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Will New Thinset Stick To Old Thinset? [Solved]

You can put new thinset on top of old, but only if the old thinset is perfectly smooth and level. This is rarely the case once the old tiles have been removed. The best option to smooth out the old thinset and prepare it for new tiles is to grind it down.

Thinset for Tile…DO’s and DON’Ts with Jeff Paterson of Home Repair Tutor

In the first part of the video, I talk about a technique called Spot Bonding that

How To Bond New Concrete To Old Concrete With Thinset

From https://www.swimmingpoolsteve.com/pages/

Thinset on Concrete

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