Fibre X Fibreglass Additive 1kg for Screeds, Renders & Cementitious Mixes
Alkali-resistant glass fibre for screeds, renders and mortars. 1 kg treats a tonne of dry mix.
FORSPEC FIBRE X is an alkali-resistant fibreglass reinforcement fibre for cementitious screeds, mortars, renders and concrete toppings. Dry blend it in at batching and it spreads a three-dimensional net of filaments through the full depth of the mix, catching plastic shrinkage cracks as they start. AR glass survives the alkaline cement matrix long term, and it cannot rust.
Where to use it
- FORSPEC SCREEDX and FORCEM SCREED BINDER screeds, as the specified fibre
- Bonded, unbonded and floating screeds, sand and cement screeds and toppings
- Screeds over underfloor heating, pre-waterproofing screeds and screeds over FORSPEC membranes
- Roofing and falls screeds, screed repair and patching mixes
Why waterproofers buy it
- Alkali resistant, built to last in the high-pH cement matrix
- Controls plastic shrinkage cracking while the mix is still green
- Reinforces the full depth of the section, not one plane like mesh
- Non-corrosive, no staining or spalling at shallow cover or in wet screeds
- Improves toughness, impact resistance and flexural performance
- 1 kg pack, 36 month shelf life
Coverage
Dosage is by weight of dry mix. Standard: 1 kg per tonne, so 20 g per 20 kg bag, about 2 kg per m³ of screed. Enhanced: 1.5 to 2.0 kg per tonne, or 30 to 40 g per 20 kg SCREEDX bag.
Not for
Replacing structural steel where an engineer specifies it, replacing movement joints, reducing screed thickness on its own, or adding to a wet mix. Do not exceed the enhanced dose.
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Fibre X Fibreglass Additive 1kg for Screeds, Renders & Cementitious Mixes
The Waterproofing Shop
22/872 Canterbury Road
Roselands NSW 2196
Australia
Product Details
How to Use
Technical Specifications
Product Files
Technical Specifications
| Product Type | Alkali-resistant fibreglass reinforcement fibre |
| Fibre Type | Alkali-resistant fibreglass |
| Colour | White |
| Density | Approx. 2.6 g/cm3* |
| Alkali Resistance | High* |
| Chemical Resistance | Excellent* |
| Corrosion Resistance | Non-corrosive |
| Water Absorption | Negligible* |
| Standard Dosage | 1 kg per tonne of dry mix |
| Enhanced Dosage | 1.5 to 2.0 kg per tonne of dry mix |
| Dosage per 20kg FORSPEC SCREEDX Bag | 20 g standard, 30 to 40 g enhanced crack control |
| Dosage per Cubic Metre | Approx. 2 kg standard, approx. 3 to 4 kg enhanced, at a compacted density of approx. 2 tonne/m3 |
| Packaging | 1 kg |
| Application Temperature | 5C to 35C |
| Shelf Life | 36 months in dry, sealed packaging |
| Storage Conditions | Dry, sealed packaging |
| VOC Content | Not applicable, dry inorganic fibre containing no volatile organic compounds |
| Effect on Host Mix Timing | None, drying, curing and traffic times are governed by the host mix |
| * Typical Forspec R&D characteristic values | |
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Frequently asked questions
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Which surfaces is it safe on?
CompatibilityMost glazed ceramic, porcelain, glass mosaic and tough natural stone. Always spot-test on porous stones, marble, or polished surfaces before full use.
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Will it remove cured epoxy grout?
PerformanceMost effective on epoxy grout residue removed within 48 hours of grouting. Heavily cured residue may require mechanical assistance or specialist removers.
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Compatible with which sealers?
InstallationAll Dry-Treat / STAIN-PROOF penetrating sealers (Premium, 40SK, Dense Stone, Waterborne, Color Enhancing, Paver Enhancing) plus other solvent- or water-based penetrating sealers from any manufacturer.