Cornerstone SuperTherm Topcoat Plaster

Suitable for internal use, where the binder strength is appropriate for the host background or surface.

Relevant for applications requiring a compatible topcoat for SuperTherm, our most insulating thermal layer and basecoat plaster. Appropriate for various project types, including conservation, renovation, or sustainable construction.

A 25kg bag yields up to 15 litres of lime plaster and covers up to 2.5m² at a 6mm thickness. Consumption rates will change based on how even the background is and suction. On-site trials are advised for the best yield indication for your specific project.

As natural products, our kiln-dried sands may exhibit variations in colour, texture, and shape. While these variations are minimal, when colour consistency is crucial, we strongly advise each elevation is completed using material from the same batch.

Supplied in 25kg polythene-lined and colour and batch-code paper bags for easy identification on-site and palletised for ease of transport, storage, and handling.

See the Technical Data and Documentation section for detailed product information, application guidance, and datasheets. Always review any available documents before use. Each project is unique, always seek professional advice before undertaking a project.

Do not use in temperatures below 5°C or above 30°C, or if freezing conditions are predicted within the following few weeks, including wind chill. We always advise following best practices for curing and protecting fresh lime renders and plasters. Protect from adverse environmental conditions, including frost, rain, direct sunlight and drying winds.