Levico Polyurethane automotive windshield sealants (often referred to as direct glazing adhesives) are high-modulus, single-component, moisture-curing elastomers. They are specifically engineered to provide structural strength, handle intense vehicle vibrations, and meet Federal Motor Vehicle Safety Standards (FMVSS) for crash safety.
A comprehensive Technical Data Sheet (TDS) breakdown mapping out the properties, performance characteristics, and application guidelines typical of professional-grade automotive polyurethane windshield sealants is detailed below.
Polyurethane Automotive Windshield Sealant – Technical Details & Typical TDS
Automotive Windshield Polyurethane (PU) Sealant is a one-component, moisture-curing polyurethane adhesive specifically designed for bonding front, rear, and side automotive glass to vehicle bodies. It provides high structural strength, vibration resistance, and weatherproof sealing.
It is widely used in:
- Passenger cars
- Trucks
- Buses
- Rail vehicles
- Construction equipment
- Agricultural machinery
Typical Product Description
Product Type: One-component Moisture-Curing Polyurethane Adhesive
Appearance:
- Black paste
Features
- High initial green strength
- Excellent adhesion to automotive glass
- Excellent adhesion to painted metal
- Primerless adhesion on many substrates (depending on system)
- High tensile strength
- Excellent flexibility
- UV resistant (when protected by ceramic frit or trim)
- Waterproof
- Weather resistant
- Vibration resistant
- Solvent-free
- Low VOC
- Non-sag formulation
- Easy extrusion
Typical Technical Data Sheet (TDS)
| Property | Typical Value |
|---|---|
| Base Polymer | Polyurethane |
| Cure System | Moisture Cure |
| Colour | Black |
| Density | 1.20 ± 0.05 g/cm³ |
| Consistency | Non-sag Paste |
| Skin Formation Time | 20–40 min (23°C / 50% RH) |
| Tack Free Time | 40–60 min |
| Cure Rate | 3–4 mm / 24 hr |
| Shore A Hardness | 55–65 |
| Tensile Strength | ≥6 MPa |
| Elongation at Break | 400–600% |
| Modulus @100% | 1.5–2.5 MPa |
| Application Temperature | +5°C to +35°C |
| Service Temperature | -40°C to +90°C |
| Short-term Temperature Resistance | Up to 120°C |
| VOC | Very Low |
| Shelf Life | 9–12 Months |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 6–8 MPa |
| Elongation | 500% |
| Tear Strength | High |
| Shear Strength | Excellent |
| Impact Resistance | Excellent |
| Fatigue Resistance | Excellent |
Chemical Resistance
Excellent resistance to:
- Rainwater
- Humidity
- Engine oil splash
- Mild acids
- Mild alkalis
- Road salts
- Detergents
Adhesion
Excellent adhesion to:
✅ Automotive Glass
✅ Ceramic-coated Glass
✅ Painted Steel
✅ Aluminium
✅ Galvanized Steel
✅ Fiberglass
✅ Primered Metal
Typical Applications
Windshield Installation
Passenger vehicles
Bus Windshields
High-strength bonding
Truck Glass
Front and rear windshield installation
Railway
Glass bonding
Heavy Equipment
Cab glass installation
Advantages
- High structural bonding
- Excellent crash performance
- Good vibration absorption
- Excellent weather resistance
- Flexible after curing
- High durability
- OEM-grade performance
- Suitable for robotic application
- Excellent ageing resistance
Surface Preparation
Before application:
- Remove old adhesive.
- Clean the surface using an approved cleaner.
- Degrease the bonding area.
- Apply primer if required by the adhesive system.
- Apply the PU sealant in a continuous triangular bead.
- Install the windshield within the specified open time.
Typical Installation Process
Glass Cleaning
↓
Primer (if required)
↓
Apply PU Adhesive
↓
Install Glass
↓
Position Correctly
↓
Allow Initial Cure
↓
Safe Drive-Away Time
Typical Consumption
| Windshield Size | Approximate Usage |
|---|---|
| Small Car | 250–350 mL |
| Sedan | 350–450 mL |
| SUV | 400–500 mL |
| Bus | 600–1000 mL |
Storage
- Store between 10–25°C
- Keep unopened in original packaging
- Protect from moisture
- Avoid direct sunlight
- Store in a cool, dry place
Shelf Life
Typically 9–12 months in unopened packaging under recommended storage conditions.
Safety
- Wear gloves and eye protection.
- Use in a well-ventilated area.
- Avoid skin and eye contact.
- Refer to the product’s Safety Data Sheet (SDS) before use.