Ardex Endura WA 91 Tile adhesive

About Ardex Endura WA 91 Tile adhesive

•  91 000 74051 Its 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 cant 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 210 mm. For grouting, wait until it hardens (typically ~8 hours under standard conditions) before grouting. 

Youd 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 dont slide down before curing. 

• Its a 3-part system: Part A (resin), Part B (hardener liquid), Part C (powder) all three must be properly mixed.

• Density ~ 1.61 g/cm 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/mm.

• Water absorption: nil (so it remains waterproof once cured). 

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.