Apply approved adhesive to the exposed styrofoam back of the moulding using 3/8″ notched trowel. Approved adhesives include dry or wet primus, also known as acrylic base coats, available through your supplier of Priority One Moulding products. We have seen caulking used to apply and treat joints of Priority One Moulding and do not disapprove or approve of this method of application, but note that caulking has a limited life expectancy. The preferred adhesive is wet primus. Mount the moulding while scrapping any excess adhesive off.

Various pieces of moulding can be joined to form corners, or run in straight lengths. To do this, the treatment of joints is most important and we recommend cutting the pieces with a diamond blade saw, or having Priority One Moulding manufacture the necessary returns and corners for your project. To treat the joints, we recommend that an acrylic base coat be applied over the joint after the joint is meshed with an approved mesh (both materials are available at your supplier of Priority One Moulding ). At this time, any imperfections and damage sustained while installing the pieces must be fixed and the joint should be sanded smooth to accept the final finish coat properly. The best method is to use wet foam brushes to feather out the primus on the joint. We are aware caulking is used on job sites and do note that caulking has a limited life. A sealant should be applied to the entire profile prior to whatever finish is to be applied.