Is Johnstones Trade Flexi Satin suitable for old UPVC frames?

Johnstones trade stormshield flexible satin is a premium quality microporous satin paint for exterior surfaces that offers high durability.

Always use primer first coat

Johnstones Trade Flexi Satin is a good option for UPVC window frames as it's flexible and durable. It's designed for exterior wood and metal, but it can also adhere to UPVC without the need for a primer, provided the surface is properly cleaned and lightly sanded for better adhesion. Many decorators use it with success on UPVC for a modern, refreshed look. Just make sure to follow the preparation instructions carefully for the best results.

Johnstones Flexi Satin does a brilliant job but no primer is a bit risky if the surface is not sanded to make a bit of key to help the paint adhesion .

I'm not a big fan using a Johnstone product. For UPVC you need to prime first, otherwise the paint will not stick to the surface. Depending on budget I'm using a benjamin moore, jenolite upvc, but ronseal upvc does a pretty good job too.

Johnstone's Trade flexi satin will work fine on UPVC windows but I would always recommend applying a primer first to aid adhesion. Furthermore, be sure to clean down the surfaces first to remove any dirt or grime, followed by giving it a light sand with a fine-medium grit sandpaper.

I would only use a zinnser all coat all bedec multi surface paints,which can be applied by brush

I personally wouldn’t agree with this. I use 2k polyurethane paint on top of a 2k primer, the upvc has to be thoroughly cleaned, sanded, primed and finished. Zinnser is also a paint which can be used, it must e built up in multiple coats, personally I don’t think it has the durability or longevity of the 2k paint

Yes, Johnstone’s Trade Aqua Guard Flexi Satin can work on old uPVC frames, but you’ll need to prepare the surface properly to ensure good adhesion and long-lasting results.

Key Considerations:
Adhesion: uPVC is non-porous and can be tricky for standard paints to bond to. Johnstone’s Flexi Satin is designed for flexible surfaces, but it’s primarily for woodwork, so extra prep is crucial.

Durability: uPVC expands and contracts with temperature changes. A dedicated uPVC paint (like Zinsser AllCoat or Bedec MSP) may give better long-term results.