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Thin-set is a type of cement-based mortar that is specifically designed for adhering tiles to a substrate, often used when installing tiles on floors and walls. Its composition allows for a thinner layer of mortar to be applied, usually around 3/16 of an inch or less, making it ideal for various tile applications, especially in situations where you want to minimize height or ensure a flatter surface.

Mud set, on the other hand, involves using a thicker layer of mortar, typically several inches, to create a solid base for tile installation. This method is often employed when installing larger tiles or on surfaces that require additional support and leveling, such as uneven floors. The thicker bed of mortar in mud set provides greater strength and helps in compensating for surface imperfections.

In summary, recognizing that thin-set is generally a cement-based adhesive suitable for most installations and that mud set involves a thicker layer of mortar for specific applications highlights the fundamental differences in their formulation and usage in tile setting.