There are many types of glue on the market, however we recommend using styrene glue or a plastic weld (Plastruct). Either one of these will work well. We always recommend testing it on a scrap piece of Styrene to ensure that it is compatible with the material that you are trying to connect.
Using some sort of clamps to keep newly glued pieces in place while the glue is drying will help in ensuring a good hold.
Still have questions? Please email us at firstname.lastname@example.org for additional support.