500ml Johnstone’s professional undercoat is a premium quality, alkyd-based undercoat formulated for interior and exterior use on wood and metal surfaces. It provides the perfect surface for overcoating with Johnstone’s professional gloss.

The colours displayed in the colour chart refer to the topcoat finish. By selecting a colour from the chart, we will be able to provide you with the correct undercoat base to achieve the result.

Superb application, coverage and opacity
Excellent adhesion and high film build
Perfect base for gloss
Coverage of 16-18 sqm per litre
Recoat in 16-24 hours

Do not apply over polystyrene surfaces.
More Information

We deliver local and nationwide any day except Saturdays, Sundays and Bank Holidays.

We will contact you via text the evening before with a 90-minute timeslot for your delivery, so you can plan your day.

If your order is within our designated area, then we will deliver it for FREE NEXT DAY (subject to availability and minimum order value).

Click here for our delivery areas and charges.

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Returns and Refunds Policy

In the unlikely event that a delivered product is faulty or damaged, we will exchange it or provide you with a full refund, as long as we are notified of the product’s fault within 48 hours of it being delivered to you.

Champion Timber shall not accept on return for credit any goods ordered from Champion Timber incorrectly or subsequently found to be surplus to the customer’s requirements. The suitability of specialist goods is assumed to have been assessed by the customer or his/her advisor(s) prior to purchase. Champion Timber shall endeavour to assist customers where possible by accepting at a reasonable restocking charge the return of goods (together with the original packing if applicable) which are from Champion Timber normal stock lines but goods ordered from the manufacturer cannot be accepted without Champion Timber prior agreement for the return and Champion Timber restocking charges having been paid. In any event, credit cannot be given unless the customer provides Champion Timber with the number of the invoice on which the goods were supplied.

View our full Returns and Refunds Policy.