Alccofast (HF) – Tile Adhesive for Large Format Tiles and Stones
Highly Deformable Tile Adhesive for Large Format Tiles & Stones
Alccofast (HF) is a highly polymer-modified and highly deformable tile adhesive for large format tiles and stones, specially formulated for demanding tile and stone installation applications. It is designed to provide reliable bonding, flexibility and controlled deformation for compatible large-format tiles, natural stones and other specified tile types.
As part of the Alccofast tile adhesives range, Alccofast HF is developed for applications where conventional tile-fixing solutions may not provide the required level of deformability. Its S2 deformable classification makes it suitable for specified applications where greater flexibility between the tile and substrate is required.
Key Features
- Highly deformable tile adhesive: Designed for applications where higher deformability is required between the tile and substrate.
- Ideal for large-format tiles: Specially developed for suitable large-format tile installations where tile size and weight require careful adhesive selection.
- Suitable for stones: Provides an application-specific tile and stone adhesive solution for compatible natural stone and large-format stone installations.
- Highly polymer-modified: Its polymer-modified formulation is designed to provide enhanced adhesion and deformation characteristics.
- S2 deformability: Classified as S2, with deformability of ≥ 5.0 mm, making it suitable for specified demanding applications.
- Reliable bonding: Designed to provide strong adhesion to compatible tiles, stones and recommended substrates.
- Thin-bed application: Supports controlled adhesive-bed application when used according to recommended installation practices.
- Slip-resistant performance: Slip is specified at ≤ 0.5 mm.
- Interior and exterior suitability: Designed for specified interior and exterior wall and floor applications.
- Multiple substrate compatibility: Suitable for a range of compatible cement-based and board substrates as specified.
Technical Classification
IS 15477:2019
Technical Performance
Tensile Adhesion – Dry
≥ 1.50 N/mm²
Tensile Adhesion – Heat Ageing
≥ 1.00 N/mm²
Tensile Adhesion – Wet
≥ 1.00 N/mm²
Shear Adhesion – Dry
≥ 1.50 N/mm²
Shear Adhesion – Heat Ageing
≥ 1.00 N/mm²
Shear Adhesion – Wet
≥ 1.00 N/mm²
Open Time
≥ 25 minutes
Adjustment Time
≥ 25 minutes
Slip
≤ 0.5 mm
Deformability
≥ 5.0 mm
Recommended Bed Thicknes
3 mm
Approx. Coverage
2.5–3 sq. ft./kg
Coverage
Alccofast HF provides an approximate coverage of 2.5–3 sq. ft./kg at a 3 mm bed thickness.
Actual coverage can vary depending on:
- Tile or stone size
- Tile/stone back profile
- Substrate flatness
- Trowel size
- Adhesive-bed thickness
- Application technique
- Substrate condition
- Installation method
For large-format tile projects, actual site consumption should be evaluated before final material estimation.
Recommended Substrates
Alccofast HF can be used on suitable compatible substrates, including:
-
Cement plaster -
Properly prepared cement-plastered surfaces. -
Cement concrete -
Sound and suitably prepared concrete substrates. -
Cement screed -
Compatible cement screed surfaces. -
Gypsum board -
Suitable prepared gypsum board substrates. -
Plywood -
Compatible plywood surfaces where permitted by the application requirements. -
Calcium silicate board -
Suitable prepared calcium silicate boards. -
Medium-density fibre board -
Compatible MDF surfaces. -
Fibre cement board -
Suitable fibre cement board substrates. -
Cement board -
Compatible cement board applications. -
Bison panels -
Suitable prepared Bison panel surfaces.
The substrate must be stable, clean, sound and free from dust, oil, grease, loose particles and other contaminants before application.
How to Apply Alccofast HF
Prepare the Surface
The substrate should be firm, stable and properly prepared. Remove dust, dirt, oil, grease, loose particles, laitance and other contaminants. Any cracks, weak areas or significant surface irregularities should be appropriately treated before tile installation.
Prepare the Adhesive
Mix Alccofast HF with the recommended quantity of clean water according to the latest product technical instructions.
Mix Thoroughly
Mix until a homogeneous, lump-free consistency is achieved. Allow the mixture to stand for the recommended period, where applicable, and remix before application.
Apply the Adhesive
Spread Alccofast HF evenly over the prepared substrate using a suitable notched trowel. Maintain the recommended adhesive-bed thickness.
Fix the Large Format Tile or Stone
Place the tile or stone onto the adhesive within the specified open time. Press adequately to achieve proper contact and coverage. For large-format tiles and stones, appropriate installation techniques should be followed to achieve the required adhesive coverage.
Adjust the Tile
Position and adjust the tile within the specified adjustment time. Avoid disturbing the tile after the adhesive has exceeded its recommended adjustment period.
Allow Proper Setting
Allow the adhesive to set according to the product's recommended requirements before proceeding with grouting or subsequent installation work.
What Makes Alccofast HF Different?
- Higher Deformability - Alccofast HF is classified as S2, with deformability of ≥ 5.0 mm. This makes deformability one of its key characteristics for suitable demanding tile and stone applications.
- Designed for Large Format Tiles - Large-format tiles can require an adhesive with suitable deformation characteristics. Alccofast HF is specifically positioned as a tile adhesive for large format tiles.
- Suitable for Stones - The product provides a specialised tile and stone adhesive solution for compatible natural stone and large-format stone applications.
- Highly Polymer-Modified Formulation - Its highly polymer-modified formulation is designed to provide suitable adhesion and flexibility for demanding installation conditions.
- Thin-Bed Application - Alccofast HF supports thin-bed installation, allowing controlled application of the adhesive when the recommended method is followed.
- Suitable for Interior & Exterior Applications - The product can be considered for specified interior and exterior wall and floor applications where its technical characteristics match the project requirements.
Alccofast HF for Large Format Tile Installation
When selecting the best tile adhesive for large format tiles, the adhesive should not be selected based only on tile type. Tile dimensions, weight, substrate movement, application environment and required deformation should also be considered.
Alccofast HF is designed for suitable large-format applications where a highly deformable adhesive is required.
Proper installation also requires:
- A properly prepared substrate
- Adequate adhesive coverage
- Correct trowel selection
- Correct adhesive-bed thickness
- Appropriate tile placement
- Following the recommended open and adjustment times
Alccofast HF for Natural Stone Installation
Natural stones can vary considerably in size, weight, porosity and surface characteristics. Therefore, selecting suitable tile adhesives for stones is important for achieving reliable installation performance.
Alccofast HF can be considered for compatible natural stone applications where its highly deformable characteristics are appropriate for the project.
The stone, substrate and environmental conditions should always be evaluated before installation
Alccofast HF for Exterior Tiles
Exterior tile installations can experience temperature changes, moisture and substrate movement. Selecting an appropriate tile adhesive for exterior tiles is therefore important.
Alccofast HF can be considered for specified exterior applications where the tile, substrate and project conditions meet its technical requirements.
Before application:
- Ensure the substrate is sound and stable.
- Remove all loose and contaminated material.
- Confirm compatibility of the tile/stone and substrate.
- Follow the specified mixing ratio.
- Apply the adhesive at the recommended thickness.
- Achieve appropriate adhesive coverage.
- Follow the recommended setting and curing requirements.
Important: Always follow the latest Alccofast HF technical data sheet for project-specific mixing, application and curing requirements.
Suitable Tile & Stone Applications
Alccofast HF is specifically developed as a tile adhesive for large format tiles and stones and can be considered for suitable applications involving:
Large Format Tiles
Large-format tiles require proper substrate preparation, adhesive coverage and an adhesive with appropriate deformation characteristics. Alccofast HF is formulated for suitable large-format tile installations where higher deformability is required.
Natural Stones
Alccofast HF can be used for compatible natural stone applications where the stone characteristics, substrate and project conditions meet the product requirements.
Vitrified Tiles
The product can be considered for suitable vitrified tile applications where higher deformability is required and the tile and substrate are compatible with the product.
Porcelain Tiles
Alccofast HF is suitable for specified porcelain tile applications, including compatible large-format porcelain tiles.
Ceramic Tiles
Compatible ceramic tile applications can also be considered according to the product’s recommended application requirements.
Interior & Exterior Applications
Alccofast HF is suitable for specified:
For compatible large-format tiles and stones where higher deformability is required.
For suitable large-format flooring applications involving compatible tiles and stones.
For specified exterior wall applications where the tile, substrate, environmental conditions and installation requirements are compatible.
For suitable exterior flooring applications where a highly deformable adhesive is required.
For a tile adhesive for exterior tiles, product selection should consider environmental exposure, substrate movement, moisture, tile characteristics and expected temperature variations.
Frequently Asked Questions
What is Alccofast HF?
Alccofast HF is a highly polymer-modified and highly deformable tile adhesive for large format tiles and stones, designed for suitable demanding tile and stone installation applications.
What is Alccofast HF used for?
It is designed for suitable large-format tile, natural stone, vitrified, porcelain and compatible ceramic tile applications on recommended substrates.
Is Alccofast HF suitable for large-format tiles?
Yes. Alccofast HF is specifically positioned as a tile adhesive for large format tiles and stones and is designed for applications where higher deformability is required.
Is Alccofast HF suitable for natural stones?
Yes. It is designed for suitable natural stone applications where the stone, substrate and project conditions are compatible with the product.
What does S2 mean for Alccofast HF?
S2 is the deformable adhesive classification. Alccofast HF has a specified deformability of ≥5.0 mm, according to the supplied technical information.
Can Alccofast HF be used for exterior tiles?
Yes, it is suitable for specified exterior wall and floor applications, subject to compatibility between the tile/stone, substrate and project conditions.
What substrates can be used with Alccofast HF?
Suitable substrates include cement plaster, cement concrete, cement screed, gypsum board, plywood, calcium silicate board, MDF, fibre cement board, cement board and Bison panels, subject to application requirements.
What is the coverage of Alccofast HF?
The approximate coverage is 2.5–3 sq. ft./kg at a 3 mm bed thickness. Actual consumption depends on tile/stone size, substrate condition, adhesive thickness and application technique.
What is the classification of Alccofast HF?
Alccofast HF is classified as Type 3/4T, S2 under IS 15477:2019 and C2TE S2 under EN 12004-1:2017.
Choose Alccofast HF for Large Format Tiles & Stones
For demanding installations requiring a tile adhesive for large format tiles and stones, Alccofast HF provides a highly polymer-modified and highly deformable solution designed for suitable interior and exterior applications.
With its S2 deformability, reliable bonding, thin-bed application and suitability for large-format tiles and stones, Alccofast HF is designed to support modern tile installation requirements where higher deformation capability is important.
Looking for a highly deformable tile adhesive for large-format tiles or stones? Talk to Alccotech for product and application guidance.
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