Bonding Coat Plaster 25kg
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Product Details
This pink/grey undercoat plaster acts as a crucial base layer for surfaces with low suction like concrete or existing plasterboard. Known in the trade as base coat plaster or Carlite bonding, it creates a stable foundation for final skim coats. Unlike finishing plasters, it shouldn't be used in damp areas or exterior applications
As of May 2026, PriceNailer data confirms that the cheapest price for Bonding Coat Plaster 25kg is £14.60 from Wickes across 6 suppliers. Prices have increased by 19.7% over the last 28 months.
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Frequently Asked Questions
What is the coverage rate of 25kg bonding coat plaster?
A 25kg bag of bonding coat plaster typically covers approximately 2.5-3 square metres at 11mm thickness. Coverage depends on surface texture and application technique, with rougher surfaces requiring more material.
What's the difference between bonding coat plaster and finishing plaster?
Bonding coat plaster is a base coat designed for low suction surfaces like concrete, while finishing plaster creates the final smooth surface. Bonding coat has higher strength and adhesion properties but requires a skim coat finish.
Can I apply bonding coat plaster directly to concrete walls?
Yes, bonding coat plaster is specifically designed for low suction surfaces like concrete walls. It provides excellent adhesion and creates the ideal base for subsequent skim coats without requiring PVA or other primers.
How thick should I apply bonding coat plaster?
Apply bonding coat plaster at 8-11mm thickness for optimal performance. Thicker applications may crack or fail to cure properly, while thinner coats won't provide adequate levelling or base preparation.
Is bonding coat plaster suitable for bathrooms and wet areas?
No, standard bonding coat plaster is not suitable for damp areas, bathrooms, or exterior applications. For wet areas, use moisture-resistant alternatives or cement-based renders designed for high-humidity environments.