I’ve used a fair few adhesion promoting primers over the years with Zinsser 123 and Mythic MP being the best.
The Mythic is a great product but tends to dry a little flat for me which doesn’t help the first topcoat apply easily.
The Zinsser has the slight sheen I’m looking for but can’t rival Mythic for opacity.
I’ve been convinced that no UK manufacturer can top these US made products for performance, until now that is.
I’ve just come across a Johnstone’s Trade product called Ultra Primer. Must admit after buying a litre I wasn’t sure it could match the above products but I was very impressed with the performance.
It looks thick in the can but applied and levelled very well, though I did use a little Zamix Extender in it. Opacity was good, much better than the Zinsser, and it dried with a slight sheen.
When applied on previously oil painted trim adhesion is excellent. With only a light sanding needed.
The whiteness isn’t in Mythic’s league but I had no problem applying one coat of Ultra and one coat of Dulux Trade Diamond Satinwood to an old, discoloured, enamelled radiator and the job was finished.
It’s nice to see UK manufacturers realising the need for these type of products and even better that they are performing as well as this one.