What is the stuff you use to stick tile in a mosaic to the canvas?

To stick tiles in a mosaic to the canvas, you typically use a strong adhesive like tile adhesive or thin-set mortar. These products are designed to bond well with both the tiles and the substrate. For smaller projects or delicate tiles, you might also use a craft glue or silicone adhesive. It's important to ensure the adhesive is suitable for the materials you're working with to achieve a durable finish.