Etch Guard T-Wash 5Ltr
SKU:
10043105
The PPG Sigma Etch T-Wash 5 Litre is a phosphoric acid-based mordant solution designed to chemically pre-treat new and unweathered galvanised steel before painting. It reacts with zinc to produce a grey-black surface, providing a clear visual indication of treatment and helping subsequent coating systems achieve effective adhesion.
Features & Benefits
» Specialist chemical pre-treatment designed for new, unweathered galvanised steel and Zintec surfaces
» Phosphoric acid and reactive copper salt formulation chemically etches zinc surfaces in preparation for painting
» Changes from a pale blue solution to a grey-black or black finish when reacting with zinc, providing a visible indication of treatment
» Provides an effective alternative where mechanical abrasion or blast preparation is impractical
» Ready-to-use formulation requires no thinning before application
» Can be applied using a brush, clean sponge, rag or suitable dipping process
» Theoretical coverage of approximately 15m² per litre provides economical treatment of large galvanised surfaces
» Application equipment can be cleaned using fresh water after use
» Suitable for industrial, structural steelwork, fabrication and maintenance coating preparation applications
Technical Specifications
» Brand: PPG Sigma
» Product Name: Sigma Etch T-Wash
» Former Product Name: Amercoat 59TW
» Product Type: Mordant Solution / Galvanised Steel Pre-Treatment
» Pack Size: 5 Litres
» Base Chemistry: Phosphoric Acid and Reactive Copper Salts
» Liquid Colour: Pale Blue
» Reaction Colour: Grey-Black / Black
» Density: Approx. 1.0g/cm³
» VOC Content: Maximum 335g/L
» Flash Point: 34°C
» Theoretical Coverage: Approx. 15m² Per Litre
» Application Methods: Brush, Sponge, Rag or Dipping
» Thinning: Do Not Thin – Ready To Use
» Tool Cleaning: Fresh Water
» Minimum Overcoating Interval: 2 Hours At 20°C
» Maximum Overcoating Interval: 2 Days
» Suitable Surfaces: New Unweathered Galvanised Steel and Zintec Sheeting
» Standards: British Rail T-Wash Specification and Highways Item No. 155
» Limitations: Not Recommended For Continuously Immersed Structures
