Supex 25 PU Sealant

Supex PU 25: High-Performance Polyurethane Sealant

Supex PU 25 is a premium polyurethane sealant and adhesive. It delivers strong bonding and sealing in construction, industrial, and automotive work. This advanced polyurethane sealant offers excellent adhesion, flexibility, and weather resistance for indoor and outdoor use.

Many sealants crack or fail in tough conditions. However, Supex PU 25 solves these problems. Its reliable formula creates lasting seals. It resists vibration and performs well on various surfaces—cutting rework and costs.

Best Polyurethane Sealant in India – Key Features

• Single-component, moisture-curing for simple application.
• High bond strength with great gap-filling power.
• Stays permanently flexible under movement and stress.
• Resists water, UV, chemicals, and harsh weather.
• Bonds firmly to wood, concrete, metal, plastic, and glass.
• Paintable and sandable after curing.
• Non-sag formula works on vertical or overhead joints.
• Dampens vibration and sound effectively.

Applications of This Polyurethane Sealant

Sealing Uses:

• Joints in prefab buildings.
• Rainwater pipes, gutters, and HVAC ducts.
• Expansion joints in concrete and masonry.
• Precast structures, tunnels, bridges, and infrastructure.

Bonding Uses:

• Automotive assembly for buses, trucks, and containers.
• Sheet metal work with vibration control.
• HVAC system installation and repairs.
• Joining dissimilar materials like metal, glass, and plastic.

This polyurethane sealant also excels in basement waterproofing, window/door installs, and pool sealing. It suits large projects and small repairs alike.

Advantages of Supex PU 25 Polyurethane Sealant

• Provides durable, flexible bonds with high tear resistance.
• Handles extreme temperatures reliably.
• Recovers well after stretching or compression.
• Costs less than many MS polymer options.
• Available in colors and overpaintable.
• Cures quickly to reduce downtime.

Technical Overview

Supex PU 25 polyurethane sealant cures with air moisture. It forms a tough, elastic seal on porous or non-porous surfaces. Built for demanding standards, it protects against movement, moisture, and environmental stress long-term.

Professionals trust this Pu sealant for versatility and strength. Choose Supex PU 25 for reliable results every time.

Kindly find the youtube video links for Supex PU 25.
Elevator Door bonding :  https://youtu.be/wFBN-_ntX-I?si=-cfjseDYnJ4SkRtb

Expansion joint sealing: https://youtu.be/0sPFntCCQ38?si=R11JTquIuJLPH70s

Why Choose Supex PU 25 Polyurethane Sealant Over Others?

Choose Supex PU 25 when you need a tough, paintable, cost-effective sealant that excels in adhesion, flexibility under stress, vibration resistance, and long-term durability in joints, expansion gaps, automotive bonding, or outdoor construction — outperforming silicone in strength/paintability and MS polymer in cost/structural reliability for demanding Indian applications. For extreme UV-only or ultra-low VOC needs, silicone or MS might edge out, but PU 25 covers most real-world scenarios effectively. Enquire for samples!

FAQ Section

1. What is polyurethane sealant used for?

Sealing expansion joints, concrete/masonry gaps, prefab buildings, rainwater pipes, gutters, HVAC ducts. Bonding in automotive (bus/truck floors, panels, FRP, roofs), metal/wood/glass joins, vibration control. Ideal for construction, infrastructure, elevators.

2. Is Supex PU 25 paintable?

Yes, Supex PU 25 is fully paintable and sandable after curing

3. Difference between PU sealant and silicone sealant?

PU sealant offers superior mechanical strength, tear resistance, paintability, and adhesion to porous/dissimilar materials (concrete, wood, metal). It excels in high-movement joints and structural bonding. Silicone provides better UV/heat resistance and mold resistance but is usually non-paintable and weaker in tensile strength/abrasion. PU suits construction & automotive; silicone for glazing & wet areas.

4. How long does polyurethane sealant last?

Polyurethane sealant like Supex PU 25 typically lasts 10–20 years in well-designed joints with proper application, surface prep, and moderate exposure. High-quality PU offers durable elasticity and weather resistance for construction/automotive uses, though lifespan shortens (5–10 years) under extreme UV, moisture, or movement stress. Regular inspection extends performance.

5. Can polyurethane sealant be used on wet surfaces?

No, standard polyurethane sealants like Supex PU 25 should not be applied on wet surfaces.