloadcenter.