Can I apply Type 1 or Ultramastic ECO over waterproofing membranes?

No; instead, use an appropriate MAPEI polymer-modified thin-set mortar that meets the requirements of ANSI A118.4 or ANSI A118.11, or an epoxy mortar that meets the requirements of ANSI A118.3.

Products

Type 1
Type 1
Premium Tile Adhesive Type 1 is a premium-grade, traditional, nonflammable,…
Ultramastic ECO
Ultramastic ECO
High-Performance Floor and Wall Tile Adhesive Ultramastic ECO is a premium,…

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