# ARDEX X 325 PTB

Tile adhesive · ARDEX

A 20 kg bag of ARDEX X 325 PTB covers 4.8 m², by ARDEX UK's own figure: “equivalent to 4.8m2 at 3mm bed thickness”. ARDEX UK's other figures are in the table below.
Source: ARDEX UK, ARDEX X 325 PTB / X 325 PTB W product data sheet, read 12 October 2026.

What it is for, in the maker's words: “ARDEX X 325 PTB and ARDEX X 325 PTB W are mixed to a pourable consistency, making them ideal for fixing large format floor tiles” (ARDEX X 325 PTB / X 325 PTB W product data sheet, read 12 October 2026).

## The maker's figures

| Figure | The maker's words |
|---|---|
| 4.8 m² per 20 kg bag | “equivalent to 4.8m2 at 3mm bed thickness” |
| about 1.4 kg a square metre for each mm of bed | “Material requirement is approximately 1.4kg powder per m2 per mm bed thickness” |
- The conditions the maker names: Each figure is for the notch, bed, tile or joint the maker names beside it. An uneven surface, a larger notch or buttering the backs of the tiles takes more.
- Waste: None of these figures adds anything for what is left in the bucket or spilt.

## Sizes

20 kg bag

## 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/ardex-x-325-ptb/#where-to-buy. BuildBatch sells nothing and compares no prices.

## Questions

**How much does a 20 kg bag of ARDEX X 325 PTB cover?** ARDEX UK states 4.8 m² (“equivalent to 4.8m2 at 3mm bed thickness”), in its ARDEX X 325 PTB / X 325 PTB W product data sheet, read 12 October 2026. Nothing is added for waste.

**What is ARDEX X 325 PTB for?** ARDEX UK says: “ARDEX X 325 PTB and ARDEX X 325 PTB W are mixed to a pourable consistency, making them ideal for fixing large format floor tiles” (ARDEX X 325 PTB / X 325 PTB W product data sheet, read 12 October 2026).

**What sizes does ARDEX X 325 PTB come in?** The catalogue lists 20 kg bag. A shop may not stock every size.

## Where the figures come from

- ARDEX UK, ARDEX X 325 PTB / X 325 PTB W product data sheet (https://ardex.co.uk/wp-content/uploads/2019/09/ARDEX-X-325-PTB-Technical-Datasheet.pdf): coverage and what it is for, read 12 October 2026.

Written with AI tools; not yet checked by a tradesperson. Follow the bag's own instructions.

The page: https://buildbatch.co.uk/products/ardex-x-325-ptb/