When it comes to gluing Styrofoam, it is important to use the right type of glue to ensure that the pieces stick together and do not fall apart. Here are some of the best glues to use on Styrofoam:

• Styrofoam Glue: The best glues to use on Styrofoam are the actual Styrofoam glues such as UHU Styrofoam glue, Weldbond, and 3M 77. Styrofoam glue comes in both tubes and spray.

• Hot Glue: Hot glue from a hot glue gun is also a great option for gluing Styrofoam. However, it is important to use a low heat setting because high temperatures can melt the Styrofoam.

• Liquid Glue: Liquid glue can also be used to glue Styrofoam. Elmers Glue-All Multi-Purpose Liquid Glue is a great option that dries quickly and is budget-friendly. Liquid Nails Project and Foamboard Adhesive is another option that is specifically designed to stick to Styrofoam and is heavy-duty for larger projects.

It is important to avoid using glues that contain solvents that can dissolve plastic, as Styrofoam is essentially "foamed" plastic. Additionally, it is recommended to wipe down both the Styrofoam and the project surface with a clean, dry rag to remove any dust or debris before applying the glue.