{"product_id":"kerakoll-h40-tech","title":"Kerakoll H40 Tech ultra flexible gel tile adhesive","description":"\u003cp\u003eLaying large tiles? Cladding a facade? The substrate moves, heat expands. Rigid adhesive cracks, tiles detach. Then comes demolition and re-tiling. The flexible gel adhesive moves with the substrate and holds. GT-3 — the highest flexibility rating. This is Kerakoll H40 Tech.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMade in Italy.\u003c\/strong\u003e Kerakoll, Sassuolo — building material innovation since 1968. The H40 name has been a reliable reference in tiling for over 50 years.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge and thin tiles (up to 160x320 cm):\u003c\/strong\u003e the liquid gel fully wets the tile back — full bedding under the tile\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFacade and terrace:\u003c\/strong\u003e holds between 40 °C and +90 °C — thermal fluctuations do not crack the bond\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoving, deforming substrates:\u003c\/strong\u003e S2 deformability, GT-3 classification — safe on cracked substrates and underfloor heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTiles reinforced with fabric and resin backing on the reverse side:\u003c\/strong\u003e the gel fully envelops the back structure — structural bonding even on problematic tiles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge tile alignment is time-sensitive:\u003c\/strong\u003e long open time (≥60 minutes) and 20 minutes adjustment time — no rushing, precise tile positioning possible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFor walls and floors, from one bag:\u003c\/strong\u003e thixotropic mix for walls, liquid for floors — does not slip, easy to spread with a trowel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct family\u003c\/th\u003e\n\u003ctd\u003eH40 tile adhesive line (Gel + Advanced + Tech + Extreme)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eStructural gel tile adhesive (one-component, cement-based)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eClass\u003c\/th\u003e\n\u003ctd\u003eC2 TE S2 (EN 12004), GT-3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial consumption\u003c\/th\u003e\n\u003ctd\u003e≈ 1.25 kg\/m²\/mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLayer thickness\u003c\/th\u003e\n\u003ctd\u003e2–15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOpen time\u003c\/th\u003e\n\u003ctd\u003e≥ 60 minutes (+23 °C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePot life\u003c\/th\u003e\n\u003ctd\u003e≈ 5 hours (+23 °C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAdjustment time\u003c\/th\u003e\n\u003ctd\u003e≥ 20 minutes (+23 °C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWalkable \/ grouting time\u003c\/th\u003e\n\u003ctd\u003e≈ 24 hours (+23 °C) \/ ≈ 50 hours (+5 °C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeat resistance\u003c\/th\u003e\n\u003ctd\u003e−40 °C – +90 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePackaging\u003c\/th\u003e\n\u003ctd\u003e20 kg bag, grey\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStorage\u003c\/th\u003e\n\u003ctd\u003e≈ 12 months\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eWhat is it suitable for?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSubstrates:\u003c\/strong\u003e Cement screed, concrete, lime and cement plaster, drywall, fiber-reinforced cement board, underfloor heating, waterproofing systems, existing coverings, brick, cellular concrete, thermal and sound insulation boards. On gypsum, anhydrite, wood, metal, and PVC substrates after applying Active Prime Fix or Active Prime Grip primer (wood, metal, PVC only indoors).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCovering materials:\u003c\/strong\u003e Gres tiles in all sizes, large format and laminated gres tiles, thin tiles, resin-backed gres tiles, ceramic, natural stone, marble, glass mosaic, glass tiles, terracotta, clinker.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAreas:\u003c\/strong\u003e Interior and exterior, floor and wall, terrace and balcony, facade, swimming pool and fountain, sauna and wellness. Residential, commercial, and industrial projects.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e filling substrate unevenness greater than 15 mm. Without primer on gypsum, anhydrite, wood, metal, and PVC substrates. Not directly on bitumen or tar-based waterproofing membranes — screed is required first.\u003c\/p\u003e\n\u003cdiv style=\"position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/MJEyicDWQ8U?si=UvegC0OVsKYD0Ibl\" title=\"YouTube video player\" style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0;\"\u003e\n  \u003c\/iframe\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is it more expensive than a traditional tile adhesive?\u003c\/strong\u003e \u003cbr\u003eBecause it won’t crack if the substrate moves. The gel formula is flexible with S2 deformability. Repairing a detached facade tile costs many times more than the adhesive.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does the GT-3 rating mean?\u003c\/strong\u003e \u003cbr\u003eGT is Kerakoll’s own test method for adhesive flexibility. It has three levels, with GT-3 being the highest. It measures torsional and bending stress — exactly what large tiles and facades experience.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does C2 TE S2 mean?\u003c\/strong\u003e \u003cbr\u003eImproved adhesion cement adhesive (C2), reduced slip (T), and long open time (E). S2 is the most flexible class — highly deformable, suitable for moving substrates.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for facades?\u003c\/strong\u003e \u003cbr\u003eYes, H40 Tech is specifically designed for this. On facades, apply to both the substrate and the back of the tile (double application). For tile edges longer than 30 cm, the designer may require mechanical fixing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable for very large tiles?\u003c\/strong\u003e \u003cbr\u003eYes, even for tiles up to 160x320 cm. The liquid mixture fully wets the back of the tile. For tiles larger than 60 cm, adhesive must also be applied to the back.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it suitable for underfloor heating?\u003c\/strong\u003e \u003cbr\u003eYes. The flexible bond withstands thermal expansion from turning floor heating on and off. Shear stress will not cause cracking.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen can I walk on it and grout?\u003c\/strong\u003e \u003cbr\u003eAt +23 °C, it is walkable and ready for grouting after about 24 hours. At +5 °C, this extends to about 50 hours. Pools can be filled after 14 days.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much do I need?\u003c\/strong\u003e \u003cbr\u003eApproximately 1.25 kg per square meter per millimeter. A 5 mm bed requires about 6.25 kg\/m². The exact amount depends on the substrate and the size of the notched trowel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should I not choose this?\u003c\/strong\u003e \u003cbr\u003eOn a smooth, stable substrate, \u003ca href=\"\/en\/products\/kerakoll-h40-gel\"\u003eH40 Gel\u003c\/a\u003e is also a flexible, well-proven choice — Tech adds extra performance for facades, moving substrates, and back-buttered tiles with GT-3. If you need a walkable surface within a few hours or are installing water-sensitive natural stone, \u003ca href=\"\/en\/products\/kerakoll-h40-advanced\"\u003eH40 Advanced\u003c\/a\u003e is better with its accelerated adhesion. For a two-component, extreme hybrid bond, choose \u003ca href=\"\/en\/products\/kerakoll-h40-extreme\"\u003eH40 Extreme\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I apply it myself?\u003c\/strong\u003e \u003cbr\u003eApplication with a trowel is simple but requires expertise — especially for large tiles and facades. We also offer installation services; contact us for this.\u003c\/p\u003e\n\u003ch2\u003eH40 System\u003c\/h2\u003e\n\u003cp\u003eH40 is Kerakoll’s structural gel adhesive line — every product tested with the GT method, suitable for porcelain, ceramic, and natural stone. All are suitable for indoor and outdoor use, underfloor heating, terraces, and swimming pools.\u003c\/p\u003e\n\u003ch3\u003eH40 tile adhesive line — which one do you need?\u003c\/h3\u003e\n\u003cbr\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003cth\u003eClassification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral tiling, large tile, underfloor heating\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/en\/products\/kerakoll-h40-gel\"\u003eH40 Gel\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGT-2, C2 TE S1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFast setting, cold weather, water-sensitive natural stone\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/en\/products\/kerakoll-h40-advanced\"\u003eH40 Advanced\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGT-2, C2F TE S1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFacade, moving substrate (wood, metal), large tile reinforced with fabric\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eH40 Tech\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGT-3, C2 TE S2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChemical and thermal resistance, metal substrate, highest strength\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"\/en\/products\/kerakoll-h40-extreme\"\u003eH40 Extreme\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGT-3, R2 T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003eSee the entire H40 range in the \u003ca href=\"\/en\/collections\/ragasztok-csemperagaszto\"\u003etile adhesives\u003c\/a\u003e category. The system is completed with decorative grouts from \u003ca href=\"\/en\/collections\/kerakoll-color-fill\"\u003eColor Fill\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePrimers:\u003c\/strong\u003e on gypsum, anhydrite, wood, metal, or PVC substrates, a primer is required before bonding — \u003ca href=\"\/en\/products\/kerakoll-active-prime-fix\"\u003eActive Prime Fix\u003c\/a\u003e or \u003ca href=\"\/en\/products\/kerakoll-active-prime-grip\"\u003eActive Prime Grip\u003c\/a\u003e (EP21 for H40 Extreme). Highly absorbent cement substrates can be pre-wetted or primed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWaterproofing:\u003c\/strong\u003e in wet areas, H40 provides a monolithic, waterproof system with the \u003ca href=\"\/en\/collections\/vizszigeteles\"\u003eKerakoll waterproofing\u003c\/a\u003e product line.\u003c\/p\u003e","brand":"Kerakoll","offers":[{"title":"Szürke \/ 20 KG","offer_id":56763319189828,"sku":null,"price":30950.0,"currency_code":"HUF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0635\/8027\/4946\/files\/Kerakoll_h40_tech_ultra-hajlekony-csemperagaszto_1.jpg?v=1779020291","url":"https:\/\/www.masterworks.hu\/en\/products\/kerakoll-h40-tech","provider":"Masterworks Hungary","version":"1.0","type":"link"}