Fibrecast Polypropylene Fibres offer a reliable, cost-effective and long-lasting alternative to traditional animal hair in lime mortars. Designed to enhance the performance and durability of lime-based mortars, these synthetic fibres replicate the mechanical benefits of hair while offering greater consistency and longevity.
Ideal for heritage work, conservation projects, and modern applications where shrinkage control, crack resistance, and impact durability are crucial, Fibrecast Fibres can be easily incorporated into premixed lime mortars without the degradation issues associated with natural hair.
Key Benefits
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Crack Control – Reduces the risk of shrinkage cracks and freeze/thaw damage
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Improved Flexibility – Enhances impact resistance in renders and bedding mortars
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Fire Resistance – Polypropylene offers improved thermal stability over natural fibres
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Load Distribution – Helps spread point loads in bedding applications, e.g., slate or tile bedding
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Ease of Use – Easy to mix, no pre-treatment required, compatible with premixed mortars
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Non-Biodegradable – Unlike hair, synthetic fibres will not degrade over time
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Cost-Effective – More affordable and readily available than animal hair
Typical Applications
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Rendering onto lath (timber or reed)
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Bedding natural stone or slate
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Reinforcement of scratch and float coats in lime plasters and renders
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Lime mortars requiring enhanced freeze-thaw durability
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Adding to Limecrete slab to increase flexural strength
