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PPG Sigma Sigma Etch (mordant solution, T Wash) 5L DISCONTINUED

DISCONTINUED - search mordant for alternatives 
MPN: 131931
£50.48 (inc. VAT)
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PPG Sigma Etch solution (also known as mordant solution, T Wash, acid etch) is a phosphoric acid based etch solution for treating new un-weathered galvanised metal before adding a protective and decorative topcoat.

PPG Sigma Etch (formerly Amercoat 59TW) can be used to pre-treat new galvanised steel where blasting or abrasion is not possible.

It is a high quality etching solution that promotes the adhesion of high temperature coatings to new galvanised steel. Sigma Etch can also be used as part of a wide range of protective coating systems that can be overcoated with many different primers and topcoats.

PPG Sigma Etch is a pale blue solution which turns black after application to show the effectiveness of the treatment. It can easily be applied with a paint brush. Highways Item No 155.

Over-application will produce a dense black powdery layer which is unsuitable for the application of a topcoat. Such areas will need abrading or washing to remove the powdery deposits or the adhesion of the topcoat will be adversely affected.

Application (at 20C):

  • Stir well before use
  • Apply with brush (roller can also be used)
  • Recoatable: 2 hours
  • Coverage: 15m2 per litre at 0 microns
  • Recommended thinner: not needed

Call us on 01753 686888 or email info@tools-paint.com for more information.

Data sheet and MSDS available on request.

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