401 Fiberglass Resin, Polyester, 1 Pt.

Bondo Fiberglass Resin Model 401 is a strong polyester resin engineered for automotive, marine, and general repair work. This versatile material bonds to multiple surfaces including fiberglass, wood, metal, and masonry, making it ideal for patching rust-outs, rebuilding damaged areas, and creating lasting structural repairs on vehicles, boats, jet skis, and RVs. Whether used alone as a sealer or combined with fiberglass cloth and mat for reinforced repairs, this resin dries rapidly and hardens to a durable, waterproof finish that resists chemicals and solvents.

The 1-pint bottle is compact enough to store in any toolbox, and the material can be sanded smooth in less than two hours. Once cured, it accepts nearly any paint system, including gel coat and marine paints, allowing seamless finishing.

Features and Benefits

• Fast-Setting Formula: Dries quickly and can be sanded in under two hours, speeding up repair projects.
• Multi-Surface Bonding: Works on fiberglass, wood, metal, masonry, and other materials, creating a strong, long-lasting bond.
• Waterproof and Chemical-Resistant: Resists water damage, chemicals, and solvents for durable outdoor and marine applications.
• Flexible Application: Use alone as a wood or concrete sealer, or combine with fiberglass cloth and mat for reinforced structural repairs.
• Paint-Compatible: Accepts all paint systems, including gel coat and marine paints, for professional finishing options.
• Compact Size: Lightweight 1-pint bottle fits easily in toolboxes and storage spaces.

Specifications

• Brand: Bondo
• Model: 401
• Size: 1 Pint
• Type: Polyester Fiberglass Resin with Hardener
• Color: Liquid with pungent organic odor
• Applications: Automotive, marine, RV, fiberglass, wood, metal, and masonry repair

How to Use

Mix the resin with hardener and apply to the damaged area. Can be used alone as a sealer on wood or concrete, or combined with fiberglass cloth and mat for reinforced surface repairs. Sand smooth after drying.