# Armstead Trade Undercoat

Primer, undercoat and sealer · Armstead Trade

Armstead Trade Undercoat covers up to 15 m² a litre and takes 1 coat, by Armstead Trade's own figures.
Source: Armstead Trade, Armstead Trade Undercoat product page, read 12 October 2026.

What it is for, in the maker's words: “Armstead Trade Undercoat is a professional quality, solvent-based undercoat suitable for use on all types of interior and exterior wood, metal and suitably primed masonry surfaces” (Armstead Trade Undercoat data sheet, read 12 October 2026).

## Coverage

Armstead Trade states up to 15 m² a litre. The maker's words: “Up to 15m2/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

Armstead Trade gives 1 coat for Armstead Trade Undercoat, in these words: “The normal recommendation is to apply one coat of Armstead Trade Undercoat”.

## Tin sizes

| Tin | One coat |
|---|---|
| 1 L | up to 15 m² |
| 2.5 L | up to 37.5 m² |
| 5 L | up to 75 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/armstead-trade-undercoat/#where-to-buy. BuildBatch sells nothing and compares no prices.

## Questions

**How much does a litre of Armstead Trade Undercoat cover?** Armstead Trade states up to 15 m² a litre for Armstead Trade Undercoat (Armstead Trade Undercoat product page, read 12 October 2026). A maker's coverage is their best case, on a smooth sealed surface.

**How much does a 5 litre tin of Armstead Trade Undercoat cover?** At the maker's figure a 5 L tin covers up to 75 m² in one coat. That is the litres times the coverage per litre, with nothing added for waste.

**How many coats does Armstead Trade Undercoat need?** Armstead Trade gives 1 coat for Armstead Trade Undercoat, in these words: “The normal recommendation is to apply one coat of Armstead Trade Undercoat”.

**What is Armstead Trade Undercoat for?** Armstead Trade says: “Armstead Trade Undercoat is a professional quality, solvent-based undercoat suitable for use on all types of interior and exterior wood, metal and suitably primed masonry surfaces” (Armstead Trade Undercoat data sheet, read 12 October 2026).

**What tin sizes does Armstead Trade Undercoat come in?** The catalogue lists 1 L, 2.5 L and 5 L. A shop may not stock every size.

## Where the figures come from

- Armstead Trade, Armstead Trade Undercoat product page (https://www.duluxtradepaintexpert.co.uk/en/products/armstead-trade-undercoat): coverage and coats, read 12 October 2026.
- Armstead Trade, Armstead Trade Undercoat data sheet (https://msp.images.akzonobel.com/prd/dh/eukddc/documents/4f/19/23/80/armstead_206_undercoat.pdf): what it is for, read 12 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/armstead-trade-undercoat/