# Dulux Damp Seal Primer & Undercoat

Primer, undercoat and sealer · Dulux

Dulux Damp Seal Primer & Undercoat covers up to 8 m² a litre, by Dulux's own figures.
Source: Dulux, Dulux Damp Seal Primer & Undercoat product page, read 11 October 2026.

Dulux gives no single number of coats for it in the document read for this page.

What it is for, in the maker's words: “Dulux Damp Seal covers damp or water stains on walls and ceillings whilst also preventing the stain from reappearing” (Dulux Damp Seal Primer & Undercoat product page, read 11 October 2026).

## Coverage

Dulux states up to 8 m² a litre. The maker's words: “Up to 8m2/litre”.
- Bare, rough or absorbent surfaces: A maker's coverage is their best case, on a smooth sealed surface: bare, rough or absorbent surfaces take more.
- Waste and touch-ups: The tin-by-tin figures add nothing for what stays in the tray and on the brush, or for touching up.

## Coats

The document read for this page gives no number of coats for Dulux Damp Seal Primer & Undercoat. Follow the tin's own instructions.

## Tin sizes

| Tin | One coat | Two coats |
|---|---|---|
| 750 ml | up to 6 m² | up to 3 m² |
| 2.5 L | up to 20 m² | up to 10 m² |

Arithmetic on the maker's figure: the litres in the tin times the coverage per litre, with nothing added for waste.

## Where to buy it

The page has the shops' own searches for it, and any link there that is paid for is marked Ad: https://buildbatch.co.uk/products/dulux-damp-seal-primer-and-undercoat/#where-to-buy. BuildBatch sells nothing and compares no prices.

## Questions

**How much does a litre of Dulux Damp Seal Primer & Undercoat cover?** Dulux states up to 8 m² a litre for Dulux Damp Seal Primer & Undercoat (Dulux Damp Seal Primer & Undercoat product page, read 11 October 2026). A maker's coverage is their best case, on a smooth sealed surface.

**How much does a 2.5 litre tin of Dulux Damp Seal Primer & Undercoat cover?** At the maker's figure a 2.5 L tin covers up to 20 m² in one coat, or up to 10 m² in two coats. That is the litres times the coverage per litre, with nothing added for waste.

**How many coats does Dulux Damp Seal Primer & Undercoat need?** The document read for this page gives no number of coats for Dulux Damp Seal Primer & Undercoat. Follow the tin's own instructions.

**What is Dulux Damp Seal Primer & Undercoat for?** Dulux says: “Dulux Damp Seal covers damp or water stains on walls and ceillings whilst also preventing the stain from reappearing” (Dulux Damp Seal Primer & Undercoat product page, read 11 October 2026).

**What tin sizes does Dulux Damp Seal Primer & Undercoat come in?** The catalogue lists 750 ml and 2.5 L. A shop may not stock every size.

## Where the figures come from

- Dulux, Dulux Damp Seal Primer & Undercoat product page (https://www.dulux.co.uk/en/products/dulux-damp-seal-primer-and-undercoat): coverage and what it is for, read 11 October 2026.

Written with AI tools; not yet checked by a tradesperson. Follow the tin's own instructions.

The page: https://buildbatch.co.uk/products/dulux-damp-seal-primer-and-undercoat/