Glossary Term
Unmodified Thinset
Definition
A tile adhesive mortar that contains no latex or polymer additives. Required by Schluter Systems when bonding KERDI membrane — latex-modified thinset can retain moisture and cause debonding over time, particularly in steam shower applications. Using the wrong thinset with a Schluter system voids the warranty.
Where You'll See This Term
On Schluter installation documentation, contractor bids specifying materials, and product bags at tile supply stores.