Johnstones Trade Mordant Solution

A preparation product for readying galvanised metal surfaces before applying topcoats.
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Mordant Solution : - is a Pre-treatment for galvanised steel which converts the surface nature to ensure the subsequent adhesion of a wide range of coatings. Use by thoroughly working Johnstone's mordant solution in to the surface using a brush, ensuring all of the surface changes colour (blackens). If no initial reaction takes place then a second application may be required. Rinse with clean water and allow to dry.