Larsen Acrylic Primer for Tiling & Screeding 1L & 5L
1 litre
£8.95
Sale price
£8.95
Regular price
Select Quantity
Total
inc VAT
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Larsen Acrylic Primer for Tiling & Screeding 1L & 5L
£8.95
Sale price
£8.95
Regular price
Select Quantity
Total
inc VAT
Larsen Acrylic Primer is a ready-to-use, water-based primer for porous and difficult surfaces before tiling or screeding. It also seals gypsum plaster and screeds before cement-based tile adhesive goes on. Use it neat to seal, or diluted 1:1 with clean water for general priming.
Key features
- Ready to use: water-based polymer emulsion, supplied ready for use
- Primes or seals: dilute 1:1 for general priming, or use neat to seal gypsum plaster and screeds
- Improves adhesion for Larsen tile adhesives and Larsen flooring products
- Pink colour shows where it has been applied
- Touch dry in under 1 hour on porous surfaces
- Underfloor heating: suitable for heated concrete and cement screeds up to a maximum surface temperature of 35°C
- Tools clean up with warm water
Technical specification
| Pack sizes | 1 litre, 5 litre |
| Form | Water-based liquid (polymer emulsion) |
| Colour | Pink |
| Coverage (neat) | approx. 7–10 m² per litre (approx. 35–50 m² per 5 litre) |
| Coverage (diluted 1:1) | approx. 14–20 m² per litre (approx. 70–100 m² per 5 litre) |
| Dilution | Neat to seal; 1:1 with clean water for general priming |
| Touch dry | Less than 1 hour on porous substrates |
| Overcoat | 2–4 hours at 20°C |
| Ready for adhesive or screed | When dried clear, typically within 1–2 hours |
| Application temperature | +5°C to +30°C |
| Underfloor heating | Heated concrete and cement screeds, max. surface temperature 35°C |
| Density | 1.01–1.03 g/cm³ |
| pH | 7.0–9.0 |
| Dry matter content | Approx. 20% by weight |
| Shelf life | Typically up to 18 months in good storage conditions |
| Storage | Sealed containers, dry conditions, protected from extremes of temperature |
Per-5-litre coverage is simply Larsen's per-litre figure multiplied by five.
Where to use it
- Porous and difficult substrates before tiling or screeding (see our floor levelling and preparation range)
- Gypsum plasters and screeds, sealed before cement-based tile adhesives
- Dense and porous surfaces before any Larsen tile adhesive or Larsen flooring product, such as self-levelling compound
- Heated concrete and cement screeds (underfloor heating) up to a maximum surface temperature of 35°C
How to dilute
Acrylic Primer comes ready to use but may need diluting with an equal volume of clean water (1:1), depending on the job. Diluted primer should stay usable for several days; just mix well before use.
How to apply
- Prepare the surface. It should be hard, structurally sound and stable, surface dry, and free from significant laitance, dust or other contamination that could affect adhesion.
- General priming of porous surfaces (not sealing): dilute 1:1 with clean water and apply. Very porous substrates may need a second coat once the first has dried.
- Sealing surfaces such as gypsum plaster: apply a first coat diluted 1:1 and let it dry, then apply a second coat neat. Don't let neat primer pond. Two or more neat coats may be needed.
- Tile or screed once the primer has dried clear, typically within 1–2 hours. For two coats, the usual practice is the first coat in the evening and the second the next morning, before tiling or screeding.
- Protect primed surfaces from traffic and contamination until the final product is applied. If the primer has been left to fully dry and cure for several days, adhesion may be impaired and a further coat of primer may be needed.
Work to current best practice, including BS 8203 and BS 8204 and TTA, CFA and FeRFA guidance. Priming should never be used to try to improve a poor or failing substrate. When applying neat, take care that the primer doesn't skin, which can lead to delamination.
Delivery & support
- Free UK delivery on orders over £499 including VAT
- 14-day returns
- Visit our showroom: Unit B2, Stag Industrial Estate, Endemere Road, Coventry CV6 5PY. Open Mon–Fri 9am–6pm, Sat 10am–5pm, closed Sunday.
Source: Larsen Acrylic Primer technical data sheet (Version 02, Nov 2024) and the Larsen Acrylic Primer product page. Always follow the current Larsen technical data sheet.
| Brand | Larsen |
|---|---|
| SKU | LAR-ACRPRIMER-1L |
FAQs
What is Larsen Acrylic Primer used for?
It's a ready-to-use, general-purpose primer for porous and difficult surfaces before tiling or screeding. You can also use it to seal gypsum plaster or screeds before applying cement-based tile adhesive.
Do I need to dilute Larsen Acrylic Primer?
It depends on the job. For general priming of porous surfaces, dilute it 1:1 with clean water. To seal surfaces such as gypsum plaster, apply a first coat diluted 1:1 and then a second coat neat. Diluted primer should stay usable for several days; mix it well before use.
Can I use it on gypsum plaster before tiling?
Yes. Larsen recommends a first coat diluted 1:1 with water. Let it dry, then apply a second coat neat, without letting it pond. Two or more neat coats may be needed. Then apply cement-based adhesive once the primer has dried clear.
How long does it take to dry before I can tile?
You can tile or screed once the primer has dried clear, typically within 1–2 hours. It's touch dry in under an hour on porous substrates, and a second coat can go on after 2–4 hours at 20°C. If you need two coats, Larsen suggests one in the evening and one the next morning.
How much area does a litre cover?
Used neat, 1 litre covers approx. 7–10 m². Diluted 1:1 with clean water, 1 litre covers approx. 14–20 m². So a 5 litre pack covers roughly five times that.
Is it suitable for underfloor heating?
Yes. Larsen rates it for heated concrete and cement screeds, as long as the floor's surface temperature stays at or below 35°C.