Thinset mortar is a type of adhesive used primarily for setting tiles. It is made from a mixture of cement, fine sand, and water-retaining agents, which help it bond well to surfaces. Thinset is typically applied in a thin layer, allowing for a strong and durable hold for various types of tiles, including ceramic and porcelain. This mortar is favored for its versatility and ease of use. It can be applied to a variety of surfaces, such as concrete, backer board, and drywall. Additionally, thinset mortar can be modified with additives to enhance its performance, making it suitable for both indoor and outdoor applications.