ARDEX ENDURA WA91 EPOXY ADHESIVE AND GROUT, White, 4.2 KG

91 000 74051 It's a high-performance three-part epoxy tile adhesive and grout (adhesive + grout in one). Designed for special/advanced use cases: metal, fiberglass (GRP/FRP), impervious surfaces (e.g. metal, coated sheets), moisture-sensitive natural stones and agglomerates, or surfaces that water-based adhesives can't bond well to. Once applied and cured it offers strong bond strength, chemical resistance, water-impermeability, and durability under mechanical stress or vibration — making it suitable even for submerged or wet conditions (e.g. pools, humid areas, bathrooms, possibly outdoor wet surfaces) The adhesive supports tile joint width 2–10 mm. For grouting, wait until it hardens (typically ~8 hours under standard conditions) before grouting. �� When & Where to Use It You'd pick WA 91 when you have: Tiles or stones on non-traditional substrates: metal, fiberglass, existing tiles, cement-board, plasterboard, or moisture-sensitive natural stones. Wet areas, chemically-exposed areas, or areas needing high durability — e.g. pool linings, bathrooms, kitchens, industrial/commercial floors, places subject to moisture or chemicals. Vertical walls or situations where "non-slump" adhesive is needed so tiles don't slide down before curing. ⚙️ Application & Technical Details It's a 3-part system: Part A (resin), Part B (hardener liquid), Part C (powder) — all three must be properly mixed. Density ~ 1.61 g/cm³ when mixed. Pot life ≈ 45 minutes, open/adjustable time ~ 20-25 minutes. Setting/hardening time: ~24 hours (but grout joints can be done in ~8 hours under typical room conditions). Mechanical strengths are high — e.g. compressive strength ~ 60 N/mm². Water absorption: nil (so it remains waterproof once cured). �� Pros & �� Limitations to Keep in Mind Pros: Excellent bond and adhesion on difficult or non-porous surfaces. Very water- and chemical-resistant — good for wet, industrial, or high-usage areas. Can be used for both floor and wall tiles. Once applied properly, highly durable and long-lasting. Things to Note: Needs careful mixing (3-part system). Incorrect mixing can compromise adhesion. Pot life and working time are limited — must work relatively fast. Surfaces must be properly prepared (clean, dry, no dust/grease, etc.) for good adhesion. Slightly more "technical"/"professional-level" than simple cementitious tile adhesives — more suited for projects with challenging substrates or high demands.