What are the best adhesives for bonding polyethylene to other plastics in sculptures?

Bonding polyethylene to other plastics in sculptures can be challenging due to polyethylene's low surface energy, which makes it resistant to most adhesives. However, certain specialized adhesives and techniques can create strong, durable bonds. Here are the best options:

1. Two-Part Epoxy Adhesives: These provide a strong bond when properly applied. Roughening the surface and using a primer designed for polyethylene can improve adhesion.

2. Polyurethane Adhesives: Known for their flexibility and strength, polyurethane adhesives work well for bonding polyethylene to other plastics, especially in dynamic sculptures.

3. Cyanoacrylate (Super Glue) with Primer: While standard super glue often fails on polyethylene, using a polyethylene primer first can significantly enhance bonding.

4. Plastic Welding: For a permanent solution, heat welding or solvent welding can fuse polyethylene to compatible plastics, though this requires skill and equipment.

5. Specialty Polyethylene Adhesives: Products like 3M Scotch-Weld or Loctite Plastics Bonding System are formulated specifically for difficult-to-bond plastics like polyethylene.

For best results, always clean and prepare surfaces thoroughly before applying adhesives. Test a small area first to ensure compatibility and bond strength. By choosing the right adhesive and technique, you can achieve reliable bonds in your plastic sculptures.