Urethane & plastic liner application guide

01 / Plan and prove the finish

1. Confirm the pattern code, drawing revision, material, coverage, orientation, joints and corner treatment. Dry-layout adjacent panels before trimming; a rotated panel may change the seam.
2. Inspect the delivered liners and record damage before installation. Keep identification with each panel.
3. Prepare clean, flat, stable form faces. Check lines and levels, backing and edge support against the approved forming plan.
4. Make a representative mockup using the intended concrete mix, release agent, joint treatment, placement, vibration and stripping method. Agree on the acceptable finish before repeating it in production.

02 / Plastic liners

Confirm the concrete-facing side and the specified sheet thickness. Allow for temperature-related movement when laying out and fixing sheets; use the selected product’s dimensional guidance rather than a generic expansion allowance.

Support the liner while trimming with suitable tooling. Fix it flat to the form face without distorting the pattern. Deep profiles may need backing. Select fasteners, spacing and seam materials for the actual liner and forming system; keep concrete from flowing behind the sheets.

Use a release agent confirmed compatible with the liner. Check the chemical supplier’s application and drying instructions and test compatibility before treating the whole liner. A product that softens or makes the surface tacky is unsuitable.

03 / Urethane liners

Lay the liner out without stretching it. Follow its sequence markings and check the pattern at every join. The support and attachment method must suit the liner’s backing and weight.

Where adhesive mounting is specified, prepare the substrate and liner back as directed, use the compatible adhesive, and allow its prescribed cure before loading the surface. Where mechanical attachment is specified, follow the approved fastening layout.

Use the release system specified for the urethane formulation. Apply it evenly, including appropriate edge details, and remove excess according to the supplier’s instructions. Do not substitute a plastic-liner chemical or repair compound without compatibility confirmation.

04 / Place, consolidate and strip

Check liner restraint, sealed joints, form ties and backing before placement. Use the approved pour rate and forming-pressure limit for the actual project. Consolidate concrete using the proven mockup procedure, keeping vibrators from contacting the liner.

Strip only after the required concrete strength and the approved stripping conditions are met. Follow the pattern’s release direction, support the liner and avoid dragging across details or forcing undercuts. Record surface defects and correct their cause before the next pour.

05 / Clean, protect and reuse

Remove residue using the approved cleaning method without damaging the texture. Inspect edges, joints and attachments after each use. Follow the liner’s repair and reuse instructions; thickness alone does not establish a guaranteed number of pours.

Protect liners from prolonged sunlight, excessive heat, contamination and damage during transport or storage. Use the material’s specified storage conditions and support arrangement. Keep release agents and adhesives with their current technical and safety data sheets.