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Watco Chemi-Coat

A high build epoxy resin with excellent chemical resistance

  • Only one coat required
  • Suitable for walls and floors
  • Takes heavy traffic
  • High resistance to aggressive chemicals

Frequently bought together

Total price

£222.10 (Ex VAT)

This item: Chemi-Coat LIGHT GREY, 4L £161.10 (Ex VAT)


Watco Chemi-Coat® is a one coat high build epoxy resin coating which offers excellent durability and chemical resistance. Provides a superb glossy, hygienic and easily cleaned surface. A single coat is usually sufficient. Very porous surfaces should be treated first with Watco 4 Hour Epoxy Primer.


  • Excellent resistance to many chemicals
  • Suitable for a variety of floor and wall surfaces
  • Low solvent content
  • Approved for use on sand and cement screed or concrete with under floor heating systems (up to 30°C surface temperature)
  • Coverage approx. 18m² per 4L pack maximum allowing for one coat by roller. Brush application may result in reduced coverage
  • One coat normally sufficient
Properties Excellent resistance to many chemicals, low solvent content, high build epoxy resin, excellent durability.
Appearance Gloss.
Surfaces Floors.
Interior or Exterior Interior.
Primer required Yes on very porous surfaces.
Coverage 18m² per 4L pack maximum allowing for one coat by roller. Brush application may result in reduced coverage.
Recommended number of coats 1
Pot time (hours) 1 hour at 15°C.
Curing time 16 hours for light traffic, 24 for normal traffic at 15°C.
Minimum application temperature 15°C.

Surface preparation

Concrete and Brick - concrete to be treated must be dry, at least four weeks old and free of any soft surface laitance, contaminants, and not subject to rising damp. All loose material should be removed. Very smooth bare concrete or concrete with soft surface laitance should be etched with Watco Etch & Clean and the area thoroughly hosed off and allowed to dry. Grease or oil should be removed with Watco Bio D (or a similar degreasant) and the area thoroughly hosed off and allowed to dry. Very smooth previously painted surfaces should preferably be abraded to improve adhesion.

Steel - remove loose or flaking material, rust and any previous coatings by wire brushing or disc grinding to achieve a bright surface. Oil or grease should be removed with Watco Bio D and the metal then washed with water and allowed to dry. Coating should be carried out immediately providing flash rusting has not occurred.


Each Chemi-Coat pack consists of a container of curing agent and a container of resin. The curing agent and resin must be very thoroughly mixed together with a wide bladed tool until an even colour is obtained. 

Important: Once the contents of the pack have been mixed a chemical reaction takes place which causes a rise in temperature and speeds up the curing of the product.


If appearance is critical we recommend the application of a small trial area first.

Best results are obtained in warm conditions, (minimum 15°C). On horizontal surfaces apply with a medium pile type roller (not foam) in one coat. On vertical surfaces two thin coats are recommended. The second coat should be applied within 24 hours.

£161.10 (Ex VAT)

In stock

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Tools and accessories

12" Roller Frame & Handle

12" Roller Frame & Handle

A sturdy roller applying floor coatings

From £7.70  (Ex VAT)

Watco Bio-D

Watco Bio-D

A heavy duty biodegradable cleaner for floor preparation

From £20.00  (Ex VAT)

Watco Etch & Clean

Watco Etch & Clean

Essential for preparing bare concrete ready for painting

£24.20  (Ex VAT)

Help & Advice

Contact our friendly and professional Technical Advisors for expert help and advice for your project. You can give us a call on 01483 418 418 or email

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