Mosaic crystal grout, tile sealant, waterproof and mildew-proof, for crafts -- 30g + gloves + scraper + sponge

Tile adhesive, or tile mortar, comes in different brands and with a range of technical specifications. Standard ready-mixed adhesive, C1, C2, C2T, C2F, C2G tile adhesive... it can be hard to know where to start but applying the wrong tile adhesive can result in it quickly becoming unstuck.