Automotive Glass Sealant

We are a large sealant production factory in China

WhatsApp/WeChat: +86 15089434935

Email: mangrove88@126.com

Automotive glass sealant is a special adhesive designed for installing and sealing car glass. It is primarily used for bonding and waterproofing windshields, side windows, sunroofs, and other areas to ensure a secure and long-lasting seal between the glass and the vehicle body.

1. Key Functions & Features

• High-Strength Bonding: Withstands vibrations, impacts, and wind pressure during driving.
• Waterproof & Dustproof: Seals gaps between glass and car body to prevent moisture/dust ingress.
• Weather Resistance: Operates in -40°C to +90°C, UV-resistant.
• Elasticity: Absorbs stress between glass and body, preventing cracks.
• Fast Curing: Surface sets in 30 mins–2 hrs; full cure in 24–48 hrs (humidity-dependent).

2. Main Types

(1) Polyurethane (PU) Sealant

• Pros: Structural-grade strength, OEM-standard for windshields.
• Cons: Requires primer; sensitive to application conditions.

(2) RTV Silicone

• Pros: High heat resistance (up to 250°C), ideal for sunroofs.
• Cons: Lower bond strength than PU; secondary sealing use.

(3) Butyl Tape

• Pros: Pre-formed strips for quick installation/temporary fixes.
• Cons: Limited durability; often paired with other sealants.

3. Common Applications

• Windshield Installation: PU for structural integrity.
• Sunroof Sealing: Heat-resistant silicone.
• Side/Rear Windows: Balance adhesion and shock absorption.
• Repairs: Reapplication after old sealant removal.

4. Critical Application Notes

• Surface Prep: Clean glass/body interfaces thoroughly (remove grease, old residue).
• Environment: Ideal at 5°C–35°C, 40%–70% humidity.
• Curing: Avoid water exposure/vibration; no car wash during curing.
• Safety: Wear gloves/masks; PU may contain isocyanates (respiratory irritant).

5. Comparison with Other Adhesives

Additional Notes:

• OEM vs. Aftermarket: OEM often uses 2-component PU; aftermarket prefers 1-component.
• Certifications: Complies with ISO 10987, SAE J1151.

For brand recommendations or step-by-step guides, specify your scenario (e.g., DIY repair/professional installation).