Dulux Precision Stain & Mould Blocker helps you stop unsightly stains before they ruin your paint finish. First, it locks in oil, grease and mould stains so they don’t come through your topcoats. Then, because it’s water‑based with low odour, you can apply it easily indoors or outdoors without harsh fumes. Plus, it inhibits future mould and mildew growth, making it a smart choice for damp areas.

You can roll, brush or spray this stain blocker. It dries quickly and lets you recoat sooner, helping you finish projects fast and with confidence.

Key Features & Benefits

• Blocks stains before topcoats — prevents oil, grease and mould stains from showing through paint.

• Inhibits mould and mildew growth — helps keep surfaces cleaner longer.

• Water‑based and low odour — easier to apply indoors and outdoors with less smell.

• Fast drying — touch dry in ~20 min and ready for recoat in ~2 hrs.

• Versatile application — suitable under Dulux topcoats on walls, ceilings, timber, render, masonry and more.

• Easy cleanup — tools rinse clean with warm soapy water after use.

How to Use

First, remove as much existing stain as possible using cleaning or light sanding. Next, ensure the surface is clean, dry and sound. Then apply an even coat with a brush, roller or spray. Finally, let it dry before adding your chosen Dulux topcoat.

Use this product when you need to block and lock in stubborn stains and improve the performance of subsequent coatings on interior and exterior surfaces.