Following its launch in 2022, Kerakoll is expanding the H40 range of multi-purpose gel-adhesives with the introduction of H40 Ultimate.
All four products in the range can reportedly be used with any type of tile and all conceivable substrates. H40 Gel is a standard-setting powder form gel-adhesive, while H40 Advanced is a rapid-setting powder form gel-adhesive which offers longer working times and accelerated adhesion.
The most recent addition, H40 Ultimate is a rapid-setting powder form gel-adhesive with genuine S2 deformability. It’s said to be the first of its kind – combining workability with a high degree of flexibility and deformation, the company says, “ensuring the utmost reliability even on difficult to tile substrates such as wood and metal”.
H40 Ultimate is available in Grey and Shock White, as with previous adhesives in the range. Shock White’s extreme whiteness reportedly comes from a special combination of cements and natural pure white materials which also contribute to the flow properties of the products while increasing coverage and workability. It makes the adhesives suitable for working with light coloured grouts and all types of natural stone and marble.
All three adhesives are easy to spread and hold their shape, Kerakoll says, supporting the weight of large tiles and stopping vertical slip on walls, making work on site simple. The rapid setting adhesives are reportedly non-hazardous to the environment and human health, as the formulation does not include Portland cement and is non-irritating to the skin.
The way the mix flows is designed to fully wet the back of the tile, filling voids and ensuring a full structural bond, while the fact that it does not dry out means that it does not thicken or allow a film to form.
H40 Extreme, a hybrid gel-adhesive, completes the range. This product is said to combine extreme fluidity – Kerakoll says it’s five times less viscous than a traditional polyurethane adhesive – with extreme flexibility, as it is ten times more deformable than generic S2 adhesives. It’s designed to cope with the most extreme on-site conditions. making it a suitable choice for sites with uncommon and/or difficult substrates.
Kerakoll’s R&D team has developed its own stringent tests aimed to ensure H40 gel-adhesives will withstand the stresses suffered by a tiling installation in the real world and not just in laboratory conditions. Samples of a floor bonded with adhesive are subjected to 20 mechanical stress cycles, 50 thermal stress cycles and 50 freeze-thaw cycles, before undergoing tensile and shear strength tests to measure the strength of the bond. All four H40 gel-adhesives pass these tests “with flying colours” due to the strength of the adhesive bond.
“The range really is universal,” the company says, “suitable for use on all substrates and in all situations, be it in residential or heavy duty commercial settings, internally or externally. Externally it can even be used on areas subject to significant temperature changes and in constant exposure to water.”