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Milled Glass Fibers are precision-cut and milled microfibers produced from continuous glass filaments and engineered specifically to reinforce cementitious and polymer-modified construction systems. Unlike long chopped strands that mainly improve macro-crack bridging, milled fibers work at the micro scale—dispersing throughout the matrix to increase toughness, cohesion, and resistance to micro-crack initiation.
In construction formulations, milled glass fibers act as a micro-rebar network that enhances tensile and flexural performance, reduces plastic and drying shrinkage cracking, and improves impact/abrasion resistance—particularly in thin sections and high-wear surfaces such as industrial flooring, overlays, repair mortars, and grouts.
Milled Glass Fiber, Short Glass Fiber, Glass Microfibers, E-Glass Milled Fiber (typical)
Not applicable – inorganic glass fiber (silicate-based)
65997-17-3
266-046-0
7019.19.00
Not classified as dangerous goods / Non-hazardous for transport
White to off-white free-flowing fibrous powder
≥ 99% inorganic glass fiber
Amorphous glass (non-crystalline)
~2.5 – 2.6 g/cm³
~6 – 7
Up to ~800 °C (inorganic fiber stable; performance depends on binder/matrix system)
Structural and non-structural repair mortars
Crack repair and resurfacing systems
Polymer-modified repair formulations
Non-shrink cementitious grouts
Machinery and base-plate grouts
Anchoring and void-filling compounds
Cementitious and epoxy-cement floors
Thin and medium thickness overlays
High-wear industrial toppings
Waterproofing coatings
Protective cementitious coatings
Crack-resistant renders and skim layers
| Property | Typical Value |
|---|---|
| Material | Glass Fiber (E-glass / AR-glass) |
| Form | Milled microfibers |
| Appearance | White to off-white |
| Density | ~2.6 g/cc |
| Combustibility | Non-combustible |
| Alkali Resistance | Available (AR grade recommended for cement) |
Reinforces the matrix and increases resistance to tensile and bending stresses.
Dispersed microfibers control microcrack formation and propagation.
Improves energy absorption and reduces brittle failure and edge chipping.
Upgrades wear durability in floors, overlays, and high-traffic zones.
Supports crack resistance and shape retention in thin-section cement products.
Actual dosage depends on cement content, aggregate grading, polymer modification, and required performance. Laboratory trials are recommended to optimize final dosage.
Dosage: 0.3 – 1.0% by weight of total dry mix
Improves crack resistance, edge durability, and impact strength in structural and non-structural repairs.
Dosage: 0.2 – 0.6% by weight of total dry mix
Enhances toughness, reduces cracking tendency, and improves dimensional stability under load.
Dosage: 0.4 – 1.2% by weight of total dry mix
Improves abrasion resistance, wear durability, and resistance to micro-cracking in high-traffic areas.
Dosage: 0.2 – 0.5% by weight of binder (cement + polymer)
Improves film integrity, reduces hairline cracking, and enhances coating durability.
Dosage: 0.3 – 0.8% by weight of total dry mix
Provides micro-reinforcement while maintaining workable rheology and finish quality.
Milled glass fibers are generally safe for industrial handling; however, fine fibers/dust may cause mechanical irritation.
Safety goggles
Gloves
Dust mask / respirator (in dusty handling areas)
Refer to the Safety Data Sheet (SDS) for detailed handling guidance.
20 kg / 25 kg bags (HDPE lined / moisture barrier)