PLEXUS PU2105 400ml Cartridge (1:1) Polyurethane Adhesive 21050

Product Name

PLEXUS 2105 400ml Cartridge (1:1) Polyurethane Adhesive 21050

Brief Description

Plexus PU2105 is a high-strength, two-part structural polyurethane adhesive designed to form rigid connections with a wide variety of substrates. It features an easy-to-use 1:1 mix ratio, low exotherm, and no odor, offering a combination of high strength and stiffness.

Popular Applications & Uses

- Bonding composites (FRP, epoxy, DCPD, Gelcoat, Phenolics, RIM)- Bonding thermoplastics (PC-PET Blend, ASA Blends, PMMA, Noryl, treated TPO, HDPE, PP blends)- Bonding metals (Aluminum, Stainless Steel, Raw Steel, coated metals, galvanized steel)- Bonding wood, concrete, and cement- General industrial and transportation manufacturing- Gap filling applications

Industries that Commonly Use It

- Aerospace/Defense- Automotive Service/Repair- Cabinet & Woodworking- Chemical Industry- Cladding- Concrete- Construction/ Building Services- Countertop- Fabrication- Furniture- General Manufacturing- Government & Military- Industrial Supply- LED/Electronics- Marine- Metal Fabrication- Plastic Fabrication- Transportation/ Specialty Vehicle

Special and Unique Features

- High-strength two-part structural polyurethane adhesive- Easy to use 1:1 mix ratio- Low exotherm and low odor- Excellent environmental resistance- Excellent gap filling and thixotropic (non-sagging gel)- Low shrink properties- Primerless adhesion to metals and treated olefin plastics (with specialty adhesion promotor)- Fast strength development and quick cure- Long shelf life at room temperature

Key Properties

- Mix Ratio: 1:1 by volume- Working Time: 3 to 5 minutes (typically 3-4 minutes)- Fixture Time: 40 to 50 minutes- Tensile Strength: 4,060 psi (28 MPa)- Lap Shear Strength (on Al 6061): 1,450 psi (10 MPa)- T-peel Strength (on Al 3003): 60 pli (10.5 N/mm)- Tensile Elongation: 5%- Viscosity (Adhesive A): 74,000 cP- Viscosity (Activator B): 68,000 cP- Non-sagging gel consistency- Low VOCs

Surface Compatibility

- Composites: DCPD, FRP, Gelcoat, Phenolics, Epoxy Based Composites, RIM- Thermoplastics: PC-PET Blend, ASA Blends, PMMA, Noryl, treated TPO, HDPE, PP blends- Metals: Aluminum, Stainless Steel, Raw Steel, Coated metals (Powder coated or E-coated Metals), galvanized steel- Wood- Concrete- Cement- Surfaces should be free of grease, dirt, and other contaminants- For plastics and metals, clean with a dry rag or solvent-dampened rag- Composites may require light abrasion to remove mold releases, then wiped to remove dust

Known backups / known substitutes

- Plexus H4110 (another ITW Performance Polymers adhesive, especially for TPO bonding)- Other Plexus MMA (methyl methacrylate) adhesives like MA8105, MA8110, MA205HV, MA300, MA310, MA320, MA330, MA420, MA420FS, MA832, MA920 (serving similar structural bonding purposes for various substrates)- General structural adhesives from Huntsman (epoxies, polyurethanes, methacrylates)- VST Tapes (viscoelastic acrylic foam tapes) for high-bond strength and weather resistance- LOCTITE Epoxy Adhesive, HY 4060 Series- SYSTEM THREE RESINS GelMagic Epoxy Adhesive

Comparison Note

Plexus PU2105 is a polyurethane adhesive, offering a balance of high strength and stiffness with excellent environmental resistance and gap-filling capabilities. While other Plexus products are often methacrylate-based (MMA), which also provide strong structural bonds, PU2105 stands out for its low exotherm, low odor, and specific compatibility with a broad range of materials including difficult-to-bond polyolefins when used with a proprietary surface treatment. MMA adhesives generally have higher elongation and impact resistance.