The most common method used to join art glass has been lead, forming the matrix for the classic stained glass window. Many contemporary artists have sought to avoid the lead line in their art glass compositions, which brought on the search for alternate methods of assembly. The most significant problem with glass adhesives is that they put stress on the glass as they cure. Cracking has been a constant problem with most adhesives and resins.

Silicone Lamination    Derix has been working for the last 20 years with a two part clear silicone which has solved this problem very well. There was a substantial learning curve to the proper use, especially surface preparation and elimination of bubbles, but the result is a perfectly clear, permanent bond between glass. It is permanent and non-toxic to use. It cleans up easily, unlike normal one part silicone sealants or structural adhesives.

Most importantly, the silicone creates a thin, cured bed between the carrier glass (usually tempered float glass) and the art glass, which allows for gaps and bends in the glass to be accommodated without producing tension in the glass. We have used this process with great success in very many architectural art glass projects in the last two decades.

PVB Lamination    The studio also makes considerable use of the normal industrial method of producing laminated glass - poly vinyl butyrate film. Two sheets of float glass are laminated together permanently under heat and pressure with a tough, transparent film, which increases the strength and adds an important safety factor - the glass will not fly into pieces when broken, but is held together by the film.