# Mapei Keraflex Maxi S1

Tile adhesive · Mapei

Mapei Keraflex Maxi S1 takes 1.2 kg a square metre for each mm of bed, by Mapei UK's own figure: “CONSUMPTION ▪ 1.2 kg/m² per mm of thickness”.
Source: Mapei UK, Mapei Keraflex Maxi S1 technical data sheet (UK), read 12 October 2026.

What it is for, in the maker's words: “High-performance, deformable cementitious grey or ultra white adhesive, with extended open time and no vertical slip, with Low Dust technology, very low emission of volatile organic compounds and with fully offset Greenhouse Gas emissions” (Mapei Keraflex Maxi S1 technical data sheet (UK), read 12 October 2026).

## The maker's figures

| Figure | The maker's words |
|---|---|
| 1.2 kg a square metre for each mm of bed | “CONSUMPTION ▪ 1.2 kg/m² per mm of 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/mapei-keraflex-maxi-s1/#where-to-buy. BuildBatch sells nothing and compares no prices.

## Questions

**How much does a 20 kg bag of Mapei Keraflex Maxi S1 cover?** Mapei UK gives 1.2 kg a square metre for each mm of bed (“CONSUMPTION ▪ 1.2 kg/m² per mm of thickness”), so what a bag covers depends on how thick a bed you lay: divide the bag's 20 kg by 1.2 times the bed in millimetres.

**What is Mapei Keraflex Maxi S1 for?** Mapei UK says: “High-performance, deformable cementitious grey or ultra white adhesive, with extended open time and no vertical slip, with Low Dust technology, very low emission of volatile organic compounds and with fully offset Greenhouse Gas emissions” (Mapei Keraflex Maxi S1 technical data sheet (UK), read 12 October 2026).

**What sizes does Mapei Keraflex Maxi S1 come in?** The catalogue lists 20 kg bag. A shop may not stock every size.

## Where the figures come from

- Mapei UK, Mapei Keraflex Maxi S1 technical data sheet (UK) (https://cdnmedia.mapei.com/docs/librariesprovider12/products-documents/1_00056_keraflex-maxi-s1-zero_en-gb_7add61b7d33b4ff3841eed1f74b1e435.pdf?sfvrsn=465b6188_0): 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/mapei-keraflex-maxi-s1/