Dulux Precision Stain & Mould Blocker is a water based, fast drying, powerful stain blocker for a wide range of oil based stains. It has been specifically formulated to inhibit mould & mildew growth.


  • Water based
  • Inhibits mould & mildew growth
  • Ideal for oil, grease & mould stains
  • Available in 1L, 4L


  • Stops stains migrating thereby preventing discolouration of topcoats
  • Powerful stain blocking with mould & mildew inhibitors
  • Touch dry 20min, re-coat 2hrs
  • Low odour
  • Suitable for use under Dulux topcoats
  • Made in New Zealand

Product code: 50SX390A


Use on interior & exterior surfaces including paper-faced plasterboard, timber, MDF, chipboard, plywood, aged enamel, brick, render, masonry, concrete, cement sheet, Zincalume®, galvanised iron, uPVC, aluminium, previously painted surfaces and suitably primed steel. Blocks oil based stains such as food & beverage, grease, graffiti, crayon, rust, lipstick, markers, ink & mould stains.

Surface preparation

Remove as much of the stain as possible by cleaning with Selleys® Sugar Soap, sanding or, scraping. PREVIOUSLY PAINTED SURFACES Scrape off loose and flaking paint. Wash with Selleys® Sugar Soap, to remove grease and grime. Fill nail holes and cracks with a suitable filler, then sand smooth. BARE TIMBER INCLUDING WEATHERBOARDS & HARDBOARDS Sand bare timber to a clean surface and dust down. Fill nail holes and cracks with suitable filler, then sand smooth and dust off. CHALKY SURFACES Sand back to a strongly bound surface and dust off. HIGH GLOSS OR HARD, AGED ENAMEL SURFACES If required sand to a dull finish. PLASTERBOARD, MASONRY, MDF, RENDER, CONCRETE, CEMENT SHEET, SUITABLY PRIMED STEEL, GALVANISED IRON & ZINCALUME® Fill holes and other imperfections with a suitable filler, sand and dust off. Allow cement render and concrete to properly cure before priming.

Product downloads

Approx. 12m2/L depending upon the porosity of the surface.
Paper faced plasterboard, Timber, MDF, Chipboard, Plywood, Aged Enamel, Render, Brick, Masonry, Concrete, Cement Sheet
Wall, Ceiling
Bedroom, Living room, Hallway, Dining room, Laundry, Cladding, Bathroom, Kitchen
Application Method
Roller, brush, spray.

Health Safety

Clean Up
Clean brushes and equipment with warm, soapy water.