Product Name
Permabond Urethane PT321 Super Fast Set 1 - 1.5 min 50ml Cartridge and Starter Kit
Brief Description
PERMABOND® PT321 is a 2-part, room temperature curing polyurethane adhesive. It is designed for industrial use and forms strong, resilient bonds to a wide variety of substrate materials, including metals, plastics, and composites. A key feature is its super-fast set time, with a pot life of 60-90 seconds (1-1.5 minutes), making it ideal for applications requiring rapid assembly.
Popular Applications & Uses
- Bonding carbon fiber components.- Automotive interiors, including leather and other materials where witness marks need to be minimized.- Structural bonding applications across various industries.- Bonding high-performance composites such as FRP, GRP, and epoxy.- General bonding of metals, plastics, and wood.- Potting and sealing.- Manufacturing of sports equipment.- Assembly of medical devices and prosthetics.- Architectural cladding applications.- Adhesives solutions for EV charging points.
Industries that Commonly Use It
- Aerospace/Defense- Automotive Service/Repair- Cabinet & Woodworking- Construction/ Building Services- Energy- Fabrication- General Manufacturing- Medical Device/ Prosthetics- Metal Fabrication- Plastic Fabrication- Transportation/ Specialty Vehicle (e.g., truck trailers, RVs, emergency vehicles, bus, railcar, container construction)
Special and Unique Features
- Super fast set time with a pot life of 60-90 seconds (1-1.5 minutes).- Cures at room temperature, eliminating the need for external heat sources for curing.- Easy 1:1 mix ratio for convenient application.- Thixotropic, non-slump rheology, preventing dripping or running, especially on vertical surfaces.- Provides good resistance to impact and vibration, enhancing durability of bonded assemblies.- Exhibits low shrinkage, making it suitable for bonding thin skins or laminates without show-through.- Black color, which is ideal for achieving virtually invisible bonds on black leather, carbon fiber, and rubber.- No primer is typically needed for adhesion to a wide variety of substrates.
Key Properties
- Chemical composition: Polyurethane (Part A), Isocyanate (Part B).- Appearance: Black (Part A), Cream (Part B).- Viscosity @ 25°C: Part A: 4000-8000 mPa.s (cP) Thixotropic; Part B: 3000-6000 mPa.s (cP) Thixotropic.- Pot life: 60-90 seconds (1-1.5 minutes).- Handling time (steel): 10-15 minutes.- Full cure: 24 hours @ 23°C; 30 minutes @ 90°C (accelerated cure).- Shear Strength (Steel): 18-25 MPa (2600-3600 psi).- Tensile Strength: 20-25 MPa (2900-3600 psi).- Hardness: 70-80 Shore D.- Elongation at break: <10%.- Maximum gap fill: 0.5 mm (0.2 in).- Service Temperature Range (cured adhesive): -40°C to +120°C (-40°F to 248°F).
Surface Compatibility
- Metals (e.g., steel, aluminum, zinc, other metal alloys).- Plastics.- Composites (e.g., carbon fiber, FRP, GRP, epoxy).- Wood, plywood, MDF.- Glass.- Leather.- Rubber.- Concrete and cement.- Phenolic materials.- Drywall/plasterboard.
Known backups / known substitutes
- Permabond PT326 (6-minute pot life) and Permabond PT328 (15-minute pot life) offer longer working times within the Permabond polyurethane range.- Other fast-set polyurethane construction adhesives such as Titebond Fast Set Polyurethane Construction Adhesive, Bostik Fast Set 1100 FS Urethane Adhesive, and SRW Rapid-Set Polyurethane Adhesive.- Single-component urethane adhesives like PB Fast Set HDU Adhesive, which cures in 30 minutes and works on wood, metal, and high-density urethane.- Two-component epoxy or methyl-methacrylate (MMA) structural adhesives, such as Sikafast 3511, Master Bond Supreme 11AOHT-LO, or Parker Lord 320/322 Epoxy Adhesive, may serve as alternatives for high-performance bonding.
Comparison Note
Permabond PT321 is distinguished by its exceptionally rapid set time of 1-1.5 minutes, making it a top choice for industrial applications demanding quick assembly and high production efficiency. Unlike many adhesives, it cures effectively at room temperature and offers a convenient 1:1 mix ratio, simplifying application. Its thixotropic, non-slump rheology is a significant advantage for vertical or overhead bonding, ensuring the adhesive stays in place. The product delivers a robust combination of high shear and tensile strength, coupled with excellent resistance to impact and vibration, providing durable and resilient bonds across a diverse range of materials without the need for a primer.
