*PPG Sigma Etch, T-Wash

This product has now been discontinued. Please contact our Technical Team on 01462 421333 to discuss possible alternatives.

PPG Sigma Etch Amercoat 59TW, T Wash or also known as Mordant Solution, is a phosphoric acid based etch solution for treating new un-weathered galvanised surfaces prior to painting.

Suitable for use for pre-treatment of new galvanised steel where blasting or abrasion is not possible. Highways Item No. 155.

Best Uses

PPG Sigma Etch is a high quality etching solution that can be used to give adhesion of high temperature coatings to new galvanised steel that lacks abrasion. As well as this, Sigma Etch can be used as part of a wide range of protective coating systems that can be over coated with many different primers and topcoats.

Application

PPG Sigma Etch is a pale blue solution which blackens after application to indicate the effectiveness of the primary treatment and can be applied easily using a paint brush. Sigma Etch (T Wash) has a theoretical coverage rate of 15m2 per litre.

Surface and Environment

Sigma Etch mordant solution can be used on all clean, galvanised substrates to etch the surface and provide adhesion, ideal for preparing the substrates ready for a protective and decorative coating.