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Always, always, always wear a dust mask when grinding, sanding or cutting thinset or concrete. The dust can eventually cause silicosis which can be deadly!!!


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I would like to add that cleaning the surface with denatured alcohol prior to applying the sealant is absolutely critical. Otherwise you will begin experiencing separation with in a few months.


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Use masking tape to prevent overspreading, and dip your finger in mineral spirits to smooth it out. Remove the tape before the silicone sets. Never use water to smooth silicone, only latex/acrylic. It's difficult to remove silicone from rough or porous surfaces. No problem to remove with razor blade from glass.


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Note that the math is not that easy. You have a HUGE surface compared to your tile size. Even coming in sheets you will have natural variance - even between tiles on the same sheet. The side that you have calculated out perfectly may end up being right in the middle of a tile. That is unless you do the following: Plop down your thinset for the one ...


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To put this in perspective, with my current browser settings, 1/32" is only slightly wider than a capital 'I'. It's narrower than a piece of aggregate in sanded grout. Consider the following (scaled as 1 pixel = 1/32"): Can you tell at a glance which gap is a pixel wider? Keep in mind that it's even less perceptable with lower contrast. How about this ...


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If you have a specific tile in mind, and you have seen this in a store, simply try the slipperyness out by making it wet and rubbing on it. There should be nothing wrong with using a pool tile for a bathroom (except maybe slipperyness), since a bathroom is made waterproof underneath the tiles. If the membrane is intact, you can use any tile meant for wet ...



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