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Watco Chemi-Coat Acid Strength

Exceptional resistance to concentrated acid spills

  • Resists up to 98% sulphuric acid
  • High build, one coat application
  • Glossy wipe clean surface
  • Heavy duty 100% solid epoxy formula

Frequently bought together

Total price

£243.50 (Ex VAT)

This item: Chemi-Coat Acid Strength MID GREY, 4L £182.50 (Ex VAT)


Watco Chemi-Coat® Acid Strength is a virtually solvent free, one coat epoxy resin industrial paint. 


  • A single coat is usually sufficient. Very porous surfaces should be treated first with Watco 4 Hour Epoxy Primer
  • Resists up to 98% strength Sulphuric Acid
  • Thick coating is ideal for chemical bund areas
  • Smooth, glossy, wipe clean surface
  • Heavy duty high build formula
  • Approved for use on sand and cement screed or concrete with under floor heating systems (up to 30°C surface temperature)
Properties Excellent resistance to many chemicals, solvent free, high build epoxy resin, excellent durability.
Suitable for Floors.
Finish Gloss.
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.
Number of coats 1
Curing time 16 hours for light traffic, 24 for normal traffic at 15°C.
Minimum application temperature 15°C.
Pot life 1 hour at 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.

Case studies

£182.50 (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 Painting Kit

Watco Painting Kit

Everything you need to help with floor painting

From £41.00  (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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