Sherwin Williams Sher-Cryl M770 - Formerly Leighs Envirogard

Non Hazardous
A water based, quick drying gloss acrylic finish or sealercoat for Sherwin Williams FX Firetex intumescent product range.
Available in 5 Litres
From £149.52 £124.60
In stock
Only %1 left
Product Description

Sherwin Williams Sher-Cryl M770 (Formerly Leighs Envirogard M770) is a water-based, quick drying gloss acrylic finish or sealer coat for Sherwin Williams Firetex FX intumescent product range.

Best Uses

Sherwin Williams Sher-Cryl M770 is recommended for use in enclosed or poorly ventilated areas where solvent emissions are not desirable. Sher-Cryl can also be used as an essential decorative sealer coat for Sherwin Williams FX product range to provide resistance to moisture.


Ensure surfaces to be coated are clean, dry and free from all surface contamination. In conditions of high relative humidity good ventilation conditions are essential. Substrate temperature shall be at least 3ºC above the dew point and always above 0°C. Application is recommended via airless spray, conventional spray, brush or roller. In common with other water based materials, drying of this material is retarded by high humidity conditions.

Lack of air movement also slows down the process, and under such conditions it is advisable to introduce some method of circulating air over the coated surface to speed up the drying. Indefinitely self recoatable.

The recommended cleanser or thinner is water.

Technical Details


  • BS476 Part 7 Surface Spread of Flame Material - for details of substrate/scheme, consult our technical team
  • NATO Approval No. 8010-99-517-5228 (BS4800  00A01  5 Litres)
  • NATO Approval No. 8010-99-231-3852 (White 5 Litres)

Technical Info:

  • A minimum ambient air temperature of 7°C is required to ensure proper film formation
Components: Single Pack
Type: Water Based
Finish: Gloss
Stock Colours: White
Tintable: Yes, limited range of shades. Please note, bespoke tints are non refundable / exchangeable
VOC Content: 71 gms/litre
Volume Solids: 39 ± 2%
Suitable Substrates: Sealercoat for the entire FX product range.
Application Method: Brush, Roller, Airless Spray or Conventional Spray
Theoretical Coverage: 11.1 m2/ltr
Wet Film Thickness (WFT): 90 microns
Dry Film Thickness (DFT): 35 microns
Induction Time: -
Pot Life: -
Touch Dry: 15 minutes at 23°C
Overcoatable: 3 hours at 23°C
To Handle: 3 hours at 23°C
Cleaner / Thinner: Water
Shelf Life: 18 months from date of production unopened or 'use by' date where specified
Packaging: Available in 5 Litres

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