Best for Adhesives & Glue, Fasteners, Paint Accessories
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Short answer: WALL = YES. FLOOR = NO.
Even though the product page says:
“Use for installations of ceramic tile and natural stone tile on interior walls and floors”
Industry standards and Bostik’s own technical guidance make it clear: Mastic (D‑2001) should NOT be used on floors.
Excellent sag resistance (tiles don’t slide)
Easy to trowel
Strong bond for ceramic wall tile
Works well in dry or intermittent‑moisture areas
Ideal for:
Bathroom walls
Kitchen backsplash
Shower dry walls
Interior vertical surfaces
Even though the page lists “floors,” mastics are not suitable for floor installations because:
Floors require cement‑based thinset, not mastic
Mastic softens with heat and moisture
Cannot handle foot traffic load
Risk of tile loosening or failure
Not approved for wet floors (bathroom, kitchen, basement)
All professional tile installers avoid mastic on floors.
| Area | Suitable? | Notes |
|---|---|---|
| Ceramic Wall Tile | ✔ Yes | Best application |
| Ceramic Floor Tile | ❌ No | Use thinset |
| Natural Stone Wall Tile | ⚠️ Light duty | Stone is heavy; thinset preferred |
| Wet Areas (showers, floors) | ❌ No | Mastic not moisture‑stable |
Bostik Ultra Premium Mastic is designed for a fast, professional installation of ceramic tile, including large format ceramic tiles on floors and walls. This product is immediately usable right out of the container for interior applications (floors and walls) and can grab to most substrates including drywall, concrete, cement block, and backer board.
From backsplashes in small kitchens to the floors of multiple story buildings and everything in between, Schillings has the right size, color, quantity, and of course price on the project of your dreams!
Best for Adhesives & Glue, Fasteners, Paint Accessories


Hello! Need help? Don’t worry, I’ve got you. Tell me what’s up, and I’ll be happy to assist 💁