Permatex Glass Weld urethane windshield sealant 10.5 oz — fast‑curing, FMVSS 212 tested, flexible bond

Permatex Glass Weld 81100 is a premium urethane adhesive formulated to fast‑cure and securely bond windshields and stationary automotive glass for long‑lasting, flexible seals. Permatex Glass Weld is engineered for professional and DIY automotive glass installation and repair. It combines high initial grab, environmental durability, and proven safety performance (FMVSS 212 tested) to create a resilient joint between glass and vehicle body that resists vibration, weather, and temperature swings. Packaged in a 10.5 oz cartridge, this polyurethane seam sealer works with standard caulking guns and pairs well with windshield removal and installation tool kits.

How quickly will this urethane cure and let me return the vehicle to service?

Glass Weld is formulated for fast initial cure so that vehicle downtime is minimized. Depending on bead size, temperature and humidity, users can expect tack‑free set and handling strength in under two hours, with full cure developing over the following day.

• Less than 2 hours to initial cure under typical shop conditions
• Suitable for quick replacement workflows and mobile services
• Cures to a firm, flexible bead that supports glass handling

What safety and performance standards does it meet for windshield installation?

Permatex Glass Weld has been evaluated to meet Federal Motor Vehicle Safety Standard FMVSS 212 for windshield mounting, which addresses strength during crash and rollover events. The formulation maintains bond integrity across a range of operating temperatures and road conditions without becoming brittle.

• FMVSS 212 tested to support proper windshield retention
• Designed for permanent adhesion between glass and vehicle frame
• Resists weathering, UV exposure and automotive vibration

How does the adhesive perform in different weather and driving conditions?

This polyurethane sealant stays flexible after curing so it accommodates thermal expansion and structural movement. Its environmental resistance helps prevent bond degradation from moisture, road chemicals and UV exposure, extending the life of the windshield installation.

• Flexible bond tolerates temperature cycling and impacts
• Formulated to resist water intrusion and salt or chemical exposure
• Maintains adhesion across hot summers and cold winters

What applications and tools pair well with Permatex Glass Weld?

Glass Weld is intended for windshield and fixed automotive glass installation, and it serves as an effective seam sealer in many bodyshop tasks. It dispenses from a standard 10.5 oz cartridge and works particularly well with windshield removal and installation kits, including Permatex accessory kits.

• Use with a standard caulking gun for controlled bead application
• Compatible with windshield removal tools and replacement kits
• Ideal for both professional shops and DIY glass replacement projects

Who is this for? Permatex Glass Weld 81100 is aimed at professional auto glass technicians, collision repair shops, and informed DIYers who need a reliable, fast‑curing urethane for windshield and stationary glass bonding. If you require an FMVSS 212‑tested product that balances strong adhesion with flexibility and quick turnaround, this sealant is formulated to meet those needs while integrating into common automotive glass installation workflows.

FAQ

Q: Is Permatex Glass Weld FMVSS 212 compliant?

A: Yes. Glass Weld has been tested to meet FMVSS 212 standards for windshield mounting strength.

Q: How long until the adhesive is safe to drive on?

A: Initial cure typically occurs in under two hours; full cure develops over 24 hours depending on conditions.