Finding the best fiberglass hardener suitable for your needs isnt easy. With hundreds of choices can distract you. Knowing whats bad and whats good can be something of a minefield. In this article, weve done the hard work for you.
Best fiberglass hardener
1. Bondo 3004.7849 Fiberglass Resin Designed for Interior and Exterior Home Use, 100% Waterproof, Strong, Durable, 1 Gallon
Feature
Bondo All-Purpose Fiberglass Resin is 100% waterproofFor interior and exterior repairs
Product cures in 2 hours, resulting in a non-shrinking and durable repair
Compatible with all paints and gel coats and includes Bondo Fiberglass Resin Liquid Hardener
Designed for tub, shower, sink, pool, hot tub, boat repair, and more
Use for small to very large repairs to any fiberglass, metal, wood or masonry surface.
1 Gallon Can
Description
Bondo All-Purpose Fiberglass Resin is 100% waterproof and designed specifically to be used with Bondo Fiberglass Resin for interior and exterior repairs. If additional structural strength is needed for more severe repairs like larger holes, cracks or damaged surfaces, the use of additional layers of Bondo Fiberglass Cloth or Mat. The product cures in 2 hours, resulting in a non-shrinking and durable repair. Bondo All-Purpose Fiberglass Resin can be used on multiple surfaces including concrete, wood, fiberglass, metal and more, and can also be used as a waterproof sealer. It is also compatible with all paints and gel coats and includes Bondo Fiberglass Resin Liquid Hardener.2. Fiberglass Evercoat Liquid Hardener
Feature
Evercoat100603
Spackling & Fillers
Description
Liquid Hardener - 40 cc--Hardening agent for use with all polyester resins and Gel Kote. Plastic squeeze tube has graduated measure for convenient mixing.3. Bondo(R) Fiberglass Resin Liquid Hardener, 20126, 0.74 fl oz, 6 per case You are purchasing the Min order quantity which is 6 TUBE
Feature
Unit of Measure = TubesDescription
Bondo(R) Fiberglass Resin Liquid Hardener for use with Bondo(R) Fiberglass Resin. Used as part of a 2-part system for extremely strong and waterproof repairs4. Bondo Fiberglass Resin Repair Kit, 00420, 0.45 Pint
Feature
Bondo Fiberglass Repair Kit 420 has everything needed for the Do-It-YourselferIncludes easy how-to directions, fiberglass resin, and liquid hardener
Includes other necessary items like plastic spreader, fiberglass cloth, mixing stick and mixing tray
Non-shrinking polyester resin bonds to metals and plastics
Kit includes all materials for easy application
Hardens quickly for fast repairs
Includes directions for easy, trouble-free use
Do-it-yourself auto body repair at a fraction of the time and cost
Description
Bondo Fiberglass Repair Kit 420 has everything needed for the Do-It-Yourselfer, including easy how-to directions, fiberglass resin, liquid hardener, plastic spreader, fiberglass cloth, mixing stick and mixing tray.5. Bondo 3004.7858 201224-4PK All Purpose Fiberglass Resin, 28.8 Fluid Ounces
Feature
Bondo All-Purpose Fiberglass Resin is 100% waterproofFor interior and exterior repairs
Product cures in 2 hours, resulting in a non-shrinking and durable repair
Compatible with all paints and gel coats and includes Bondo Fiberglass Resin Liquid Hardener
Use for small to very large repairs to any fiberglass, metal, wood or masonry surface.
1 Quart Can
Description
Bondo All-Purpose Fiberglass Resin is 100% waterproof and designed specifically to be used with Bondo Fiberglass Resin for interior and exterior repairs. If additional structural strength is needed for more severe repairs like larger holes, cracks or damaged surfaces, the use of additional layers of Bondo Fiberglass Cloth or Mat. The product cures in 2 hours, resulting in a non-shrinking and durable repair. Bondo All-Purpose Fiberglass Resin can be used on multiple surfaces including concrete, wood, fiberglass, metal and more, and can also be used as a waterproof sealer. It is also compatible with all paints and gel coats and includes Bondo Fiberglass Resin Liquid Hardener.6. Bondo Fiberglass Resin, 00402, 0.9 Quart
Feature
Can be used alone or with fiberglass tape, cloth or matCan also be used as a sealer on damaged and rotted wood
Great on large or small metal rust-outs
Creates a strong and long lasting bond
Description
QT, fiberglass resin with hardener, includes how to directions.7. Bondo 928 Red Cream Hardener - 2.75 oz.
Feature
Assures freshness and maximum performanceDescription
Bondo Red Cream Hardener is designed to be used with Bondo Body Fillers, Bondo-Glass Bondo-Hair and Fiberglass Resin Jelly. Formulated and packaged under temperature-controlled conditions which assures freshness and maximum performance.8. TotalBoat 5:1 Epoxy Kit (Gallon, Slow Hardener)
Feature
Convenient kits include enough traditional 5:1 marine epoxy resin and hardener to complete a variety of boatbuilding and epoxy repair projects. Easy to apply by brush, roller, syringe, spreader, or by pouring onto wood, fiberglass, reinforcement fabrics, etched aluminum, bare steel, and lead.Self-leveling properties are ideal for coating and laminating. Viscosity is favored for wetting out fiberglass cloth and other reinforcement fabrics easily. When combined with fillers, it makes a strong fairing compound, filleting material, or adhesive.
Pot life ranges from 12 minutes @ 75F for Fast Hardener, to 20 minutes @ 75F for Slow Hardener. Cures to a high-strength, moisture-resistant, light amber plastic solid that can be sanded and shaped easily, once cured. Not suitable for clear-coating applications.
Includes metered resin and hardener pumps that provide the exact 5 parts resin to 1 part hardener ratio for a proper cure every time. Easy-to-use pumps are calibrated , so all you have to do is mix ONE full pump of hardener to every ONE full pump of resin. Compatible with all 5:1 marine epoxy resin systems.
Kits are available in quart, gallon, and 5.45-gallon sizes, with your choice of TotalBoat 5:1 Fast or Slow Hardener. Kit comes with resin & hardener pumps, gloves, mixing sticks, and plastic mixing cups.
Description
TotalBoat 5:1 Epoxy Kits contain the traditional 5:1 marine epoxy resin and hardener valued for its high strength and moisture resistance perfect for completing a variety of boat building projects and boat repairs, whether for wood or fiberglass boats. Kits contain TotalBoat traditional 5:1 Epoxy Resin (compare to West System 105), your choice of TotalBoat 5:1 Fast or Slow Hardener (compare to West System 205 and 206 hardeners), and calibrated 5:1 measuring pumps. The 5:1 epoxy resin and hardener pumps are designed to reduce waste in addition to ensuring you get the exact ratio and a perfect cure every time. Choose TotalBoat 5:1 Fast Hardener to achieve a proper cure while working in cooler temperatures (50-85F). At 75F, pot life is 12 minutes. Slow Hardener is best when working in warmer temperatures (70-95 degrees), or if you want to extend working times and cure times. At 75F, pot life is 20 minutes. For dispensing product via pumps, the recommended temperature is 60-70F.TotalBoat 5:1 marine epoxy resin can be applied to fiberglass, reinforcement fabrics, wood, etched aluminum, and bare steel. To make a strong adhesive, filleting material, or fairing compound, combine the resin with TotalBoat fillers and thickening agents.
Available in 3 sizes: quart, gallon, and 4-gallon kits. Quart kit includes 30 fl. oz. of epoxy and 6 fl. oz. of hardener. Gallon kit includes 127 fl. oz. of resin with 25 fl.oz. oz of hardener. 4-gallon kits include 4.5 gallons of epoxy and 1 gallon of hardener. Product can be applied by brush, roller, or syringe. It can also be poured and spread using a plastic resin spreader. 5:1 Epoxy Resin Kits can save you time and money on projects ranging from wet layups and laminating, to installing bulkheads. All TotalBoat products are developed by boaters, for boaters. We know what works and what doesn't.
9. 3M 00272 Bondo Glass Reinforced Filler - Quart,White,2.56 pounds
Feature
Fiberglass strands and fibers make it twice as strong as regular body fillerCovers small (up to 1/2") holes without the need for backing strips, fiberglass resin or cloth
Excellent as a foundation for hole, dent and rust-out repair
Can be paired with body filler and glaze for complete repairs
Use during the Fill stage of the 3M Body Repair System
Description
Bondo Glass Reinforced Filler provides fiberglass-quality repair of small holes and rust-outs (up to 1/2") without the need for backing strips, fiberglass mat or fiberglass resin. This reinforced body filler contains short, interlocking fiberglass strands, making it twice as strong as standard body filler and much easier to use during vertical repairs. If your repair needs even more strength, it also works well with traditional fiberglass repair materials and tools.10. Fibreglass Evercoat 359 Cream Hardener - Blue - 4 oz. Keg
Feature
Quick hardening, non-separating, cream hardeners formulated for use with body fillersAlso used with specialty fillers and polyester finishing putties
