# Dulux Stain Block Primer & Undercoat

Primer, undercoat and sealer · Dulux

Dulux Stain Block Primer & Undercoat covers up to 9 m² a litre and takes 1 coat, by Dulux's own figures.
Source: Dulux, Dulux Stain Block Primer & Undercoat product page, read 11 October 2026.

What it is for, in the maker's words: “Dulux Stain Block covers all kinds of common household stains and prevents the appearance of the stain on the surface” (Dulux Stain Block Primer & Undercoat product page, read 11 October 2026).

## Coverage

Dulux states up to 9 m² a litre. The maker's words: “Up to 9m2/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

Dulux gives 1 coat for Dulux Stain Block Primer & Undercoat, in these words: “Two coats will be necessary for difficult stains”.

## Tin sizes

| Tin | One coat |
|---|---|
| 750 ml | up to 6.75 m² |
| 2.5 L | up to 22.5 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-stain-block-primer-and-undercoat/#where-to-buy. BuildBatch sells nothing and compares no prices.

## Questions

**How much does a litre of Dulux Stain Block Primer & Undercoat cover?** Dulux states up to 9 m² a litre for Dulux Stain Block Primer & Undercoat (Dulux Stain Block 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 Stain Block Primer & Undercoat cover?** At the maker's figure a 2.5 L tin covers up to 22.5 m² in one coat. That is the litres times the coverage per litre, with nothing added for waste.

**How many coats does Dulux Stain Block Primer & Undercoat need?** Dulux gives 1 coat for Dulux Stain Block Primer & Undercoat, in these words: “Two coats will be necessary for difficult stains”.

**What is Dulux Stain Block Primer & Undercoat for?** Dulux says: “Dulux Stain Block covers all kinds of common household stains and prevents the appearance of the stain on the surface” (Dulux Stain Block Primer & Undercoat product page, read 11 October 2026).

**What tin sizes does Dulux Stain Block 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 Stain Block Primer & Undercoat product page (https://www.dulux.co.uk/en/products/dulux-stain-block-primer-and-undercoat): coverage, coats 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-stain-block-primer-and-undercoat/