# Johnstone's Trade Aqua Guard Durable Matt Finish

Woodwork paint · Johnstone's Trade

Johnstone's Trade Aqua Guard Durable Matt Finish covers up to 14 m² a litre, by Johnstone's Trade's own figures.
Source: Johnstone's Trade, Johnstone's Trade Aqua Guard Durable Matt Finish data sheet, read 11 October 2026.

Johnstone's Trade gives no single number of coats for it: “When attempting a wide colour change additional coats may be required”.

What it is for, in the maker's words: “Johnstone’s Trade Aqua Guard Matt is our most durable water-based matt paint for interior wood and metal” (Johnstone's Trade Aqua Guard Durable Matt Finish product page, read 11 October 2026).

The woodwork of a 3 × 4 m room (one face of a door and its architrave, a window's frame and board, and the skirting: 3.73 m²) needs 0.293 L in one coat (1 × 1 L) or 0.586 L in two (1 × 1 L).

## Coverage

Johnstone's Trade states up to 14 m² a litre. The maker's words: “Johnstone’s Trade Aqua Guard Matt will cover up to 14m2/l depending on the nature and porosity of the surface being painted”.
- Bare, rough or absorbent surfaces: A maker's coverage is their best case, on a smooth sealed surface: bare, rough or absorbent wood takes more. Johnstone's Trade's own words: “Johnstone’s Trade Aqua Guard Matt will cover up to 14m2/l depending on the nature and porosity of the surface being painted”.
- 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 brush and for touching up: BuildBatch's generic example, not the maker's. The tin-by-tin figures add nothing.
- Doors, windows and skirting of another size: The table counts one door, one window and skirting 119 mm high with an architrave 69 mm wide, the planner's typical sizes. Panelled doors, deep skirting, more doors or a radiator take more: the planner counts your own.

## Coats

Johnstone's Trade gives no single number of coats for Johnstone's Trade Aqua Guard Durable Matt Finish. Its words: “When attempting a wide colour change additional coats may be required”. Follow the tin's own instructions.

## Tin sizes

| Tin | One coat | Two coats |
|---|---|---|
| 1 L | up to 14 m² | up to 7 m² |
| 2.5 L | up to 35 m² | up to 17.5 m² |
| 5 L | up to 70 m² | up to 35 m² |

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

## How much for the woodwork of a room

| Room | In feet | Woodwork to paint | One coat | Two coats |
|---|---|---|---|---|
| 2.5 × 3 m | 8.2 × 9.8 ft | 3.37 m² | 1 × 1 L (0.265 L) | 1 × 1 L (0.53 L) |
| 3 × 3 m | 9.8 × 9.8 ft | 3.49 m² | 1 × 1 L (0.274 L) | 1 × 1 L (0.548 L) |
| 3 × 4 m | 9.8 × 13.1 ft | 3.73 m² | 1 × 1 L (0.293 L) | 1 × 1 L (0.586 L) |
| 4 × 4 m | 13.1 × 13.1 ft | 3.97 m² | 1 × 1 L (0.312 L) | 1 × 1 L (0.623 L) |
| 4 × 5 m | 13.1 × 16.4 ft | 4.2 m² | 1 × 1 L (0.33 L) | 1 × 1 L (0.661 L) |

Each room has one internal door and one window of 1.2 × 1.1 m: one face of the door, its architrave 69 mm wide, a strip round the window and skirting 119 mm high; 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=none&ceiling=none&woodwork=paint&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&woodpaint=custom&woodpaint.coats=2&woodpaint.coverage=14&woodpaint.extra=10&woodpaint.tins=1,2.5,5&woodpaint.examples=coats,extra&end=22

## 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/johnstones-trade-aqua-guard-durable-matt-finish/#where-to-buy. BuildBatch sells nothing and compares no prices.

## Questions

**How much does a litre of Johnstone's Trade Aqua Guard Durable Matt Finish cover?** Johnstone's Trade states up to 14 m² a litre for Johnstone's Trade Aqua Guard Durable Matt Finish (Johnstone's Trade Aqua Guard Durable Matt Finish data sheet, read 11 October 2026). A maker's coverage is their best case, on a smooth sealed surface.

**How much does a 5 litre tin of Johnstone's Trade Aqua Guard Durable Matt Finish cover?** At the maker's figure a 5 L tin covers up to 70 m² in one coat, or up to 35 m² in two coats. That is the litres times the coverage per litre, with nothing added for waste.

**How many coats does Johnstone's Trade Aqua Guard Durable Matt Finish need?** Johnstone's Trade gives no single number of coats for Johnstone's Trade Aqua Guard Durable Matt Finish. Its words: “When attempting a wide colour change additional coats may be required”. Follow the tin's own instructions.

**How much Johnstone's Trade Aqua Guard Durable Matt Finish for the woodwork of a 3 × 4 m room?** The woodwork of a 3 × 4 m room (one face of a door and its architrave, a window's frame and board, and the skirting: 3.73 m²) needs 0.293 L in one coat (1 × 1 L) or 0.586 L in two (1 × 1 L). The skirting is 119 mm high and the architrave 69 mm wide, the planner's typical sizes, with 10% extra for waste.

**What is Johnstone's Trade Aqua Guard Durable Matt Finish for?** Johnstone's Trade says: “Johnstone’s Trade Aqua Guard Matt is our most durable water-based matt paint for interior wood and metal” (Johnstone's Trade Aqua Guard Durable Matt Finish product page, read 11 October 2026).

**What tin sizes does Johnstone's Trade Aqua Guard Durable Matt Finish 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

- Johnstone's Trade, Johnstone's Trade Aqua Guard Durable Matt Finish data sheet (https://dam-cdn.ppg.com/adaptivemedia/rendition?id=d66d3145a5751c72db47a18f7b8a1b99d7481d4c): coverage and its words on coats, read 11 October 2026.
- Johnstone's Trade, Johnstone's Trade Aqua Guard Durable Matt Finish product page (https://www.johnstonestrade.com/en-GB/product/aqua-guard-durable-matt-finish/17000DUT088): 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/johnstones-trade-aqua-guard-durable-matt-finish/