PPG Sigma Etch (T Wash)

This product has been discontinued; for an alternative product please look at;
Guard T Wash

Description

Phosphoric acid-based etch solution for treating new, un-weathered galvanized surfaces prior to painting

Principal Characteristics

• For pre-treatment of new galvanized steel where blasting or abrasion is not possible

• May be overcoated with a wide range of protective coating systems

• May be used to give adhesion of high-temperature coatings to new galvanized steel

• Changes color on application from blue to black to indicate the effectiveness of primary pretreatment

• Meets the requirements of British Rail's 'T-wash' solution

• Not recommended for immersed conditions

Colour and Gloss Level

• Pale blue solution, which turns gray-black on application to clean galvanized surfaces