Is Johnstones Trade Flexi Satin suitable for old UPVC frames?

Johnstone's Trade Stormshield Flexi Satin is designed for exterior wood, not directly for smooth uPVC. For uPVC window frames, using a dedicated adhesion primer first or a paint specifically formulated for uPVC is essential to stop peeling.
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Johnstone’s Trade Flexi Satin is primarily designed for exterior woodwork and is not recommended directly on uPVC without a proper bonding primer. uPVC is non-porous, so applying it without a primer will likely cause peeling and poor adhesion over time.
For a durable finish on old uPVC frames, follow these steps:
1. Clean & Prep: Thoroughly clean the frames with a degreaser/solvent cleaner (or sugar soap) and lightly abrade them with fine sandpaper or Scotch-Brite to create a key.
2. Apply Adhesion Primer: Coat the plastic with a high-adhesion bonding primer like Zinsser Bullseye 1-2-3, Zinsser VIP, or Bedec MSP.
3. Topcoat: Once primed, you can apply Flexi Satin or a specialist uPVC/multi-surface paint (like Kolorbond or Bedec) for a long-lasting finish.

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.

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

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

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'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.

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 .

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.

Always use primer first coat

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