LOCTITE HY 4090 is a commercial-grade, two-component hybrid adhesive that bridges the gap between instant cyanoacrylate speed and robust epoxy strength. Engineered for tough industrial environments, this high-viscosity, thixotropic gel provides exceptional impact, vibration, and shock resistance on rough or poorly fitting surfaces. Whether you are managing automated assembly lines or heavy-duty maintenance, LOCTITE 4090 delivers reliable, long-term structural integrity across dissimilar substrates. As a leading industrial supplier, we maintain this high-demand hybrid adhesive in stock for commercial accounts. Secure competitive tier rates and immediate dispatch by partnering with us for your volume requirements. Key Benefits & Industrial Applications Multi-Substrate Versatility: High-strength bonding across metals, composite materials, advanced composites, plastics, rubbers, wood, and elastomers. Advanced Gap Filling: Thixotropic gel formulation allows for precision application on vertical surfaces and accommodates gaps up to 5mm. Environmental Resilience: High moisture and UV resistance ensure stable performance in harsh outdoor or high-humidity manufacturing environments. Medical Device Compatibility: Tested to Henkel's test protocols based on ISO 10993 biocompatibility standards to assist in medical device component selection. Technical Specifications Shear Strength (Grit Blasted Steel): 2420 psi (Tested according to ISO 4587) Temperature Range: 22°F to 302°F (-30°C to 150°C) Viscosity: 120 mPa·s (cP) Brookfield Fixture Time: 90 - 180 seconds (Handling strength achieved rapidly; full cure over time) Color: Off-White to Light Yellow gel Curing Type: Room temperature cure after mixing Part A and Part B Directions for Industrial Use Surface Preparation: Ensure all bond areas are clean, dry, and free from grease or contaminants. Clean all surfaces using an approved [Link to: Loctite Cleaning Solvent]. Cartridge Setup (50g): Stand the dual cartridge upright for 1 minute. Insert into a compatible manual dispenser, remove the cap, and expel a small amount of adhesive to ensure even flow from both sides before attaching the mixing nozzle. Cartridge Setup (400g): Stand upright for 1 minute. Remove the cap and locking ring, attach the mixing nozzle, and secure it. Load into a pneumatic application gun (maximum dispense pressure of 2 bar / 30 psi) at a 45° angle with the tip pointing upward until product reaches the tip. Dispensing: Dispense and discard a bead equivalent to the length and width of the mixing nozzle to guarantee a homogenous mix before structural application. Assemble parts immediately after adhesive application. Frequently Asked Questions What is the gap-filling capability of LOCTITE HY 4090? LOCTITE HY 4090 is engineered with a high-viscosity, thixotropic gel consistency that allows it to effectively fill gaps up to 5mm on rough, uneven, or poorly fitting surfaces without sagging or running. Can LOCTITE 4090 be used for medical device manufacturing? Yes. LOCTITE HY 4090 has been tested to Henkel's rigorous internal protocols based on ISO 10993 biocompatibility standards, making it suitable for material selection within the medical device industry. Certificates of Compliance are available upon request. What accessories are required to dispense LOCTITE HY 4090 dual cartridges? For optimal mixing and application, it is recommended to use official Henkel accessories. The 50ml cartridge requires a standard manual application gun and a [Link to: LOCTITE 50ml Adhesive Mixing Nozzle] (Item 1826921). The 400g dual cartridge requires a pneumatic application gun calibrated to a maximum of 2 bar (30 psi) along with a LOCTITE 400ml Adhesive Mixing Nozzle (Item 1573135). Is LOCTITE HY 4090 recommended for pure oxygen systems? No. This product is not recommended for use in pure oxygen and/or oxygen-rich systems, and it should not be selected as a sealant for chlorine, strong oxidizing materials, or strong aqueous washes that may impact cure performance. Wholesale Bulk Pricing Looking to optimize your assembly line with commercial-grade adhesives? We offer wholesale pricing and flexible bulk supply agreements for procurement managers and tier-1 contractors. Contact Us today to request a formal bulk quote, verify real-time inventory levels/