What is the primary role of sealants in glazing?

The primary role of sealants in glazing is to provide weatherproofing and structural support. Sealants are essential in creating a protective barrier against environmental elements such as moisture, air, and pollutants, ensuring that the interior of a building remains safe and comfortable. They also help prevent water infiltration and damage by creating a watertight seal around the edges of glazing systems.

In addition to weatherproofing, sealants play a critical role in supporting the structural integrity of the glazing installation. They assist in adhering glass to framing materials and contribute to the overall stability of the system during various environmental stresses, such as wind load and temperature variations.

The other choices, while related to glazing, do not capture the primary functional aspect of sealants. For example, while improving bonding is a benefit, it is not the primary purpose. Likewise, sealants do not serve decorative functions or change the color of glass, which are aspects unrelated to their main role.