# Farrow & Ball Metal Primer & Undercoat

Primer, undercoat and sealer · Farrow & Ball

Farrow & Ball Metal Primer & Undercoat covers up to 12 m² a litre and takes 2 coats, by Farrow & Ball's own figures.
Source: Farrow & Ball, Farrow & Ball Metal Primer & Undercoat product advice sheet, read 12 October 2026.

What it is for, in the maker's words: “A rust inhibiting primer for all bare ferrous metal surfaces, our Metal Primer & Undercoat is designed to create a smooth foundation on gates, railings, furniture, radiators and metal downpipes before using Exterior Eggshell, Flat Eggshell, Full Gloss or Dead Flat®” (Farrow & Ball Metal Primer & Undercoat product advice sheet, read 12 October 2026).

## Coverage

Farrow & Ball states up to 12 m² a litre. The maker's words: “Coverage Rate (m2/l per coat): Up to 12”.
- 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

Farrow & Ball gives 2 coats for Farrow & Ball Metal Primer & Undercoat, in these words: “Recommended Number of Coats: 2*”.

## Tin sizes

| Tin | One coat | 2 coats |
|---|---|---|
| 750 ml | up to 9 m² | up to 4.5 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/farrow-and-ball-metal-primer-and-undercoat/#where-to-buy. BuildBatch sells nothing and compares no prices.

## Questions

**How much does a litre of Farrow & Ball Metal Primer & Undercoat cover?** Farrow & Ball states up to 12 m² a litre for Farrow & Ball Metal Primer & Undercoat (Farrow & Ball Metal Primer & Undercoat product advice sheet, read 12 October 2026). A maker's coverage is their best case, on a smooth sealed surface.

**How much does a 750 ml tin of Farrow & Ball Metal Primer & Undercoat cover?** At the maker's figure a 750 ml tin covers up to 9 m² in one coat, or up to 4.5 m² in 2 coats. That is the litres times the coverage per litre, with nothing added for waste.

**How many coats does Farrow & Ball Metal Primer & Undercoat need?** Farrow & Ball gives 2 coats for Farrow & Ball Metal Primer & Undercoat, in these words: “Recommended Number of Coats: 2*”.

**What is Farrow & Ball Metal Primer & Undercoat for?** Farrow & Ball says: “A rust inhibiting primer for all bare ferrous metal surfaces, our Metal Primer & Undercoat is designed to create a smooth foundation on gates, railings, furniture, radiators and metal downpipes before using Exterior Eggshell, Flat Eggshell, Full Gloss or Dead Flat®” (Farrow & Ball Metal Primer & Undercoat product advice sheet, read 12 October 2026).

**What tin sizes does Farrow & Ball Metal Primer & Undercoat come in?** The catalogue lists 750 ml. A shop may not stock every size.

## Where the figures come from

- Farrow & Ball, Farrow & Ball Metal Primer & Undercoat product advice sheet (https://www.farrow-ball.com/media/wysiwyg/Product-Advice-Sheets/Paint-primers/GBMTP.pdf): coverage, coats and 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/farrow-and-ball-metal-primer-and-undercoat/