Kerakoll H40 Gel-White Highly Flexible Multipurpose Tile Adhesive – 20 kg

Kerakoll H40 Gel-White is a revolutionary, eco-friendly multipurpose gel adhesive engineered with advanced structural rheology. Rated Class C2 for its industrial-grade performance, this shock-absorbing white adhesive offers high deformability and an exceptionally long open time.

Designed specifically for modern architectural challenges, its unique variable consistency can be mixed to function either as a non-slump thixotropic paste for flawless wall installations or as a highly fluid mortar to ensure 100% full wettability underneath heavy, large-format vitrified tiles and delicate natural stones.

Key Features & Benefits

• Variable Consistency Gel-Tech: Easily adapts to your installation requirements. Mix it thick for zero-slip wall performance, or fluid for effortless, void-free full bedding on floors.

• Extended Open Time & Pot Life: Provides an open window of $\ge$ 60 minutes and a 4-hour pot life, giving installers ample time to precisely align large panels and intricate mosaics.

• Zero Slump & Non-Slip: Easily supports the weight of heavy, massive tiles on walls without sinking, slipping, or sliding out of alignment.

• Premium Structural Flex: Formulated to withstand substrate vibrations, structural movements, thermal expansion, and intense environmental stresses.

• Stain-Safe White Formula: The bright white base prevents shadows or dark bleed-through when installing translucent glass mosaics, light marbles, and light-colored vitrified tile profiles.

Specifications

• Brand: Kerakoll

• Product: H40 Gel-White

• Packaging Size: 20 kg Bag

• Adhesive Class: Class C2 Standard Set

• Adhesive Bed Thickness: From 2 mm up to 15 mm

• Water Mixing Ratio: $\approx$ 5.0 to 6.2 Litres per 20 kg bag (depending on desired fluid or thixotropic consistency)

• Coverage: $\approx$ 1.2 kg/$m^2$ per mm of bed thickness (yields roughly 50–55 sq. ft. per bag at a 3 mm bed)

• Ideal Substrates: Cement screeds, concrete slabs, existing tiles (tile-on-tile), plasterboard, waterproofing layers, and radiant underfloor heating systems.

How to Use for Best Results

1. Surface Prep: Ensure the substrate is fully cured, clean, compact, rigid, and clear of dust, curing agents, grease, or rising dampness. Highly porous concrete surfaces should be slightly dampened or primed first.

2. Mixing: Pour clean, potable water into a mixing container and add the H40 Gel powder. Mix thoroughly with a low-speed mechanical mixer until a smooth, lump-free gel paste forms. Allow the mix to slake (rest) for 5 minutes, then stir briefly before use.

3. Application: Apply a thin layer of adhesive to the substrate with the flat side of a trowel to key it into the surface, then comb it out with an appropriately sized notched trowel.

4. Tile Placing: For tiles with sides larger than 60 cm, or for heavy traffic applications, use the double-spreading (back-buttering) technique to ensure full coverage. Press tiles firmly into the wet adhesive bed using a rubber mallet to expel any trapped air.