DUPONT BETASEAL™ U-428+ HV is a professional-grade, high-viscosity polyurethane adhesive designed for windshields, back glass, quarter glass, and other direct-glazed stationary automotive glass installations. Its primerless-to-glass formula incorporates glass primer into the urethane, helping streamline installation while providing a strong, dependable bond.
This listing includes 10 tubes, making it ideal for professional installers or multiple vehicle installations.
Important: A high-thrust, heavy-duty caulking gun is required. A 26:1 ratio caulking gun is recommended.
Features & Benefits
- Professional-grade polyurethane auto glass adhesive
- Primerless adhesion to glass
- One-component, conventional-cure formula
- High-viscosity formula for improved decking and sag resistance
- Suitable for windshields, backlites, quarter glass, and other stationary automotive glass
- Can be used for backfilling reveal moldings or trim
- Moisture-curing formula activated by temperature, humidity, and time
- Black urethane adhesive for direct glazing and structural bonding applications
Package Includes
10 × BETASEAL™ U-428+ HV Adhesive Tubes
Most windshield or back-glass installations require approximately 2 tubes; actual usage varies by vehicle.
Application
- Clean all bonding surfaces and remove grease, dust, oil, moisture, and loose material.
- Apply a continuous triangular bead using a high-thrust, professional caulking gun.
- Install the glass within the product’s open time and follow the recommended safe drive-away time for the specific installation conditions.
- Use BETAPRIME™ 5504G primer on exposed bare metal, pinchweld areas, and plastic-encapsulated parts as required for safe adhesion.
Helpful Tips
- This is a high-viscosity (thick) professional adhesive.
- A 26:1 ratio, heavy-duty, or battery-powered caulking gun is recommended.
- If using a standard caulking gun, gently warming the cartridge with a hair dryer for approximately 15 minutes may improve flow.
- Store at room temperature for easier application.
- Do not allow cartridges to freeze or become excessively cold.
- The urethane cures from the outside toward the center as moisture from the air diffuses into the adhesive. Higher temperatures and humidity generally reduce cure time.
Important
Designed for professional automotive glass replacement and stationary glass bonding. Always follow the product label, technical data sheet, vehicle manufacturer’s installation procedures, and safety recommendations to ensure a safe, secure installation.
At National Auto Glass Direct, we are committed to getting your order to you quickly, safely, and reliably.
Processing Time
All orders are processed and shipped within 1 business day after purchase. Orders are fulfilled Monday through Friday, excluding major holidays.
Shipping Time
We offer free standard shipping (1 to 5 business days) on all orders within the contiguous United States.
Delivery times may vary depending on your location, as we ship from California. Customers closer to our warehouse may receive orders faster, while more distant locations may take the full 5 business days.
Most shipments are handled through FedEx Ground.
Shipping Coverage
We currently ship to the contiguous United States only.
We do not ship to:
- Alaska
- Hawaii
- Puerto Rico
- Guam
- U.S. Virgin Islands
- U.S. territories or international locations
At National Auto Glass Direct, we want you to feel confident ordering the correct auto glass for your vehicle. If something isn’t right, we’re here to help resolve it quickly and fairly.
60-Day Free Returns on Eligible Items
We offer a 60-day return policy with free returns on eligible items.
To qualify for a return, your item must be:
- New/Unused
- Not attempted to be installed
- Returned in original condition
- Returned in original packaging
Items that do not meet these requirements may not be eligible for return.
Important Inspection Notice (Before Installation)
Please inspect your glass immediately upon delivery to ensure it arrived safely and was not damaged in transit. If any issues are found, contact us right away so we can assist you promptly.
We strongly recommend inspecting all items before installation, as installed or attempted-installation items are not eligible for return or refund under any circumstances.
Non-Returnable / Partial Refund Situations
In certain cases, only partial refunds may be granted. This may include:
- Items not in original condition due to reasons not caused by our error
- Items that are damaged or missing parts not due to shipping or fulfillment issues
- Items returned more than 60 days after delivery
- Items returned without prior approval
Return & Refund Process
At National Auto Glass Direct, all returns must be requested and approved before sending any item back.
To start a return, please contact us at info@nationalautoglassdirect.net and include the following information:
- Order number
- Reason for return
- Photos (if applicable, especially for damage or incorrect item)
Once your return request is reviewed and approved, we will provide return instructions and the correct return address.
After approval, please securely package the item and ship it back using a trackable shipping method.
Once we receive and inspect the returned item, we will notify you of the approval status. If approved, your refund will be issued to your original payment method within a few business days, depending on your bank or payment provider.
Our Commitment
We carefully package all automotive glass using reinforced materials designed for safe transport. Our goal is to ensure you receive the correct part in excellent condition, and we work quickly to resolve any legitimate issues that may arise.
