Can this be used on melamine?

Wouldn’t have thought so. But if you scour the surface first, you might be lucky.

I have painted skirting boards were knots havent been sealed will this work to stop bleeding from knots coming back through

Not super impressed with this when trying to stop “greasy” leaking from decorator’s caulking. If it was me, I’d use original knotting compound which always works.

Do you have to do it over the entire wall or can it just be the patches? I was to repaint the whole wall in grey.

As long as the stain is dry. You can indeed touch up the affected areas. No need to do the whole wall.

How good is this over black mould in a bathroom? Tried several things and nothing works.

Use a brand called HG …. Mould spray works wonders, black mould literally disappeared after 30 minutes

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🖌️ Seal it, block it, perfect it — paint like a pro!

STRONGER PAINT BOND - Enhances adhesion and coverage, reducing the number of paint coats needed
SPEED UP YOUR PROJECT - Quick-drying formula cuts wait time, so you finish faster
TRUSTED PRO DIY CHOICE - Reliable, professional-grade results for renovation and restoration
VERSATILE SURFACE SEALING - Ideal for wood, plaster, concrete & more—one primer, endless possibilities
FLAWLESS FINISH EVERY TIME - Prevents stains from bleeding through for a pristine surface

Rustins Stain Blocker & Multi-Surface Primer (250ml) is a water-based, quick-drying primer designed to prevent stains from bleeding through paint while enhancing adhesion on a variety of surfaces including wood, plaster, and concrete. Offering coverage of 9-10 sq. meters per litre, it ensures a flawless matte finish indoors and outdoors, trusted by professionals and DIY enthusiasts alike for efficient, durable results.

$385

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TrustScore 4.5 | 7,300+ reviews

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Manufacturer	Rustins
Part Number	SBMP250
Product Dimensions	7.8 x 7.8 x 7.5 cm; 260 g
Item model number	SBMP250
Size	250 ml (Pack of 1)
Colour	White
Finish	Matte
Material	water based
Volume	0.25 litres
Item Package Quantity	1
Number of Pieces	1
Measurement System	Metric
Coverage	9-10 sq. metres/litre per coat, depending on the absorbency of the surface.
Special Features	Quick Drying
Usage	Interior/Exterior
Included Components	1 x Rustins Stain Block & Multi Surface Primer 250ml
Batteries included?	No
Batteries Required?	No
Item Weight	260 g

RUSTINS Stain Blocker & Multi-Surface Primer 250ml

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