Duraglas Fiberglass Filled Filler 1 Gallon | U.S. Chemical & Plastics

Duraglas Fiberglass Filled Filler 1 Gallon — engineered for durable automotive and marine repairs

Duraglas is the original fiberglass reinforced body filler from U.S. Chemical & Plastics. It combines short-strand fiberglass fibers with a ready-to-use resin matrix to deliver a repair compound that stands up to rust-outs, holes, tears, and cracks on metal and fiberglass panels. The distinctive blue-green color you see in the package hints at a service-ready product designed for tough applications.

With Duraglas, you gain a versatile two-part system. The filler is reinforced for strength where corrosion has taken hold, and it remains workable long enough to shape with standard finishing putty. When sealed with the All-Metal top coat, the repair can resist moisture and maintain an even, waterproof surface across cured seams. This makes it a practical option for automotive body work, boat and marine repairs, and other projects where metal, fiberglass, or mixed substrates are involved.

Key benefits you may notice

• Fiberglass reinforcement adds strength and durability to rusted areas and panel repairs
• Rustproof and waterproof finish when paired with the All-Metal top coat
• Versatile across multiple substrates: metal, aluminum, fiberglass, wood, masonry, and concrete
• Two-part system with a 50:1 mix ratio by weight to supplied cream hardener
• Finishing Putty compatibility for a smooth final surface

For real-life use, Duraglas shines in scenarios like repairing rust holes on a body panel, sealing cracks in fiberglass, or bonding seams in automotive and marine applications. The product is designed to work with fiberglass cloth for larger repairs, helping you build up strength where it’s needed while maintaining a relatively lightweight profile. While results can vary based on surface condition and proper preparation, many shop technicians find that Duraglas helps them achieve firm, durable repairs with a clean finish.

How to use

• Prepare the surface: clean, dry, and roughen the area for better adhesion
• Mix: combine 50 parts filler to 1 part cream hardener by weight (2% overall)
• Apply: press Duraglas into the repair area; use fiberglass cloth for larger openings if needed
• Finish: smooth with finishing putty and seal with All-Metal top coat for waterproof protection