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.
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.
PPG Sigma Etch is a pale blue solutions 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.
- Highways Agency Item No.155
- Meets the requirements of Network Rail's Mordant Solution 't-wash' solution
- PPG Sigma Etch Amercoat 59TW, T Wash or also known as Mordant Solution
- May be over-coated with a wide range of protective coating systems
- May be used to give adhesion of high temperature coatings to new galvanised steel
- Changes colour on application from blue to black to indicate the effectiveness of primary pre-treatment
- Not recommended for immersed conditions
|Type:||Phosphoric Acid Based Etch Solution|
|Stock Colours:||Pale Blue which turns Grey-Black on application to clean galvanized surfaces|
|VOC Content:||335.0g per Litre|
|Suitable Substrates:||For pretreatment of new galvanized steel|
|Application Method:||Brush, Roller|
|Theoretical Coverage:||15 m2 per litre at 0 microns|
|Wet Film Thickness (WFT):||-|
|Dry Film Thickness (DFT):||-|
|Overcoatable:||Between 2 hours and 48 hours at 20°C|
|Cleaner / Thinner:||-|
|Shelf Life:||at least 12 months when stored cool and dry|
|Packaging:||Available in 5 Litres|
The manufacturers data sheets are available for download from this website. It is your responsibility to read and understand all aspects of the data sheets before you place an order and prior to application. Please pay special attention to the preparation, mixing and application temperatures of the product, cleaning of substrate and environmental factors such as temperature, rain etc. Quoted coverage rates are based on the manufacturers theoretical rates and may vary depending upon substrates absorption, texture and application. We always recommend a test is carried out to ensure suitability.
Customer further agrees that Promain have no liability for any errors or omissions contained within the Product Data Sheets and are not liable for failure due to misapplication or inadequate substrate cleaning and preparation. For more information please refer to our Terms & Conditions.