Primary recommendation
AG860 Automotive Windshield PU Adhesive
One-part polyurethane adhesive for replacement windshields, fixed side glass and commercial-vehicle cab glass.
Sealant Application Guide
Automotive Glass Adhesive & Gasket Sealant
Automotive glass bonding and engine gasket sealing are different jobs and require different products. AG860 is Vesta's polyurethane adhesive for replacement windshields, fixed side glass and cab glass. RTV880 is Vesta's silicone gasket maker for compatible engine, water-pump, thermostat and transmission-cover sealing. Match each product to the exact vehicle, materials, service conditions and installation procedure.
Recommended Vesta products
Start with the product matched to the joint exposure, then confirm substrate compatibility and project requirements.
Alternative for specific conditions
RTV880 Silicone Gasket Maker
RTV silicone gasket maker for compatible engine, water-pump, thermostat and transmission-cover assemblies.
Where this application fits
Use the scene first to identify the joint, then check the substrate, exposure and movement below.
Windshield and vehicle-glass bonding
Replacement windshield, fixed side-glass and cab-glass work completed to the vehicle-specific procedure.
Engine and cover gasket sealing
Formed-in-place gasket sealing for compatible engine and transmission cover assemblies.
Commercial vehicle & machinery cab glass
Truck, bus and construction-machinery cab glazing matched to the actual glass, frame, primer and installation procedure.
- Replacement windshield bonding
- Automotive side-glass bonding
- Commercial-vehicle and machinery cab glass
- Oil-pan and valve-cover gasket sealing
- Timing-cover, water-pump and thermostat-housing sealing
- Compatible transmission-cover sealing
Common substrates
- Automotive glass and compatible ceramic frit
- Prepared vehicle body pinchweld and approved primers
- Compatible engine and transmission metals
- Factory sealant residues after approved removal and preparation
- Vehicle-specific adjacent materials after compatibility review
Key performance requirements
- Vehicle and glass-bonding procedure identified
- Primer and surface preparation matched to the actual materials
- Safe-drive-away time and cure conditions taken from the product instructions
- Gasket-sealant compatibility matched to temperature, fluid and flange conditions
- ADAS calibration and vehicle-manufacturer requirements followed where applicable
Product selection guidance
Choose by service condition
Use AG860 only for an approved automotive-glass bonding procedure that confirms the vehicle, glass, pinchweld condition, primers, cure conditions and required safe-drive-away time. Use RTV880 only where a formed-in-place silicone gasket is compatible with the flange design, service temperature, fluids and assembly procedure. The two products are not interchangeable.
Before Application
Application considerations
- Identify the exact vehicle, glass position or gasketed assembly before selecting a product.
- Follow the current vehicle or component manufacturer procedure for removal, preparation, primer and installation.
- Confirm cure conditions and safe-drive-away requirements before releasing a vehicle.
- Follow applicable ADAS calibration requirements after windshield replacement.
- For RTV gasket sealing, confirm flange condition, bead placement, assembly time, fluids and service temperature.
Common Questions
Frequently asked questions
Can AG860 and RTV880 be used for the same automotive repair?
No. AG860 is an automotive-glass bonding adhesive. RTV880 is a formed-in-place gasket sealant for compatible mechanical assemblies. Use the product specified for the actual job.
What determines the safe-drive-away time after windshield bonding?
Safe-drive-away time depends on the AG860 instructions, vehicle, glass, bead geometry, temperature, humidity, airbags and installation procedure. Do not use a universal time taken only from packaging artwork.
Does windshield replacement require ADAS calibration?
Follow the vehicle manufacturer and applicable service procedure. Vehicles with camera or sensor systems may require inspection, calibration or other documented steps after glass replacement.
Where can RTV880 be used?
RTV880 is designed for compatible oil-pan, valve-cover, timing-cover, water-pump, thermostat-housing and transmission-cover assemblies. Match it to the flange, fluids, service temperature and assembly procedure before use.
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