Johnstone's Trade Stormshield Flexible Primer Undercoat Paint

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Johnstone's Trade Flexible Primer Undercoat Paint is an easy and quick product to use with it being both a primer and undercoat in one. As part of the Stormshield range the Flexible Primer Undercoat is a premium range exterior primer which has up to an 8 year life expectancy - depending on conditions.

Perfect for use with other Johnstone's Stormshield products such as the Flexible Gloss and Flexible Satin topcoats, this Johnstone's Flexible Undercoat has a quick-drying time and gives a smooth finish every time. It retains flexibility longer than traditional undercoats and is microporous & crack resisting.

Can be used on softwood, hardwood and plywood panels, also can be used on suitably primed metal surfaces. Available in White & Grey.


All surfaces to be painted should be clean, dry and free from loose and flaking material. To obtain maximum performance from this microporous product, old paint and varnish should be completely removed.


Ensure maximum ventilation during application. Stir well. Easy to apply by brush.

Years of Protection: 8

Coverage (m2) per Litre: 11

Brand: Johnstone's Trade

Base: Solvent

Paint Application: Brush

Suitable Substrate: Exterior Woodwork, Metal, Timber, Softwood, Window Frames

Drying Time: Recoat After 16-24 Hours

Technical Data: Click Here

Safety Data Sheet: Click Here

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Free Delivery:

  • UK delivery is free for orders over £50 subject to exclusions which an be found here.
  • Free delivery is also available in other countries and regions, please see here from more information.

Same Day Dispatch:

  • Next working day orders placed before 1pm Mon-Fri will be dispatched same day.
  • UK Wallpaper samples ordered before 1pm will typically be dispatched same day on a 48hr Royal Mail service.

Next Working Day Delivery:

  • Our next day service is for weekdays only and therefore Orders must be placed before the 1pm Mon-Thurs for next day delivery.
  • Next day orders placed on Thursday evening or Friday before 1pm will be delivered the following Monday.
  • A Saturday and Sunday delivery service are also available if you need your order sooner.

Pattern Book Wallpapers:

  • The majority of our wallpapers are kept in stock, however a small selection of papers are supplied to order and therefore have a longer delivery lead time, typically upto 7 working days. This will be made clear within the product description where applicable.

Delivery Charges & Timing:

Service Cost Lead Time
Standard Delivery (UK Mainland) £4.95 2 Working Days
UK Wallpaper Sample Delivery Free 3 Working Days
UK 1 or 2 Tester Pots £3.00 2 Working Days
UK Next Working Day Delivery (when ordered weekdays before 1pm) £7.95 Next Working Day
UK Saturday Delivery (when ordered Friday before 1pm) £9.95 Saturday
UK Sunday Delivery (when ordered Friday before 3pm) £9.95 Sunday

For NI, Highlands & International delivery rates and information please click here.