Mordant Solution (T Wash)

(2 customer reviews)

A reactive chemical solution used as a pre-treatment for galvanised surfaces to aid the adhesion of subsequent coats of paint.

  • Blue solution that has a blackening effect on the galvanised surface indicating the treatment has been effective.
  • Excellent for the pre-treatment of galvanised steel and zintec sheeting prior to painting.

Please allow 1-2 working days for next day delivery of 25L items. This is due to the operation times of the hazardous goods vehicles of the external couriers.



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Product Description

Mordant solution is a T wash galvanised steel metal wash that contains a reactive chemical solution used to as a pre-treatment for galvanised surfaces which turns black and aids the adhesion of future coats of paint. Supplied as a blue solution that has a characteristic blackening effect on the galvanised surface. This helps in indicating that the treatment has been effective.

  • Formulated to a British Rail T wash mordant solution galvanised steel specification
  • Mordant solution is an excellent metal wash mordant solution for the pre-treatment and turn black galvanised steel and zintec sheeting prior to painting
  • Once treated, you can apply a wide range of paints to the surface.

GHS Flammable ghs 07 GHS 05 Classification Symbol


Not sure which whether to use mordant solution or etching primer? Take a look at our  Blog here

We are proud to be a member of the British Coatings Federation.

Technical Information

Weight 6 kg
Please Select Size

750 ml, 2 Litre, 5 Litre, 25 Litre

2 reviews for Mordant Solution (T Wash)

  1. Owen Davies

    Providing you take real care, as the label suggests, to degrease the surface, this works outstandingly well and better than an aerosol product I had previously purchased from a nationwide auto parts store!

  2. David Ritchie (verified owner)

    It at first appeared to be an unnecessary extra cost and processes. However, having previously experienced paint blistering reactions having painted directly onto what I thought were well seasoned galvanized surfaces even using the recommended primer undercoat and process.
    Applied this around 5 months ago in a 3 stage Mordant, Primer then Topcoat process and is looking good against a comparable now blistering primer/ topcoat without Mordant solution.
    Its a major costly job trying to sort out paint problems. Fortunately for me this time its only on a small comparison test area this time.

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