LORD 7545 A/B Fast Set 3-5 Minute Urethane Adhesive System - Thick Viscosity, Non-Sag with Configurable Set-Time & high strength for FRP, SMC, Plastics, primed metals, powder coating

Product Name

LORD 7545 A/B Fast Set 3-5 Minute Urethane Adhesive System - Thick Viscosity, Non-Sag with Configurable Set-Time & high strength for FRP, SMC, Plastics, primed metals, powder coating

Brief Description

LORD 7545 A/B is a two-component, fast-set urethane adhesive system known for its thick, non-sagging viscosity and high strength. It is designed for structural bonding of various substrates, including fiber-reinforced plastics (FRP), sheet molding compounds (SMC), other plastics, and primed metals. The system offers configurable set times to suit diverse process requirements.

Popular Applications & Uses

- Structural bonding applications- Assembly of composite panels and technical covers- Flexible structural bonding of aluminum and thermoplastic parts- Sealing of joints subject to vibration- Automotive interiors, including bonding plastics, synthetic leather, foam, and fabrics- Furniture production, joining wooden frames and laminated surfaces- Construction for joining structural elements like wall panels, roof or floor insulation, and installing windows and doors- Industrial panel lamination- Sign and display assembly, such as channel letters and cabinet light boxes- Service work trucks for sidewall, roof, panel bonding, HVAC units, and door closures

Industries that Commonly Use It

- Automotive Service/Repair- Construction/ Building Services- General Manufacturing- Metal Fabrication- Plastic Fabrication- Sign & Display- Transportation/ Specialty Vehicle (including aerospace, rail, and industrial vehicles)- Furniture- LED/Electronics (for electrical fabrication supplies and electronics assembly)- Cladding (for architectural cladding and wall panel hanging)

Special and Unique Features

- Configurable set times, allowing selection of hardener for desired working life- Non-sag, thick gel/paste consistency that remains in position on vertical or overhead surfaces- Non-flammable, exceeding U.S. DOT requirements- Environmentally friendly, not containing ozone-depleting chemicals- Excellent durability for structural applications- Can fill large gaps where mating surfaces are irregular- High flexibility and elongation, absorbing movement, shock, and vibration

Key Properties

- **Adhesive Type:** Two-component urethane adhesive system- **Viscosity:** Thick, non-flowable, non-sag gel/paste- **Mix Ratio:** 1:1 by volume- **Working Time:** 3-5 minutes (for A/B variant, other curatives offer different times)- **Handling Strength:** Achieves handling strength in approximately 30 minutes (for A/B variant)- **Full Cure:** Reaches full strength in 24 hours at 75°F (24°C), can be accelerated with heat- **Strength:** High strength, often exceeding substrate bond strengths- **Environmental Resistance:** Resists sunlight, weathering, humidity, and salt spray- **Chemical Resistance:** Solvent resistant when cured; painting and most cleaning processes do not affect bond strength- **Appearance:** Off-white color when cured (other colors like black are available)

Surface Compatibility

- FRP (Fiber-Reinforced Plastic)- SMC (Sheet Molding Compound)- Various plastics (including ABS, PC-ABS, PVC)- Primed metals- Powder coatings- Dissimilar substrates

Known backups / known substitutes

- **Other LORD 7545 Series:** LORD 7545 A/C, A/D, A/E, A/F, A/G offer different working times and handling times- **LORD 7542 Urethane Adhesive:** A similar urethane adhesive system from LORD- **Other Urethane Adhesives:** General polyurethane adhesives from various manufacturers- **Epoxy Adhesives:** While generally stiffer, epoxies can be used for applications requiring high mechanical resistance- **Acrylic Adhesives:** May be considered where flexibility and dynamic strength are required

Comparison Note

LORD 7545 A/B, as a urethane adhesive, offers superior flexibility and resistance to vibration compared to stiffer epoxy adhesives, making it ideal for assemblies subject to movement, impact, and thermal expansion. It provides excellent adhesion across a wide range of materials, including dissimilar substrates, and maintains strong bonds in demanding environments due to its resistance to moisture, chemicals, and weathering.