What is the best glue for plastic models?
Types of Glue for Plastic Models
Solvent-based cements are the standard for polystyrene plastic models. They work by dissolving the plastic slightly, creating a weld when the solvent evaporates. This gives a strong, invisible bond. Common brands include Tamiya, Testors, and Mr. Hobby.
For clear parts like windows and canopies, solvent cements can fog the plastic. Instead, use white glue (PVA) or specialized clear part glue like Testors Clear Parts Cement. These dry clear and are less aggressive.
For metal, resin, or painted parts, cyanoacrylate (super glue) or two-part epoxy is better. Super glue bonds quickly but can fog clear parts and leave white residue. Epoxy is strong and gap-filling but slow to set.
- Solvent cement: best for general plastic-to-plastic bonds.
- White glue: safe for clear parts, dries clear.
- Super glue: for metal, resin, or quick repairs.
- Epoxy: for heavy parts or gap filling.
How to Choose
Consider the application: for small, precise joints, a thin liquid cement applied with a brush is ideal. For larger gaps, a thicker gel cement or epoxy works better. If you need time to position parts, use a slow-setting glue.
Ventilation is important with solvent cements as fumes can be strong. Always work in a well-ventilated area. Also, keep glue away from finished surfaces to avoid damage.
Common mistakes
- Using too much glue can melt details and create a mess; a little goes a long way.
- Super glue can fog clear plastic, so avoid it for windows and canopies.
- Not all glues work on all plastics; test on a sprue first.