Mastic come pre mixed which thinset come in a bag that you have to mix with a mixer mastic is not good for your wet areas meaning showers or on the floor. Used mainly for back splashesr thinset is port base like cemet very strong used in wet areas outside for all types of tile installation
same thing
With thinset.
It depends on the size of the tile. Use a smaller 5/32" V-Notch Trowel for 3/4" or smaller glass mosaics, a 1/4" x 1/4" trowel for 2" x 2" mosaic tiles. For bigger 12" x 12" or heavier tiles use a trowel with bigger notches like 1/2" x 1/2" so the bond mortar (thinset) will be thicker. The 2011 Tile Industry Standards define the minimum bond layer thickness to be 3/32" after beat in, but the maximum thickness has more to do with the manufacturer of the thinset mortar you are using. Many "thinsets" max out at 1/4" in a single layer. "Medium Bed" types of thinset may go up to 1/2" or more, but you must follow the manufacturer's instructions. Thinset mortars made thicker than they were designed for can shrink and crack the tiles.
one bag of thinset can cost about 13 dollars for versabond wich I recommend as a tile setter for 15 years. One bag can 60-80 square with a quarter inch trowel and less with bigger trowels. 3 eighths trowel about 40-50 square. The bag at home depo explains all.
Any thinset will workb
Mastic come pre mixed which thinset come in a bag that you have to mix with a mixer mastic is not good for your wet areas meaning showers or on the floor. Used mainly for back splashesr thinset is port base like cemet very strong used in wet areas outside for all types of tile installation
same thing
Thinset or silicone, both sold at "DIY" stores and pool supply stores.
With thinset.
White thinset
Modified thinset or An approved tile mortar.
The thin set you should use over plywood is called Durabond. Durabond is a water-based coating that dries to a hard, durable finish. It can be applied directly to new or old drywall and will not cause any harm if it comes in contact with insulation.
There is no way to dissolve it. It must be physically scraped off.
The videos which suggest lifting a tile to check the thinset coverage on the back are right. If you are installing tile for the first time, this is a necessary step to be sure you have the technique right. For floor tile up to about 12" x 12", you'll use a 1/4" x 1/4" square-notched trowel. For larger tiles, you should use a bigger trowel - about 3/8" or so. Dip some thinset from the bucket, drop it on the floor, and then spread it out. Hold your trowel nearly vertical at the edge, with just a slight angle so you can drag out the thinset. It should leave deep grooves in the thinset that stand up on their own, and you should be able to see the floor surface between the grooves. When you place the tile, hold it as level as you can and then carefully place it on top of the thinset. Wiggle it back and forth slightly, as you apply LIGHT pressure downwards, and evenly. You want the thinset to make good contact on the back of your tile, but not so much that you flatten it out. If thinset is oozing up between tiles, you're pressing too hard. Check to see that there is no "lippage" - or uneven heights between adjoining tiles. The surface should be perfectly level to surrounding tiles. Peel up a tile, and check the thinset coverage on the back. It should cover at least 75% of the back of the tile. If it is less, then you're either not pressing hard enough, not using enough thinset or spreading it too thin, or your floor surface is too uneven. If all looks good, scrape the thinset off the tile and that section of floor where it was removed, and reapply and reinstall.
This sounds as though there is not enough thinset under the tile. Or your thinset didn't properly bond to the tile. There is no real way to fix this besides pulling the tile up. If they haven't already, the tile will likely start cracking.
Thinset tile cement.