Is Kerdi-Fix worth the price over regular silicone?

For Kerdi and Kerdi-Board installations, yes. Schluter approves it for sealing membrane seams and penetrations, and it bonds to damp surfaces, which most silicones do not. For general caulking away from Kerdi, a cheaper sealant will do.

Can I use Kerdi-Fix with other waterproofing membranes?

It is formulated for Schluter Kerdi and Kerdi-Board. Other membrane makers specify their own sealants, and mixing systems can void their warranty, so check the membrane manufacturer first.

How much coverage does one 9.81 fl oz cartridge give?

Coverage depends on bead size. A thin bead along seams and around a few pipe penetrations goes a long way, but a full shower with many corners and valves can take two or more cartridges. Buy a spare for a complete pan and wall build.

Does Kerdi-Fix work outdoors and on metal?

Yes. It is rated for outdoor use and bonds to metal, which makes it useful for sealing flashings, pipe collars and metal trim in exterior wet areas.

When is Kerdi-Fix cheapest?

It rarely goes on deep discount because it is a specialty product. The best new price was $29.74 at The Home Depot as of November 4, 2026, across seven stores listing it, so compare those listings before buying several cartridges.

Where is the Schluter Kerdi Fix cheapest?

At The Home Depot, for $29.74, as of our latest check.

What do buyers say about the Schluter Kerdi Fix?

Rated 5 out of 5 from 3 ratings.

Where can I buy the Schluter Kerdi Fix?

7 stores we checked sell it, including The Home Depot, Amazon, Tilefy, Lowe's, Tile Tools HQ.

Schluter Kerdi Fix

Best price now

$29.74at The Home DepotObserved at 7:07 PM

Compared across 7 stores. Prices are checked against each store and labelled with when.

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Our take on the Schluter Kerdi Fix

Kerdi-Fix is a single-component waterproofing adhesive and sealant made for Schluter's Kerdi shower membranes and Kerdi-Board. It bonds to tile, metal, glass, stone and most common building materials, and it can be applied to damp surfaces. The 9.81 fl oz (290 mL) cartridge is gray. At $29.74 at The Home Depot as of November 4, 2026, it sits at the low end of what the seven stores listing it charge.