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3M

Bondo Fiberglass Resin Repair Kit, 00420, 0.45 Pint

  • Based on 3,908 reviews
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Availability: In Stock.
Fulfilled by Fat Boy Tools
Arrives Aug 6 – Aug 8
Order within 23 hours and 39 minutes
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Size: 1 Count (Pack of 1)


Features

  • EASY DO-IT-YOURSELF KIT to repair holes and scratches on automobiles, boats and more
  • 100% WATERPROOF seal for long-lasting, durable repairs
  • STRONG AND VERSATILE FORMULA for multiple surfaces including concrete, wood, fiberglass, and metal
  • Sandable in under 2 hours
  • Includes everything that is needed for the DIYer - fiberglass resin, liquid hardener, plastic spreader, fiberglass cloth, mixing stick and mixing tray

Description

Bondo Fiberglass Repair Kit is a do-it-yourself solution for easy and effective auto body repair. Users can repair cracked, broken or rusted automobile body components quickly, easily and at a fraction of the cost versus part or panel replacement. The kit includes resin and hardener for a permanent, 100% waterproof seal that hardens in as little as two hours and is compatible with most paint.

Manufacturer: ‎3M


Brand: ‎3M


Model: ‎Bondo 420 Fiberglass Repair Kit, 4.5d-1 Pints


Item Weight: ‎12.8 ounces


Product Dimensions: ‎3 x 4 x 7 inches


Item model number: ‎420


Is Discontinued By Manufacturer: ‎No


Exterior: ‎Polished


Manufacturer Part Number: ‎420


Bulb Type: ‎Fluorescent


Special Features: ‎Durable, Versatile, Quick Repair, Comprehensive Kit


National Stock Number: ‎7510-00-530-5511, 7510-00-530-5514, 7510-00-584-5953


Date First Available: July 7, 2004


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 6 – Aug 8

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Solid Fix – Easy to Use and Works Like a Charm!
Size: 1 Count (Pack of 1)
I used the Bondo Fiberglass Resin Repair Kit (00420, 0.45 Pint) to repair a crack in my kayak hull, and I’m seriously impressed. I had never worked with fiberglass before, but this kit made it super manageable for a first-timer. The instructions were clear, and everything I needed was right in the box — resin, hardener, fiberglass cloth, and a mixing tray. The resin mixed well and spread smoothly, giving me plenty of working time. It hardened exactly as expected and left a solid, watertight seal after curing. After a light sanding and some paint, the repair was barely noticeable. It’s held up great through a couple of trips on the lake so far. Highly recommend this for small to medium fiberglass repairs — whether you're patching up boats, car panels, or even outdoor equipment. Just make sure you have gloves and work in a well-ventilated area, as the smell is pretty strong. Definitely a product I’d buy again. ... show more
Reviewed in the United States on July 3, 2025 by GDMG
    • Easy to use
Size: 1 Count (Pack of 1)
Strong, effective
Reviewed in the United States on May 23, 2026 by Tyler Lyon
    • Good product
Size: 1 Count (Pack of 1)
Don’t dilly dally once you mix this., Work it quickly because it heats up and hardens very quickly. Easy to work with and sanded with very little effort
Reviewed in the United States on June 10, 2026 by Anthony
    • Fixed my dad's Harley that I broke 3 years ago..
Size: 1 Count (Pack of 1)
I broke my dad's Harley 3 years ago. How I lived this long to write this review is unknown to me. I thought I'd end up in a ditch out in the country when he found out I broke it. Anyways, like the good son I am, 3 years later I order the less than $25 repair kit to see what magic I could work up on his Harley. It honeslty worked like a charm. It was very easy to apply and has held up incredibly over the last few months. If I had known it was this cheap and easy to fix his Harley, I would've done it years ago...maybe. ... show more
Reviewed in the United States on July 22, 2025 by Lucas Albertson
    • Makes repairs easy, not a lot of left overs.
Size: 1 Count (Pack of 1)
I have used this several times to repair my plastic hood. It is easy to use, good price too!
Reviewed in the United States on May 21, 2026 by Harold H. Byers
    • 3 sq ft of cloth included in box
Size: 1 Count (Pack of 1)
Review Image by Edward
To clarify, the amount of fiberglass cloth included is 3 sq ft ... not 8 sq ft as the product pictures suggest. I've attached a picture of the side of the box that lists the contents of the kit. Otherwise, it's a nice and economical kit for small fiberglass repairs. Worked very well for me.
Reviewed in the United States on May 23, 2025 by Edward
    • Needs more hardener
Size: 1 Count (Pack of 1)
Review Image by I. Barden
Review Image by I. Barden
Review Image by I. Barden
Product is useful for large patches. I like that it dries quickly. I'm not satisfied with the amount of hardener that it comes with. You are guaranteed to run out of hardener and still have resin and cloth left over.
Reviewed in the United States on February 19, 2026 by I. Barden
    • Works great and very strong
Size: 1 Count (Pack of 1)
The plastic handle on our ancient upright vacuum broke. I used superglue to cement the two ends together, however a cemented butt joint is not very strong, so I used this kit to create a tight, strong cast around the handle and it is working fine. Working time is just right: plenty of time to mix, spread, dab the up side of the fabric, and squeegee the resin/cloth flat before it starts to set, and easy to add a second layer before it is fully set. The only nit pick is that it’s a little difficult to determine how much resin you’ve used because the bottle is opaque and there is no measuring cup. Evidently that measurement doesn’t seem to be critical. ... show more
Reviewed in the United States on December 6, 2024 by Peter K

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