Fibre-Reinforced Plaster Mortar

Licacem Fibro

High performance fibre-reinforced plaster mortar — GP class to UNI EN 998-1, semi-structural, 10–25 mm single coat

Licacem Fibro is a high performance, fibre-reinforced plaster mortar — GP class to UNI EN 998-1. Its fibre-reinforced, controlled-shrinkage formulation delivers superior crack resistance, high mechanical strength and exceptional adhesion across all common building substrates. Suitable for semi-structural and stabilising plastering on brick, blockwork and concrete, indoors and outdoors. Available in grey and white.

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Standard UNI EN 998-1 — Class GP Fire Resistance A1 — EN 13501-1 Compressive Strength CS III Flexural Strength ≥1.8 N/mm² Capillary Absorption W0 CE Marked

StandardUNI EN 998-1 GP

Thickness per coat10–25 mm

Consumption13.5 kg/m² per 10 mm

Workability at 20°C80 minutes

Packaging25 kg bag

Features & Benefits

Why specify Licacem Fibro?

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Fibre-Reinforced Formulation

Licacem Fibro's fibre-reinforced formulation delivers superior crack and fissure resistance compared to standard plastering mortars — making it the preferred choice where substrate movement, semi-structural reinforcement or high mechanical durability is required.

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High Mechanical Strength — Semi-Structural

With flexural strength of ≥1.8 N/mm² and adhesive strength of ≥0.6 N/mm², Licacem Fibro is suitable for semi-structural and stabilising plastering applications — significantly stronger than standard GP mortars.

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10–25 mm in a Single Coat

Applies in thicknesses from 10 to 25 mm in a single coat — by hand or machine. For thicknesses above 25 mm, additional coats can be applied with at least 24 hours between each coat.

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A1 Fire Resistance

Achieves A1 fire resistance classification to EN 13501-1 — fully compatible with non-combustible EWI systems including all Licata mineral wool systems and A1 fibre cement board substrates.

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Controlled Shrinkage

The controlled-shrinkage formulation minimises hairline cracking and fissures throughout the product's life cycle — from application through the plastic phase to full cure.

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Ideal Base for Decorative Finishes

Smoothed with products from the Licata Finish range, Licacem Fibro is an ideal substrate for low-thickness decorative plasters — silicate, acrylic and siloxane coatings — and Licata paint systems.

Declared Performance

Performance to UNI EN 998-1

Licacem Fibro is classified as a GP (General Purpose) plastering mortar to UNI EN 998-1. Its fibre reinforcement delivers significantly higher flexural and adhesive strength than standard mortars — making it the specified choice for demanding and semi-structural applications.

Compressive strength

UNI EN 1015-11

CS III

Flexural strength

UNI EN 1015-11

≥1.8 N/mm²

Adhesive strength

UNI EN 1015-12

≥0.6 N/mm² -B

Capillary absorption

UNI EN 1015-18

Water vapour permeability

UNI EN 1015-19

≤ 20

Thermal conductivity

UNI EN 1745:2002

0.40 W/m·K

Fire resistance

EN 13501-1

Compatible Substrates

Where to use Licacem Fibro

Brickwork

Masonry blockwork

Concrete blocks

Cast-in-place reinforced concrete

Pebbledash levelling coat

Existing render — levelling and build-up

On concrete and smooth surfaces, pre-treat with LicaSpriz or Aggrappante LG bonding primer and apply Licacem Fibro within 12 hours. For different substrates, contact the Licata technical team.

Used In These Systems

Existing Pebbledash Render System — levelling coat option for substrates in poorer condition

Technical Data

Licacem Fibro — technical specification

AppearanceGrey powder

Particle size<1.5 mm

Mixing water16–20% by weight

Powder consumption13.5 kg/m² per 10 mm

Workability at 20°C80 minutes

Application thickness per coat10–25 mm

Application temperature+5°C to +35°C

Full strength28 days after curing

Density1470–1570 kg/m³

pH of mixtureapprox. 11

Packaging25 kg bag

Shelf life12 months in dry unopened container

StandardUNI EN 998-1 — Class GP

Fire resistanceA1 — EN 13501-1

Substrate Preparation

Preparing the substrate

Mechanically remove all flaking or easily detached material. Clean the surface thoroughly — free from dust, detergents, oily substances, wax, chalk and salt residue.

Concrete and smooth surfaces: pre-treat with LicaSpriz or Aggrappante LG bonding primer. Apply Licacem Fibro within 12 hours of priming.

Fill joints between bricks properly. Repair any holes or large cracks in masonry with Licata repair mortars. Reinforce joints between different elements with alkali-resistant fibreglass mesh.

Mix: pour the powder into a clean container with ¾ of the mixing water. Mix for 3–4 minutes with a low-speed mixer, adding remaining water gradually until smooth and lump-free. Rest 1–2 minutes, then stir again before use.

Application

Applying Licacem Fibro

Wet the substrate until saturated and in SSD conditions (Saturated Surface Dry) before applying. Do not apply to a surface with a film of standing water.

Apply 10–25 mm in a single coat — spray or apply by hand from bottom to top, straighten with an H-shaped striker or knife, and finish smooth. For thicknesses above 25 mm, allow at least 1 day before the next coat.

Scratch the surface 1.5–4 hours after application using a hard grout trowel — essential before any subsequent coat or finish. For coats above 25 mm, wait at least 24 hours before applying the next layer.

Reinforce joints between different elements with alkali-resistant fibreglass mesh embedded into the surface of the plaster to prevent cracking.

Do not apply on frozen substrates or in the presence of fog or excessive humidity. Ambient, substrate and product temperature must be between +5°C and +35°C throughout. Protect fresh mortar from rain, wind, adverse weather and direct sunlight for the first 48–72 hours.

Order Licacem Fibro

Available from all six Licata branches across the UK in 25 kg bags in grey and white. Contact our team for pricing, technical support and delivery.

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