Compared across 6 stores. Prices are checked against each store and labelled with when.
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Kerdi-Fix is a one-part, solvent-based sealant and adhesive from Schluter's tile and waterproofing line. It bonds Kerdi and Ditra membrane to itself, to metal, wood, concrete and plastic, and seals pipe collars, corners and drains in wet areas. It cures to a flexible, waterproof bond and can be used outdoors. At $29.74 for a 9.81 fl oz cartridge at Lowe's as of November 4, 2026, it sits at the low end of its recent range across the 6 stores that stock it.
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Lowest price we've seen: $29.74 on Nov 5 at Lowe's. Tracked across 6 stores since Nov 5.
Tile setters and DIY shower builders treat Kerdi-Fix as the go-to for sealing membrane seams, corners and pipe penetrations. It is valued for sticking to nearly anything and staying flexible, though users complain about the smell and the price per tube.
