What purpose does an adhesive type mastic serve?

An adhesive type mastic serves primarily to hold insulation materials in place. These mastics are specially formulated adhesives that create a strong bond between the insulation and the substrate, ensuring that the insulation remains securely attached during use. This secure attachment is critical as it prevents the insulation from shifting or settling over time, which could compromise its thermal performance.

While it’s true that mastics can sometimes have properties that allow for certain compatibility with materials, the primary function focuses on securing insulation. Other options involve different functions: waterproof seals, thermal resistance, or prefabrication of fittings, which are not the main roles of adhesive mastics in the context of insulation. These functions are typically achieved through different specialized materials or methods, highlighting the specific purpose of adhesive mastics in providing strong adhesion in insulation applications.