Primer
Liquid painted on the base before the adhesive.
- Where it is used: Plaster, anhydrite and very absorbent bases.
- Watch out: On anhydrite give two coats; the first one diluted.
Brands and types in the UK (6)
Mapei Primer G 5kg
Resin primer for absorbent substrates like plasterboard or plywood before tiling.
Technical data
- Volume: 5kg
- Very low volatile organic compound
- Helps prevent shrinkage cracks
- Consumption: 0.1-0.2 kg/m²
- Brush or roller application
Source: Builder Depot
Ardex P51 Primer and Bonding Agent 5kg
High-strength multi-purpose primer, bonding agent and sealant for porous surfaces before cement or plaster materials.
Technical data
- Maximum coverage per kg: 32m²
- Blue pigment for clear identification
- Solvent-free and low odour
- Dilutable with clean water
- 5kg re-sealable tub
Source: Builder Depot
PlasCrete Plasfloor PMR General Purpose Acrylic Primer 2.5L
Low VOC emulsion primer designed to promote adhesion of PlasCrete levelling compounds to absorbent and non-absorbent surfaces.
Technical data
- Volume: 2.5L
- Low VOC
- Green colour for visual coverage control
- Coverage diluted to absorbent: 50m²
- Coverage undiluted non-absorbent: 25m²
Source: Builder Depot
Warmup Floor Primer 1L
Ready-to-use, solvent-free primer to improve adhesion for underfloor heating systems, levelling compounds, and tile adhesives.
Technical data
- Volume: 1L
- Solvent-free and low VOC
- Purple colour
- Coverage porous: 20m²/l diluted 1:1
- Coverage non-porous: 14m²/l undiluted
Source: Builder Depot
EVO-STIK Flexibond Tile Adhesive Primer White 1L
Acrylic dispersion polymer used as flexible admixture, tile adhesive primer, or sealer for ready-mixed tile adhesives and screeds.
Technical data
- Size: 1L
- Colour: White
- Coverage: Approx. 30 m2
- Drying time: approx. 1 hour
- Improves deformability of C2 adhesives
Source: Wickes
Mapei Eco Grip Plus Grey Primer 5L 5kg
Multi-purpose ready-to-use primer for ceramic tiles, guaranteeing a rough keying surface for levelling compounds, render and cementitious adhesives.
Technical data
- Coverage: 25m² per 5kg
- Low VOC
- Application: brush or roller
- Drying time: 1 h
- Number of coats: 2
Source: B&Q
Sources: product listings from B&Q, Builder Depot, Wickes, checked on 31-10-2026. Photos are from Builder Depot (with permission) the manufacturer or the shop (shown under each photo); where there is no photo we show a drawing. Original Fixiz Academy text; data can change, always check the manufacturer data sheet.