Coating systems

Stain blocking and sealing across Hampshire

If a stain has come back twice, the paint is not the problem — the barrier is missing. Across Hampshire we seal first and decorate second.

Landlords, letting agents, licensed trade and homeowners dealing with stains that keep reappearing.

Stain-blocking and sealer systems carried out by Dynamic Decorating across Hampshire

What the system is

Stains bleed because the contaminant is soluble in the new coating. The fix is a barrier: a solvent- or shellac-based blocker for nicotine and heavy water staining, a water-based blocker where odour matters, and a full-surface seal rather than a spot patch on widespread contamination. Two thin blocker coats beat one thick one.

Preparation this system depends on

  • Source of water ingress confirmed as resolved before sealing
  • Surface washed down to remove soluble deposits
  • Contaminant identified — nicotine, tannin, water, soot or marker
  • Blocker chosen for the contaminant and the odour tolerance of the room
  • Two thin blocker coats rather than one heavy application
  • Full-surface sealing where patching would show

Where it is usually specified

  • Ceilings marked by historic leaks
  • Nicotine-stained walls and ceilings in ex-licensed or ex-smoker properties
  • Tannin bleed on knotty softwood joinery
  • Fire and smoke damage redecoration
  • Graffiti and marker pen on internal walls
  • Rental voids handed back heavily marked

Trade-offs worth knowing before you commit

  • Sealing before the leak is fixed wastes the work
  • Solvent-based blockers smell strongly and need ventilation planning
  • Heavy nicotine may need washing down as well as sealing
  • Spot-blocking on a large ceiling can flash under artificial light
  • Odour, not just staining, sometimes needs the full-surface approach

Questions we get about stain blocking

Why does the water stain keep coming back on my Hampshire ceiling?

Because ordinary emulsion is water-borne and the stain is soluble. Without a blocker the mark simply re-dissolves into each new coat.

Can you deal with heavy nicotine staining?

Yes — usually a wash-down followed by a full-surface blocker. In heavily contaminated Hampshire properties spot treatment leaves visible patches and lingering odour.

Do stain blockers smell?

Solvent-based ones do, strongly. Where a the Portsmouth and Southampton area property is occupied we will use a water-based blocker if it will hold, or plan ventilation and access hours if it will not.

Is the leak my responsibility to fix first?

It needs fixing before we seal. We will still survey and quote, but we will not seal a surface that is still getting wet.

Will one coat of blocker do?

Two thin coats work better than one heavy coat, and dry properly between passes. That is how we specify it on Hampshire jobs.

Can you turn around a marked rental void near Portsmouth?

Yes. Sealing is quick once the surface is clean and dry, and it stops the next tenant seeing ghosts of the last one.

Photograph the staining at your Hampshire property and we will identify the contaminant and the right barrier.

Stains need a barrier, not another coat. That is the whole principle behind this work in Hampshire.

Start your project

Planning a commercial painting or decorating project?

Speak to a Hampshire commercial decorating contractor that turns up, communicates clearly and delivers a finish that lasts.