# Zinsser AllCoat Interior SB

Emulsion paint · Zinsser

Zinsser AllCoat Interior SB covers 9 m² a litre, by Zinsser's own figures.
Source: Zinsser, Zinsser AllCoat Interior SB product page, read 12 October 2026.

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

What it is for, in the maker's words: “A 4-in-1 primer, sealer, stain blocker, and finish, AllCoat (SB) provides a versatile solution for painting over fire damage” (Zinsser AllCoat Interior SB product page, read 12 October 2026).

The walls of a 3 × 4 m room, 2.4 m high, need 3.761 L in one coat (4 × 1 L) or 7.522 L in two (1 × 5 L + 3 × 1 L).

## Coverage

Zinsser states 9 m² a litre. The maker's words: “Coverage: 9m² per Litre”.
- Bare, rough or absorbent surfaces: A maker's coverage is their best case, on a smooth sealed surface: bare, rough or absorbent walls take more.
- A strong change of colour: Going from a dark colour to a light one, or the other way, can take another coat, and each extra coat is the paint of one coat again.
- Waste and touch-ups: The room table adds 10% for what stays in the tray and on the roller and for touching up: BuildBatch's generic example, not the maker's. The tin-by-tin figures add nothing.
- The ceiling and the woodwork: Neither is in these figures. Each is a separate paint and a separate line on a list.

## Coats

The document read for this page gives no number of coats for Zinsser AllCoat Interior SB. Follow the tin's own instructions.

## Tin sizes

| Tin | One coat | Two coats |
|---|---|---|
| 1 L | 9 m² | 4.5 m² |
| 2.5 L | 22.5 m² | 11.25 m² |
| 5 L | 45 m² | 22.5 m² |
| 10 L | 90 m² | 45 m² |

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

## How many tins for a room

| Room | In feet | Walls to paint | One coat | Two coats |
|---|---|---|---|---|
| 2.5 × 3 m | 8.2 × 9.8 ft | 23.57 m² | 3 × 1 L (2.881 L) | 1 × 5 L + 1 × 1 L (5.762 L) |
| 3 × 3 m | 9.8 × 9.8 ft | 25.97 m² | 1 × 2.5 L + 1 × 1 L (3.174 L) | 1 × 2.5 L + 4 × 1 L (6.348 L) |
| 3 × 4 m | 9.8 × 13.1 ft | 30.77 m² | 4 × 1 L (3.761 L) | 1 × 5 L + 3 × 1 L (7.522 L) |
| 4 × 4 m | 13.1 × 13.1 ft | 35.57 m² | 1 × 2.5 L + 2 × 1 L (4.348 L) | 1 × 5 L + 4 × 1 L (8.695 L) |
| 4 × 5 m | 13.1 × 16.4 ft | 40.37 m² | 1 × 5 L (4.934 L) | 1 × 10 L (9.868 L) |

Each room is 2.4 m high with one internal door and one window of 1.2 × 1.1 m taken off; 10% extra for waste, BuildBatch's generic example. Worked out by the planner when the site was built.

Start a list for a 3 × 4 m room with this paint's figures: https://buildbatch.co.uk/start/#v=1&job=paint&walls=paint&ceiling=none&trim=none&units=m&length=4&width=3&height=2.4&door=0.762x1.981&window=1.2x1.1&surface=sound&subfloor=unsure&ground=unsure&fitting=unsure&wallpaint=custom&wallpaint.coats=2&wallpaint.coverage=9&wallpaint.extra=10&wallpaint.tins=1,2.5,5,10&wallpaint.examples=coats,extra&end=21

## 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/zinsser-allcoat-interior-sb/#where-to-buy. BuildBatch sells nothing and compares no prices.

## Questions

**How much does a litre of Zinsser AllCoat Interior SB cover?** Zinsser states 9 m² a litre for Zinsser AllCoat Interior SB (Zinsser AllCoat Interior SB 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 Zinsser AllCoat Interior SB cover?** At the maker's figure a 5 L tin covers 45 m² in one coat, or 22.5 m² in two coats. That is the litres times the coverage per litre, with nothing added for waste.

**How many coats does Zinsser AllCoat Interior SB need?** The document read for this page gives no number of coats for Zinsser AllCoat Interior SB. Follow the tin's own instructions.

**How many tins of Zinsser AllCoat Interior SB for a 3 × 4 m room?** The walls of a 3 × 4 m room, 2.4 m high, need 3.761 L in one coat (4 × 1 L) or 7.522 L in two (1 × 5 L + 3 × 1 L). The room is 2.4 m high with one door and one window taken off, with 10% extra for waste.

**What is Zinsser AllCoat Interior SB for?** Zinsser says: “A 4-in-1 primer, sealer, stain blocker, and finish, AllCoat (SB) provides a versatile solution for painting over fire damage” (Zinsser AllCoat Interior SB product page, read 12 October 2026).

**What tin sizes does Zinsser AllCoat Interior SB come in?** The catalogue lists 1 L, 2.5 L, 5 L and 10 L. A shop may not stock every size.

## Where the figures come from

- Zinsser, Zinsser AllCoat Interior SB product page (https://zinsseruk.com/products/allcoat-solvent-based): coverage 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/zinsser-allcoat-interior-sb/