Bostik® Boscodur® 4L Polyisocyanate Curative

Bostik® Boscodur® 4L is a polyisocyanate curative designed to enhance the performance of polyurethane and solvent-based adhesive systems. When used as a crosslinking agent, it improves bond strength, heat resistance, and chemical durability in demanding industrial applications.

• Polyisocyanate curative for crosslinking polyurethane and solvent-based adhesives
• Improves tensile strength, heat resistance, and chemical durability
• Enhances long-term adhesion and performance under demanding conditions
• Ideal for laminating, bonding, and industrial manufacturing processes
• Designed for controlled mixing ratios to ensure consistent results
• Compatible with a wide range of Bostik® adhesive technologies

Engineered as a performance-enhancing additive, Bostik® Boscodur® 4L Polyisocyanate Curative reacts with hydroxyl-functional adhesives to create a stronger, more resilient polymer network. This crosslinking action increases resistance to heat, humidity, solvents, and mechanical stress, making it well-suited for high-performance manufacturing environments. Commonly used in laminating, footwear assembly, engineered fabric bonding, and industrial product fabrication, Boscodur® 4L provides reliable and predictable curing characteristics when blended at appropriate ratios. Its low viscosity allows easy integration into adhesive systems, supporting efficient processing and consistent end-use performance.

Technical Specifications

• Brand: Bostik®
• Product Line: Boscodur®
• Chemistry: Polyisocyanate Curative
• Type: Crosslinking Agent for Adhesive Systems
• Function: Increases strength, heat resistance, and chemical durability
• Viscosity: Low-viscosity liquid for easy mixing
• Applications: Laminating, industrial bonding, polyurethane adhesive systems
• Packaging: Available in multiple container sizes