{"product_id":"schluter-set-unmodified-mortar","title":"Schluter® SET Unmodified Mortar White","description":"\u003cp\u003e\u003cstrong\u003eSchluter SET®\u003c\/strong\u003e is the unmodified thin-set mortar that Schluter specifically engineered for use with their membranes. When you're installing DITRA over a concrete slab or bonding tile to a DITRA\/DITRA-HEAT membrane, this is what Schluter requires — and using it is what keeps the warranty intact.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy unmodified matters:\u003c\/strong\u003e The \"unmodified\" classification means no polymer additives. Polymer-modified mortars can create a slip plane in certain conditions when used between two non-absorptive surfaces (like tile over DITRA membrane) — the polymer never fully cures without absorption. Unmodified SET cures properly every time in that assembly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey specs:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType: Unmodified thin-set mortar (ANSI A118.1)\u003c\/li\u003e\n\u003cli\u003eColors: Grey and White\u003c\/li\u003e\n\u003cli\u003eShelf life: 2 years (unopened, not frozen)\u003c\/li\u003e\n\u003cli\u003eGrout wait: 12 hours at 70°F\u003c\/li\u003e\n\u003cli\u003eLifetime warranty when used correctly with Schluter products\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhen to use SET:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBonding DITRA or DITRA-HEAT to \u003cstrong\u003econcrete\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBonding DITRA or DITRA-HEAT to \u003cstrong\u003egypsum\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSetting tile \u003cstrong\u003eover\u003c\/strong\u003e any DITRA\/DITRA-HEAT membrane\u003c\/li\u003e\n\u003cli\u003eKERDI installation on most surfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhen to use ALL-SET instead:\u003c\/strong\u003e If your subfloor is plywood or OSB (wood), use ALL-SET (modified) — wood needs the polymer for adequate bond strength.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePro Tip:\u003c\/strong\u003e Mix SET to a slightly more fluid consistency when bonding the membrane to the substrate (more water) and a stiffer consistency when setting tile on top (less water). The Schluter installation guide lists specific water ratios — it's worth following them precisely the first time.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDon't substitute a generic unmodified thin-set\u003c\/strong\u003e if you want to maintain the Schluter warranty. The warranty specifically requires Schluter SET, ALL-SET, FAST-SET, or Schluter-listed equivalents.\u003c\/p\u003e","brand":"Schluter","offers":[{"title":"White","offer_id":48064056033447,"sku":"SET50W","price":31.79,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0569\/3954\/4743\/files\/set-white.jpg?v=1779735883","url":"https:\/\/www.yourfloors.ca\/products\/schluter-set-unmodified-mortar","provider":"yourfloors","version":"1.0","type":"link"}