Product Name
3M Scotch-Weld DP8005 Off-White Glue for Polyethylene PE, Polypropylene PP, and TPO Soft Rubbery Plastics (PE, HDPE, LDPE, PP, PPCO, PPHO)
Brief Description
3M Scotch-Weld Structural Plastic Adhesive DP8005 is a two-part acrylic adhesive specifically formulated to create strong, structural bonds on low surface energy (LSE) plastics, including various grades of polypropylene, polyethylene, and thermoplastic elastomers (TPEs/TPOs), without the need for special surface preparation like priming or etching. This solvent-free adhesive offers a convenient, one-step bonding solution for notoriously difficult-to-bond plastics, as well as multi-material assemblies involving metals, ceramics, and wood.
Popular Applications & Uses
- Joining plastics to metals, such as in the manufacture or repair of appliances.- Bonding low surface energy plastics without priming.- Impact-resistant composite bonding.- Manufacture or repair of various sporting goods equipment.- Automotive component assembly and plastic repair.- General industrial bonding where strong, durable joints are required.- Replacement of screws, rivets, plastic welding, and two-step processes involving chemical etchants or surface treatments.- Assembly of small joints.- Sign manufacturing and assembly.
Industries that Commonly Use It
- Aerospace/Defense (for composite bonding and general manufacturing applications)- Automotive Service/Repair (for plastic and multi-material assembly and repair)- Construction/ Building Services (for bonding plastic components and general construction applications)- Fabrication (for general industrial bonding and multi-material assemblies)- General Manufacturing (for appliance manufacturing, general industrial bonding, and diverse material assemblies)- Marine (for bonding plastics in marine applications, e.g., kayak repair)- Medical Device/ Prosthetics (for bonding plastics and multi-material assemblies in device manufacturing)- Metal Fabrication (for bonding plastics to metals)- Plastic Fabrication (as it's specifically designed for difficult-to-bond plastics)- Sign & Display (for sign manufacturing and assembly)- Transportation/ Specialty Vehicle (for component assembly in vehicles)
Special and Unique Features
- Creates strong bonds on low surface energy (LSE) plastics like polyolefin with minimal or no surface preparation required.- Formulated to bond multi-material assemblies, including LSE plastics, thermoplastics, composites, and metals.- Solvent-free adhesive system.- Contains 8 mil (0.20 mm) spacer beads for consistent bond line spacing.- Resists many chemicals, water, humidity, and corrosion for durable performance.- Can replace mechanical fasteners like screws and rivets, as well as plastic welding.- High tolerance to greasy surfaces.
Key Properties
- Chemical Base: Two-part acrylic.- Mix Ratio (by volume): 10:1 (Base:Accelerator).- Work Life: Approximately 3 minutes at 72°F (22°C).- Handling Strength: Achieved in approximately 3 hours.- Full Cure Time: 8-24 hours at 72°F (22°C).- Viscosity: Medium, allowing for controlled dispensing and good surface wetting.- Color: Off-White (also available in Black).- Hardness: 60 Shore D.- Shear Strength: 2400 Pound-Force Per Square Inch at 72°F (22°C).- Peel Strength: 17 Pound Per Inch (Of Width) at 72°F (22°C).
Surface Compatibility
- Polyethylene (PE, HDPE, LDPE)- Polypropylene (PP, PPCO, PPHO)- Thermoplastic Elastomers (TPEs/TPOs)- Metals- Ceramics- Wood- Most other plastics (e.g., ABS, PVC, polycarbonate, though specifically excels with LSE plastics).
Known backups / known substitutes
- 3M Scotch-Weld Structural Plastic Adhesive DP8010/DP8010NS (a non-sag version with similar properties).- Permabond TA4631 (another adhesive for HDPE).- 3M VHB (Very High Bond) Tapes (for LSE applications, though a different form factor).- JB Weld Plastic (a cheaper alternative, may require good surface prep).- Cyanoacrylate adhesives (Super Glue) can bond LSE plastics but may lack strength and often require surface treatment.- Epoxies (generally not considered the best for LSE plastics without surface treatment).
Comparison Note
Unlike many conventional adhesives, 3M Scotch-Weld DP8005 is uniquely formulated to bond low surface energy plastics (like PE and PP) effectively without the need for extensive surface preparation such as chemical etching, plasma, flame, corona treatment, or priming. While other adhesives like cyanoacrylates or epoxies exist for plastics, they often struggle with LSE substrates or require additional, time-consuming surface treatments to achieve a strong bond. DP8005 offers a one-step, structural bonding solution that can replace mechanical fasteners and welding, providing durable, chemical, water, and humidity resistant joints.
