# Larsen FiberFlex™ Standard Set+ (Pro Purple Bag)

Tile adhesive · Larsen

A 20 kg bag of Larsen FiberFlex™ Standard Set+ (Pro Purple Bag) covers 4 to 5 m², by Larsen Building Products' own figure: “Coverage: 4-5m2/20kg bag @ 3mm bed”. Larsen Building Products' other figures are in the table below.
Source: Larsen Building Products, Larsen FiberFlex™ Standard Set+ (Pro Purple Bag) product page, read 12 October 2026.

What it is for, in the maker's words: “Larsen FIBERFLEX™ Professional Standard Set+ is a specially formulated, fully flexible, S1 rated, non-slip, standard setting, cement based adhesive with extended open time. It is suitable for beds of 3 – 20mm, interior, exterior, floor and wall applications” (Larsen FiberFlex™ Standard Set+ (Pro Purple Bag) technical data sheet, read 12 October 2026).

## The maker's figures

| Figure | The maker's words |
|---|---|
| 4 to 5 m² per 20 kg bag | “Coverage: 4-5m2/20kg bag @ 3mm bed” |
| about 4 kg a square metre | “COVERAGE Approx 4 kg/m2 @ 3 mm bed” |
- 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.
- A range, not one figure: Larsen Building Products gives a range. To buy enough, plan on the end that needs more: the smaller area a bag, or the higher kilograms a square metre.
- Waste: None of these figures adds anything for what is left in the bucket or spilt.

## What one bag covers at the maker's rate

| Rate | A 20 kg bag |
|---|---|
| about 4 kg/m² (“COVERAGE Approx 4 kg/m2 @ 3 mm bed”) | about 5 m² |

Arithmetic on the maker's figure: the bag's kilograms divided by a rate a square metre, or times an area a kilogram, with nothing added for waste.

## 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/larsen-fiberflex-standard-set-pro-purple-bag/#where-to-buy. BuildBatch sells nothing and compares no prices.

## Questions

**How much does a 20 kg bag of Larsen FiberFlex™ Standard Set+ (Pro Purple Bag) cover?** Larsen Building Products states 4 to 5 m² (“Coverage: 4-5m2/20kg bag @ 3mm bed”), in its Larsen FiberFlex™ Standard Set+ (Pro Purple Bag) product page, read 12 October 2026. Nothing is added for waste.

**How much Larsen FiberFlex™ Standard Set+ (Pro Purple Bag) per square metre?** Larsen Building Products states about 4 kg a square metre (“COVERAGE Approx 4 kg/m2 @ 3 mm bed”).

**What is Larsen FiberFlex™ Standard Set+ (Pro Purple Bag) for?** Larsen Building Products says: “Larsen FIBERFLEX™ Professional Standard Set+ is a specially formulated, fully flexible, S1 rated, non-slip, standard setting, cement based adhesive with extended open time. It is suitable for beds of 3 – 20mm, interior, exterior, floor and wall applications” (Larsen FiberFlex™ Standard Set+ (Pro Purple Bag) technical data sheet, read 12 October 2026).

**What sizes does Larsen FiberFlex™ Standard Set+ (Pro Purple Bag) come in?** The catalogue lists 20 kg bag. A shop may not stock every size.

## Where the figures come from

- Larsen Building Products, Larsen FiberFlex™ Standard Set+ (Pro Purple Bag) product page (https://larsenbuildingproducts.com/product/flexible-standard-set-pro-range/): coverage, read 12 October 2026.
- Larsen Building Products, Larsen FiberFlex™ Standard Set+ (Pro Purple Bag) technical data sheet (https://larsenbuildingproducts.com/?jet_download=1d290407529b6549266db28e4dc131a8e3d271a6): 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/larsen-fiberflex-standard-set-pro-purple-bag/