Exterior Quick Dry Primer Undercoat



Coverage (per litre)

12 m²

Dry Time

30 Minutes

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Professional Painter

Product Details

Johnstone’s Exterior Quick Dry Primer Undercoat has been specially developed to be used in conjunction with Johnstone’s Exterior Quick Dry Satin. It provides an exceptionally long lasting finish for exterior wood and metal. The water based formula resists blistering, cracking and peeling and has low odour and quick drying properties. For an optimum 6 year life use with Johnstone’s Exterior Quick Dry Satin.


  • Weather protection
  • Crack and peel resistance
  • 6 Year Life
All surfaces should be clean, dry and free from grease. Remove any loose or flaking paint. Treat any mould or lichen with a fungicidal wash as directed. Sand smooth natural planed wood and wipe clean with white spirit to remove any natural oils or resins and allow to dry. Rub down bare timber and sound glossy surfaces with fine waterproof abrasive paper and rinse thoroughly to provide a key. Apply a suitable knotting solution to knots and resinous surfaces. Prime metal surfaces with an appropriate Johnstone’s primer. Avoid the inhalation of dust. Wear a suitable face mask if dry sanding. Special precautions should be taken during preparation of pre-1960s paint surfaces over wood and metal as they may contain harmful lead
Ensure maximum ventilation during application and drying. Stir well before use and apply by brush or roller. Apply one coat of Johnstone’s Exterior Quick Dry Primer Undercoat followed by two coats of Johnstone’s Exterior Quick Dry Satin. The surface will be touch dry in 30 minutes, allow 1 to 2 hours drying between coats under normal conditions. For maximum performance Johnstone’s Exterior Quick Dry Primer Undercoat and Satin should be applied as a system to pre-treated bare surfaces. Do not apply when the air or surface temperature is below 10ºC or in damp conditions.
Replace lid firmly after use. Remove as much product as possible from application equipment before cleaning. Clean all equipment immediately after use in warm soapy water and rinse thoroughly.
To avoid the risk of spillage, always store and transport in a secure upright position.
Do not empty waste paint into drains or watercourses. Some local authorities have special facilities for the disposal of waste coatings.