Smooth & Tonal Finishes

1. OVERVIEW

A premixed, pre-pigmented interior wall & ceiling plaster, ready to mix with water apply and with traditional plastering skills and tools. 100% natural: all compostable.

2. SUPPLY

25Kg bags of dried plaster. Recyclable or compostable bags.

3. COVERAGE

7-8 square meters per bag with 2 x 1mm layers. Total 2mm thick.

4. OTHER ESSENTIALS

Clayworks Wall Primer & Clayworks Glaze (supplied by Clayworks with all clay orders plaster for additional cost).

5. APPLICATION

We strongly recommend application by an approved Clayworks plasterer. Where not possible, follow our application guidelines.

6. COLOURS

88 Standard colours. Custom colours available on request. UV Resistant.  Through pigmented.

7. COMPOSITION

Unique blends of unfired clays mixed with natural minerals and pigments.

8. SUBSTRATE

Most commonly applied directly onto gypsum plasterboard, masonry, blockwork, wood fibre board & wood wool carrier board. Can be applied directly onto Gypsum backing board suitably primed. Other substrates may require a backing coat. For details please also see our separate data sheet Clayworks Design Details.

Cannot be applied directly onto wood, including plywood, MDF or OSB.

9. RESTRICTIONS ON USE

Suitable for interior walls and ceilings and fixed furniture. Appropriate for bathrooms, but not wet or shower areas. We advise against use on items that will be moved around or doors. Not suitable for floors. Clayworks supply interior waterproof finishes and exterior grade finishes where a seamless match is required.

10. COUNTRY OF ORIGIN

UK. Manufactured in Cornwall.

11. FIRE

10. Fire: BS 476: Part 7: 1997 Surface spread of flame: achieved Class 1.

BS 476: Part 6: 1989 + A1: 2009 Fire propagation test: fire propagation index I = 0.5, i1 = 0.0

The results confirm that the plasters fulfil the following: UK Building Regulations: Class 0

Class 0 is defined as: BS 476-7 Surface spread of flame Class 1, and BS 476-6 Fire propagation index test (I < 12, i1 < 6)

12. HEALTH & SAFETY

As a powdered product a dust mask should always be worn when handling the product. Non caustic.

13. ACOUSTICS

Noise reduction coefficient (NRC): 0.10 NRC. Sound absorption coefficient: 0.090N

14. SUSTAINABILITY

Extremely low embodied carbon: 0.0677 kgCO2 e/kg. (LCA stages A1-A3. Full A1 – D. Assessment is available in our EPD). Product and packaging are fully compostable at all stages of lifecycle.

15. HEALTH

100% natural, Zero VOCs, formaldehydes, polymers or oils. Absorbs toxins, regulates humidity. No off-gassing.

16. MAINTENANCE

Can be wiped clean with a non-toxic cleaner when glazed. Seamless. Easily repaired. Fixtures, fittings, wall hangings as per any other plaster.

17. DRYING TIMES

Drying times – 2-3 hrs is between each layer.  24 hours for the entire finish to dry.

18. DENSITIES

Dried low g/L high g/L
1137.581 1573.407
Applied. g/l kg/m3 Thickness (mm) kg/ m2
1270 1270 2mm 2.5

19. IMPACT

BS EN 520 – Impact Diameter < 15mm.

20. THERMAL CONDUCTIVITY

0.84 W/mK

21. MOISTURE BUFFER

Buffer value: 1.28

22. LIGHT REFLECTIVE VALUE

Tested to BS.8493:2008+A1:2010. Ranges from 37.5 (Blue) to 60.5 (White).

23. DIRECTIONS FOR STORAGE

Keep dry, do not pierce bags. Any left over material should be kept in sealed containers for future repairs or use.

 

Data sheet last revised: July 2021

NBS Source: Find – Select – Specify