Blue Grit 10L
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Product Details
Blue Grit 10L is a ready-to-use plaster bonding agent in a 10-litre tub, designed to create a strong mechanical key on smooth, low-suction surfaces like plaster, concrete, painted walls, glazed tiles, glass, ceramics, MDF, and plasterboard. Apply it with a brush or short-pile roller in one even coat—its blue colour makes it easy to see coverage and avoid missing spots. Ideal for DIY wall preparation before plastering, especially on tricky substrates, it covers about 4-5m² per litre and needs 24 hours to dry fully above 5°C. Stir well before use, protect adjacent areas from splashes, and plaster over it once dry for reliable adhesion with gypsum plasters.
As of May 2026, PriceNailer data confirms that the cheapest price for Blue Grit 10L is £26.99 from Screwfix across 6 suppliers. Prices have increased by 12.7% over the last 1 month.
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Frequently Asked Questions
What coverage does Blue Grit 10L provide?
Blue Grit 10L covers approximately 40-50m² in total, with a coverage rate of 4-5m² per litre. This makes it suitable for medium to large wall preparation projects before plastering.
How long does Blue Grit take to dry before plastering?
Blue Grit requires 24 hours to dry fully when applied at temperatures above 5°C. Ensure the surface is completely dry before applying gypsum plaster over it for optimal adhesion.
What surfaces can I use Blue Grit bonding agent on?
Blue Grit is designed for smooth, low-suction surfaces including painted walls, concrete, glazed tiles, glass, ceramics, MDF, and existing plasterboard. It creates a mechanical key on difficult substrates that would otherwise have poor plaster adhesion.
Why is Blue Grit coloured blue?
The blue colour allows you to easily see coverage during application, ensuring no areas are missed. This visual guide helps achieve even coverage and prevents patchy application that could affect plaster adhesion.
How do I apply Blue Grit bonding agent?
Apply Blue Grit in one even coat using a brush or short-pile roller after stirring well. Protect adjacent areas from splashes and ensure good ventilation during application.