Joining acrylic sheets (also known as Perspex) requires the right adhesive and technique to achieve clean, strong, and invisible bonds. Unlike standard glues, acrylic bonding uses solvent cement that chemically fuses the surfaces, creating a seamless join when done correctly.
Solvent cement is recommended for joining acrylic. There are two techniques for solvent cementing, capillary and dip or soak methods.
Capillary cementing
This is the most popular acrylic joining method. However, this method will not work at all unless the parts to be joined fit together PERFECTLY.
Make sure the parts fit properly. Then join them with masking tape or clamp them in a form to hold them firmly in place. It is important that the joint be in a horizontal plane, or the cement will run out of the joint.
Apply the cement carefully along the entire joint. Apply from the inside of a box-corner joint, and on both sides of a flat joint. A needle-nosed applicator bottle is recommended. The thin cement will flow into the joint through capillary action and form a strong bond. Maximum bond strength will not be reached for 24 to 48 hours.
Soak or dip cementing
This is suggested only for THICK joints.
Viscous cementing
Viscous cements are used for joints that can’t be cemented with capillary or soak cementing, either because the joint is difficult to reach or because the parts don’t fit properly. Viscous cement is thick and will fill small gaps. It can make strong transparent joints where solvent can’t.
You can make your own viscous cement by dissolving chips of clear acrylic sheet in a small amount of solvent.
Apply a small bead of cement to one side of the joint, join the pieces, and tape or clamp in place until cured.
Pro Tips for Joining Acrylic Sheets
- Always ensure surfaces are smooth and fit perfectly before bonding.
- Use masking tape or clamps to keep pieces aligned and stable.
- Choose a needle applicator for precise cement application.
- Avoid moving or stressing the joint during curing (24–48 hours).
- Work in a dust-free environment to avoid bubbles and marks.
- Test on scrap acrylic first if you’re new to acrylic bonding.
Safety Precautions
- Work in a well-ventilated area, as solvent fumes can be strong.
- Wear gloves and safety glasses when handling solvent cement.
- Keep solvent cements away from open flames or heat sources.
- Avoid skin contact. Wash immediately if exposed.
Store adhesives tightly sealed when not in use.