Crown Trade PX3 Review – Adhesion Primer

Updated May 27, 2024 | Posted Oct 4, 2020 | Product Reviews, Paints | 2 comments

Crown Trade PX3 is a solvent based, stain blocking & adhesion promoting primer for interior & exterior use. Ideal for difficult surfaces including glass, tiles, melamine and previously painted surfaces, as well as most wood and non-ferrous metals. It also has excellent stain sealing properties and can be used on most surfaces subject to staining by smoke, crayon, tannin, water stains.

px3 come in two tin sizes 1litre and 5litre tins and is only available in an off-white colour. Unfortunately, it cannot be tinted, which is a shame. Click here to see online prices.

My Crown Trade PX3 Review


I found px3 to be quite thin even after a good mix up. It reminded me of the type of oil-based primer that we used to use years ago. I have used px3 on some previously varnished windows and doors and I found it went on fine, but the opacity wasn’t the best. The technical information states that under normal circumstances it dry within 4 hours and recoat able after 16 hours. But I found even the next day the px3 primer was still slightly tacky and needed a little while longer to dry off before it could be rubbed down.  This is the only downside to using solvent based paints.

The px3 performed exactly how I would expect it to do. Once it was dry I performed a scratch test to see how it would fair and as expected, it passed with flying colours. I have also tested Crown Trade PX3 on tile and melamine and again, it stuck hard and fast. This really is a good quality adhesion primer!!


Now comes probably the most talked about situation between decorators, do you use oil-based or water-based, and in my opinion with the px3 and px4 being identical in performance, even though the PX4 is a water-based. I would have to say I prefer the px4 as its dries so much quicker and there’s no washing out brushes and rollers in white sprit. Both are available from Crown Decorating Centres.

I can see the point in opting for an oil-base, as this type of product will also block tannin and other nasties from bleeding through your paint film. For this reason, Crown PX3 primer is perfect for priming old stain or varnish before painting with a satinwood or gloss. Just allow for plenty of time to dry. Click here to see online prices.

Review Summary

Crown Trade PX3 Review - Adhesion Primer - Decorator's forum UK

A solvent-based adhesion primer and stan block in one. You can use this paint inside or out.

Product Brand: Crown Trade

Editor's Rating:


  • Good adhesion.
  • Good opacity.
  • Easy to use.
  • Grips well.
  • Works well as a stain block.


  • I prefer water-based, but as an oil-based option, this is fantastic.

Updated May 27, 2024 | Posted Oct 4, 2020 | 2 comments

About the Author

About the Author

Mike Cupit has been in the decorating industry since 2002 and has mostly worked as a Trade Decorator in the domestic sector (peoples’ homes). Self-proclaimed “product geek”, Mike has a passion for paint and decorating tools. Mike now spends most of his time testing paint products and tools, comparing them to similar products on the market, and blogging about the industry in general.


  1. Martin mc aleenan

    Can the px3 primer be painted on ceilings before painting them with with white paint.

  2. Nigel Magill

    Definitely not impressed with this product, no were near as good as alkali resisting primer. Takes a long time to cure, the alkali primer would hard in no time.


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