Polyurethane (PU) sealant is a versatile adhesive and sealing substance noted for its durability. Its appeal spans across multiple industries, but it is especially useful in the automotive sector.
In this article, we'll go over what PU sealant is, its primary benefits, popular automotive applications, and a step-by-step application procedure.
What is PU Sealant?
PU sealant is a polyurethane-based glue. Its flexibility, toughness, and weather resistance make it popular for bonding and sealing surfaces. Unlike silicone sealants, PU sealants may be painted and have better adherence to metal, glass, and plastic, all of which are typical materials used in cars.
Types of PU Sealants:
1. One-Component PU Sealants: One-Component PU Sealants, such as our Korapur 125, are easy to apply and cure when exposed to moisture in the air.
2. Two-Component PU Sealants: Two-Component PU Sealants, such as our Korapur 666/90, Offer faster curing times and are ideal for larger-scale projects.
Benefits of PU Sealant in Automotive Use
PU sealant’s unique properties make it an essential material in vehicle maintenance and manufacturing:
1. Durability: Withstand harsh weather conditions, UV rays, and high dynamic stress.
2. Flexibility: Adheres to multiple surfaces and accommodates movements caused by vibrations due to its high elasticity.
3. Waterproofing: Creates watertight seals, preventing leaks that could lead to corrosion.
4. Noise and Vibration Dampening: Reduces noise from panel vibrations for a quieter ride.
5. Corrosion Resistance: Protects against rust by sealing exposed joints and seams.
6. Weight Reduction: Reducing mechanical fixings makes the vehicle lightweight.
These qualities make PU sealant indispensable in maintaining vehicle integrity and performance.
Common Automotive Applications of PU Sealant
PU sealant is utilised in a variety of automotive scenarios:
1. Glass Installation: Ensures a secure, watertight bond between the windshield and vehicle frame.
2. Sealing Body Joints: Protects seams and joints from water and dirt ingress, preventing rust and enhancing structural stability.
3. Panel Noise Reduction: Applied to door panels, hoods, and other parts to minimise vibrations and noise.
4. Custom Modifications: Ideal for securing parts like wind deflectors, GRP body kits, and aluminium capping’s.
How to Apply PU Sealant: A Step-by-Step Guide
Follow these steps to apply PU sealant effectively:
Preparation
• Gather tools: PU sealant, caulking gun, masking tape, gloves, and a cleaning agent.
• Abrade the surface to improve adhesion by redistributing surface molecules.
• Clean the surface thoroughly with Korasolv to remove dirt, grease, or old adhesive. Ensure it’s dry for optimal adhesion.
Application Process
1. Prepare the Sealant: Cut the nozzle to the desired size and attach it to the cartridge. Load the cartridge into the caulking gun.
2. Apply the Sealant: Hold the gun at a 45-degree angle and apply an even bead along the seam or surface. Avoid breaks or gaps.
3. Tool the Sealant: Use a shaping tool or gloved finger to smooth the sealant for a professional finish.
4. Curing: Allow the sealant to cure as per the manufacturer’s instructions. Avoid disturbing the area during this time. A one-part sealant requires 24 hours to cure, while two-part sealants offer faster curing times, making them suitable for high-production environments.
Safety Tips
• Always work in a well-ventilated area due to the fumes.
• Wear protective gloves and avoid direct contact with the skin.
• Keep the sealant away from heat sources during application.
• These adhesive requires training in the safe handling of diisocyanates prior to use.
Maintenance and Longevity Tips
To ensure your PU sealant maintains its effectiveness:
• Inspect the sealed area regularly for signs of wear or cracking.
• Clean and remove dirt from the sealed joints to prevent degradation.
• Reapply sealant if necessary, following the same preparation and application steps.
Conclusion: Acquire PU Sealant for your Commercial Vehicle
PU sealant is a reliable and versatile material that plays a crucial role in commercial vehicle maintenance. Its durability, flexibility, and waterproofing properties make it indispensable for tasks like windshield installation, body joint sealing, and noise dampening. By following the proper application process and maintaining the seal, you can enhance the longevity and performance of your commercial vehicle.
Investing in high-quality PU sealant and applying it correctly will yield professional results. You can explore Albert Jagger’s wide range of Polyurethane (PU) Sealants here.
There is a wide range of products available, ensure you select the right product for the right application and environment.
To make an enquiry, or if you have any other questions on PU Sealant, you can contact Albert Jagger directly through our contact form, reach out through email: [email protected] or via telephone: +44(0) 1922 471000.