Which type of tile can be used as a direct bond adhesive?

The correct choice is dry set tile adhesive. Dry set adhesives consist of a mixture of cement, sand, and other ingredients, resulting in a product that can be used for bonding tile directly to a substrate without the need for additional additives. This type of adhesive is particularly advantageous for porcelain and ceramic tiles in interior installations where moisture levels are not excessively high.

Dry set adhesives meet various ANSI A118 standards for performance and are widely accepted in the industry, making them a common choice for installers. They provide reliable adhesion when used in dry conditions and form a strong bond over time, ensuring the tiles remain securely attached.

Other types of adhesives mentioned in the choices serve different functions or conditions. Thin-set is often a broader category that can include dry set and modified thin-set adhesives, but it does not specify the key characteristics that make dry set preferred in direct bond scenarios. Modified adhesives typically contain additional polymers that enhance their performance in specific conditions, such as high moisture areas, but they might not be the standard choice for direct bonding in all cases. Self-leveling compounds, while useful for subfloor preparations, are not designed for tile adhesion but rather to create a smooth, level substrate before tiles are installed.