Model # 20122

Internet #202077790

Store SKU #451738

3M Bondo 1 qt. All-Purpose Fiberglass Resin


Bondo 1 qt. All-Purpose Fiberglass Resin

  • 100% waterproof repairs on concrete, wood, fiberglass, and metal
  • Repair tubs, showers, sinks, pools, automobiles, boats and more
  • Use with Bondo Fiberglass Cloth or Mat for stronger repairs
$14.97 /each

Frequently Bought Together

Product Overview

Bondo Fiberglass Resin is designed for repairing cars, boats, snowmobiles, jet skis, bathtubs and showers. This high-strength polyester resin creates waterproof repairs on metal, fiberglass and wood as well as seals concrete and rotted wood. Use it to join surfaces together while creating a strong, waterproof and long lasting bond. This product can be used with Bondo Fiberglass Cloth or Mat to create a stronger repair and is sandable in less than 2 hours. Bondo Fiberglass Resin is waterproof and is compatible with all paints, including gel coat and marine paints. Liquid hardener is included.

  • All-purpose fiberglass resins works for many repair projects
  • Versatile formula repairs fiberglass, metal, wood and masonry
  • Resin is compatible with all paints and gel coats
  • Quick-acting formula allows sanding in approximately 2 hours
  • Product may vary by store

Info & Guides

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Customer Questions & Answers

Does this dry clear?

Asked by: PTurner
I made a second purchase, different state, a gallon. This again has a significant color like used oil and will discolor any pigment added to it.
Answered by: Roy
Date published: 2016-12-29

is this epoxy or polyester?

Asked by: jimmer
Thanks for asking! This is a polyester based resin.
Answered by: 3M Social Engagement
Date published: 2016-11-08

absorb water? electrically conductive?

Hi, I'd like to use this to "pot" electronic circuits. I've read on web that it is no good for this because it absorbs water and becomes somewhat electrically conductive. Sounds wrong to me, but is there any truth to that? -Thanks
Asked by: drjohn
I answered this question myself by experiment. I "potted" two conductors (about 1/2 in apart) in this resin, tossed it in a salt water canal, and let it sit for 3 weeks. After I pulled it out and dried it off, I measured about 2 megohms between the leads. That's a pretty high resistance and probably Ok for power circuits, but probably not for sensitive electronics.
Answered by: drjohn
Date published: 2016-10-04

Can this be used on a radiator?

I have a tiny crack in the plastic part of my radiator. Will this hold under the heat and pressure?
Asked by: Joe
No, the resin cannot be used on a radiator.
Answered by: CommunityAnswer
Date published: 2016-09-06
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Customer Reviews

Bondo 1 qt. All-Purpose Fiberglass Resin is rated 4.2 out of 5 by 5.
Rated 4 out of 5 by from Good product, bad instructions. Product is a good polyester finishing resin. It also works as a casting resin. But the mixing instructions that state "1/4tsp hardener to 3oz resin" is wrong. If use that ratio it will set in less than 2 minutes*. A much better ratio is 1/4tsp to 4oz resin, this will give you about 8 minutes* working time. *Both of these times are for normal 70°-80° temp and includes 1min mix time.
Date published: 2016-11-16
Rated 5 out of 5 by from It's been around forever and works well. I mainly use this stuff to make micarta for knife handles. Works great, sticks to almost anything except wax paper. The previous rater gave it 2 stars for something he admitted was his own fault. Any product that is intended to dry or cure will eventual do so even in the bottle.
Date published: 2014-07-26
Rated 5 out of 5 by from Fixed a car bumper My mother-in-law damaged her car bumper when she caught it on a curb. The cracks kept spreading in all directions and was getting worse and worse. She asked me to take a look at it and mentioned she didn't need to be pretty just stop the cracks from getting worse. Followed the directions and also bought some of the fiberglass cloth to give it something to adhere to and additional strength. Even in 60 degree weather it set within 2 hours and the next day I sanded it down. Feels very strong and seems to have bonded to the plastic bumper just fine. I still have a lot of the cloth and resin leftover with plenty of hardener that came with it so I'll be looking for more things to fix before it gets too old to use.
Date published: 2015-11-30
Rated 5 out of 5 by from buy it its a good buy seals and waterproofs Used forever works for everything!!! Water tight seal
Date published: 2015-02-24
Rated 2 out of 5 by from Resigned to Resin One recommendation, use the product quickly after purchasing. I bought the Fiberglass, Resin & hardener on sale a while back trying to save a buck until I got around to my project. There are no expiration dates or directions to use within a certain amount of time. Even though I never opened the can of resin as I got it out of the cupboard today found that it is now hard as a rock. Yes, its my fault, but sure would have been nice to know in advance
Date published: 2013-03-06
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