Mapei Ultramastic III D2TE Ready-to-Use Tile Adhesive

Product Overview

Developed by Mapei in Italy, Ultramastic III is a water-dispersion (paste) tile adhesive that is ready to use straight from the bucket with no mixing required. Based on special acrylic resins, it features excellent thixotropic properties — tiles adhere immediately without slippage. Once cured, it offers outstanding flexibility and bonding strength, able to withstand vibrations and deformations in building materials. Especially recommended for flexible, deformable non-metallic substrates.

Key Features

• Ready to use — no water or mixing required, apply directly from the bucket, saving preparation time
• Non-slip — excellent thixotropic properties keep tiles stable immediately after placement on vertical surfaces
• Extended open time — generous working time (per manufacturer data) for precise tile positioning
• High flexibility — excellent deformability after curing, accommodates minor substrate movement and vibration
• Wide substrate compatibility — suitable for plywood, gypsum board, painted surfaces and other special substrates
• Easy application — white paste consistency, easy to trowel, tools clean with water

Applications

• Indoor wall, floor and ceiling installation of all types of ceramic tiles and mosaics
• Outdoor wall installation of ceramic tiles and mosaics
• Bathroom and shower room walls and floors
• Moisture-resistant plywood (wood substrates must be stable and moisture-proof)
• Cement renders and concrete substrates
• Precast or cast-in-place concrete walls
• Gypsum plaster, gypsum board
• Stable painted wall surfaces (paint must be firmly bonded and tiles must be absorbent)
• Over-tiling on existing ceramic tiles (at least one surface must be absorbent)
• Large-format tiles
• Underfloor heating systems
• Bonding of thermal and acoustic insulating panels

Not Suitable For

• Permanently submerged areas (swimming pools, water features, etc.)
• Substrates subject to rising damp
• Non-absorbent tiles on non-absorbent substrates
• Metallic substrates or non-moisture-stable wood substrates
• Natural stone (especially light-coloured calcareous stone such as Carrara marble)

Packaging

• 16 kg plastic bucket
• 12 kg plastic bucket
• 5 kg plastic bucket
• 1 kg plastic container (12-piece pack)

Storage

Shelf life in original sealed packaging — refer to packaging label. Protect from frost.

Important Notes

• Substrate must be sound, clean, and free from grease, wax and loose material
• Cement substrates must be thoroughly dry with no rising damp
• Gypsum surfaces do not require primer but must be dry and solid
• Outdoor installations must be adequately protected from rain; drying time depends on weather and humidity conditions
• Avoid application in very cold or damp weather
• Wear protective gloves and goggles during application
• For professional use only

For detailed application methods, coverage rates and technical parameters, please refer to the official product data sheet

FAQ

Not sure which tile adhesive to choose? These articles can help

• Tile Adhesive vs Cement-Sand: Which is Better for Tiling?
• C1 vs C2 Tile Adhesive: Tile Type Determines the Right Choice
• Complete Tile Adhesive Guide: All EN 12004 Grades Explained