Product Overview
British Gypsum Thistle Bonding Coat, a multi-purpose undercoat plaster formulated for smooth or low suction backgrounds including dense blockwork, concrete, tiling, plasterboard, and surfaces pre-treated with Thistle Bond-it.
Supplied as a pre-mixed gypsum plaster with exfoliated vermiculite aggregate, it only requires the addition of clean water, making it quick and simple to prepare on site.
Its fine, lightweight mix delivers excellent workability, ensuring reliable performance when spreading, ruling, or darbying. The result is a durable, level undercoat that provides a strong, hard-wearing base for British Gypsum finishing plasters, producing a surface ready for decoration.
It can be applied directly to plasterboard where dubbing out is needed, or used in refurbishment projects to restore and level existing internal walls and ceilings.
Features & Benefits
- Durable base: Provides a strong, hard-wearing undercoat for decorative finishes.
- Low suction backgrounds: Suitable for use on plasterboard, dense blocks, concrete, and tiled surfaces.
- Versatile undercoat: Works across new-build and refurbishment projects.
- Direct to plasterboard: Can be applied where dubbing out is required.
- Fine mix formulation: Delivers smooth application, reliable workability, and consistent results.
- Easy preparation: Only requires the addition of clean water before use.
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System compatibility: Forms an ideal base for finishing plasters such as Thistle MultiFinish.
Applications
- Undercoat plaster: Provides a reliable base for skimming with British Gypsum finishing plasters.
- Smooth or low suction backgrounds: Suitable for surfaces such as dense blockwork, concrete, plasterboard, tiling, or bonding-agent-treated substrates.
- Wall and ceiling renewal: Applied as part of refurbishment projects to level and restore old surfaces.
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Plasterboard dubbing out: Levels irregular surfaces before finishing.
Installation Guidance
- Background preparation: Ensure substrates are sound, clean, and suitably pre-treated where required (e.g. Thistle Bond-it on painted or very smooth surfaces).
- Mixing: Add clean water to the pre-mixed plaster and blend to achieve a smooth, workable consistency.
- Application: Spread evenly, rule to level, and finish with a darby before applying finishing plaster.
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Setting time: Work within the recommended period to avoid premature stiffening.
Compliance & Performance
- Manufacturer: British Gypsum.
- Product type: Pre-mixed gypsum undercoat plaster with exfoliated vermiculite aggregate.
- Performance: Provides a durable, even base for finishing plasters and decorative applications.
- Preparation: Requires only clean water for mixing and use.