The best way to glue two pieces of clear plastic together, especially acrylic, is by using acrylic cement, a solvent-based adhesive.
Understanding Acrylic Cement
Acrylic cement isn't a glue in the traditional sense. It's a solvent that melts the surfaces of the acrylic pieces you're joining. This process creates a chemical bond, essentially fusing the two pieces into one solid piece.
Why Acrylic Cement is Ideal:
- Clear Bond: It provides a virtually invisible bond, maintaining the clarity of the plastic.
- Strong Bond: The chemical fusion creates a very strong and durable bond.
- Specifically for Acrylic: It's formulated specifically for acrylic, ensuring optimal adhesion.
How to Use Acrylic Cement:
- Prepare the Surfaces: Ensure the surfaces of the plastic pieces are clean, dry, and free from dust, grease, or other contaminants. Isopropyl alcohol is a good cleaning agent.
- Apply the Cement: Acrylic cement is very thin and watery. It's typically applied using a needle applicator or a syringe. Apply a small amount along the edges to be joined.
- Join the Pieces: Immediately bring the two pieces together and hold them firmly in place.
- Hold and Cure: Maintain pressure for the recommended curing time (usually a few minutes). Refer to the specific instructions on the acrylic cement product you're using. Full curing strength is typically achieved after 24-48 hours.
- Ventilation: Work in a well-ventilated area, as acrylic cement fumes can be strong.
Important Considerations:
- Precision: Apply the cement carefully, as it can easily flow onto unwanted areas.
- Clamping: For larger pieces, use clamps to ensure even pressure during the curing process.
- Safety: Wear appropriate safety glasses and gloves.
- Alternatives: While acrylic cement is best for acrylic, other adhesives like epoxy or cyanoacrylate (super glue) can be used for other types of clear plastics, but these may not provide as clear or strong a bond. Test in an inconspicuous area first.
