The tight fit of the weatherstrip in the body aperture secures the areas of glass and binds them in place with a special adhesive. Fixing the glass which had been set is a tough, messy, and time consuming operation, which the home mechanic cannot handle. Secure, airtight fit is difficult to achieve without a lot of practice, and comes with a great likelihood of breaking, especially with laminated glass windshields. Hence, it is highly recommended that such a work should be conducted by specialized windshield fitters by the owners.