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Old 02-20-2019, 05:43 PM   #1
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tiling over a lime plaster (X-Kalibur) wall

I have heard that lime can be difficult to bond to. I want to do a kitchen backsplash over a wall plastered with X-kalibur brand veneer plaster. Do I need any special type of adhesive or will regular modified thinset work well for bonding ceramic tiles to the wall. This is a one-coat veneer plaster over 1/2" plaster blueboard.

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Old 02-20-2019, 06:08 PM   #2
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I've never used that brand but if it's a base coat and finish coat all in one then I think you could tile over it without a problem. I usually want to stick a scrap piece of tile to it and let it set over night to see how it bonds using thinset.

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Old 02-20-2019, 06:32 PM   #3
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X-kalibur can either be used as a finish coat over a base coat or all by itself in a single coat application. It does not have any sand in it like a typical basecoat and therefore is not as strong.
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Old 02-20-2019, 07:33 PM   #4
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National Gypsum requires a bonding agent when applying that product over concrete, Steven, so I'd be curious about bonding directly to it with a Portland cement thinset mortar. I think your best bet would be to contact NG in your area. You have no geographic location in your User Profile so I can't guess which area that might be.

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