Concrete and screed fibres that aim to reduce plastic shrinkage and improve surface durability. Tradespeople and home improvers gain greater confidence in finishes and fewer call-backs. Are Build with Colour Polypropylene Fibres the right addition to your next pour?
⚡ At a Glance
- • Coverage: 900g bag treats approximately one cubic metre of mix
- • Best for: Floor screeders, concrete contractors and DIYers repairing slabs
- • Not ideal for: Replacing structural reinforcement such as rebar in load-bearing elements
A single 900g bag is intended to treat about one cubic metre and is supplied in a form that disperses readily at batching. Polypropylene fibres act as micro-reinforcement to limit early-age cracking and help produce a more durable surface.
Fewer surface cracks – thanks to 19mm polypropylene fibres
Fibres form a three-dimensional mesh within the paste, bridging micro-cracks that form during plastic shrinkage and slowing crack propagation. Dispersion throughout the mix ensures many small fibres work together rather than concentrating stress in one area.
Reduced visible shrinkage cracks leads to smoother finishes and less remedial work after the pour.
Improved wear resistance – with dispersed polypropylene reinforcement
Distributed synthetic fibres increase resistance to abrasion by sharing surface loads and reducing micro-fracture development under traffic and mechanical wear. The material improves the inflexional behaviour of concrete, helping the surface tolerate small movements.
Surfaces resist dusting and abrasion better, extending the service life of screeds and overlays.
Straightforward mixing and dosing – with 900g pre-measured bags
Each bag contains a ready quantity intended for one cubic metre, supplied in a form that separates after vacuum fluffing and disperses quickly during batching. Quick dispersion helps maintain uniform fibre distribution without additional handling steps.
Consistent dosing simplifies estimating and speeds up on-site blending, saving time on larger pours.
✨ The 4 Key Reasons for Build with Colour Polypropylene Fibres
- 900g coverage per bag — Treats one cubic metre of concrete with a single bag
- Fast dispersion in mixes — Achieves uniform fibre spread for consistent performance
- Vacuum fluffing compatible — Separates readily for easier incorporation at batching stage
- Economical dosage — Small quantities deliver measurable durability benefits over time
📋 Technical Details at a Glance
- Category: Home Improvement
- Brand: Build with Colour
- Material: Polypropylene (PP) fibres
- Fibre length: 19mm (as specified in product name)
- Bag weight: 900g
❓ Frequently Asked Questions
Q: How much does one bag treat?
A: 900g is enough for approximately one cubic metre of concrete or screed, according to the product notes.
Q: How are the fibres added to the mix?
A: Fibres disperse quickly in the mix and users report they separate easily after vacuum fluffing, so add at batching for even distribution.
Q: Will the fibres prevent cracking entirely?
A: Fibres reduce plastic shrinkage cracks and enhance surface durability, but they are described as micro-reinforcement rather than a replacement for structural reinforcement.
🏆 Our Verdict
The Build with Colour Polypropylene Fibres suit floor installers, concrete contractors and DIYers who want fewer surface cracks and tougher screeds. The combination of 19mm polypropylene fibres and a 900g per-bag dosing makes application straightforward while improving wear resistance. Long-term value comes from reduced remedial work and more durable finishes rather than a change to structural reinforcement.
