3M Bondo Fiberglass Resin 00404 - 0.9 Gallon Can for Auto & Boat Repairs

Overview

The 3M Bondo Fiberglass Resin 00404 is a high‑strength polyester resin designed for durable auto and boat repairs and for joining surfaces where strength and water resistance matter. Packaged in a 0.9 gallon can, it provides ample material for larger fixes and textured applications. When cured, it sands smooth and accepts nearly any paint system, making it a flexible option for prep work and finish coats.

Whether you are patching rust outs, recreating a seam, or sealing wood and concrete, the resin offers a capable option for creating a solid, weather‑ready surface. It bonds to fiberglass, wood, metal, and masonry, and it can be used with Bondo Fiberglass Cloth or Mat for reinforced repairs. One can often cover multiple project areas, helping you streamline repairs without swapping products.

• Creates long lasting bonds for auto and boat restoration and repair projects
• 100 percent waterproof repairs on fiberglass, metal, and more
• Sands in less than 2 hours for faster progress
• Use with Bondo Fiberglass Cloth or Mat for stronger repairs
• Includes Bondo Fiberglass Resin Liquid Hardener for convenient, accurate mixing

Versatile applications you can imagine

In addition to repairing damaged surfaces, this resin can seal wood or concrete and accepts nearly any paint system. It is suitable for both planned rebuilds and on site fixes, offering durability after proper curing. The resin is ideal for multi substrate projects where a uniform bond is helpful and where water resistance matters in the finished surface.

• Substrates: fiberglass, wood, metal, and masonry
• Finish and paint compatibility: accepts most paint systems
• Usage scenarios: auto, boat, workshop, and home projects

Usage tips and expectations

Prepare surfaces by cleaning and roughening as needed. Mix the resin with the included liquid hardener according to the directions. Apply in layers if required, then permit curing before sanding or painting. With proper technique, the result can be sanded and finished to blend with the surrounding material.

Specifications at a glance

Volume: 0.9 gallon can. Compatibility: works with common fiberglass cloth or mat for reinforced repairs. Key benefit is waterproof bonding, and the resin accepts a wide range of paints for a seamless finish after cure.