3M

Bondo Fiberglass Resin Repair Kit 00420 0 45 Pint

$19.99$21.23

718+ bought in the past month

About this item

  • 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
$19.99
Was $21.23Save $1.24

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Product details
Brand3M
Specific Uses For ProductFleet and plant maintenance.
MaterialFiberglass Resin,Plastic,Fiberglass Cloth
Item FormLiquid
Special FeatureDurable, Versatile, Quick Repair, Comprehensive Kit

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Customer reviews

4.53,841 ratings
  1. 575%
  2. 413%
  3. 313%
  4. 20%
  5. 10%

Customers say

Customers find the fiberglass repair kit works well for various projects, including camper repairs, and appreciate its ease of use, particularly how easy it is to mix small batches.

★★★★★

Solid Fix – Easy to Use and Works Like a Charm!

GDMGJuly 3, 2025✓ Verified purchase

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. Read more

★★★★★

Works great

JamesFebruary 7, 2026✓ Verified purchase

My fiberglass bathtub cracked and this was a lifesaver. Would highly recommend Read more

★★★★★

Legit.

Mark L. SmithNovember 26, 2025✓ Verified purchase

This used to be so much cheaper... It does work very well and is easy enough to sand. Read more

★★★★☆

Finally fixed the fence

CandiceOctober 23, 2025✓ Verified purchase

I had my vinyl fence crack at the latch. Used spray foam to fill the space and then layers this fiberglass resin. Can you tell we fixed the latch? Yes, but now it's rock solid and I don't have to worry about it cracking again. You will need to take the gate off and let it sit for a few days. Should you need to use it for that. Read more

★★★★★

Easy to use but do your homework and take your time. DO NOT RUSH

BigBenAugust 2, 2025✓ Verified purchase

It's bondo, what else you need to know. 2 part mix, all utensils included. Quick and easy, dries fast, sands off fairly well. Dries hard and durable. I used it to reform and build a motorcycle rear fender. Stronger then it was to begin with. Will definitely use again.ake sure to have extra gloves. 1 set included but is fairly sticky so they don't go far. Worth the money but you can't rush the process, respect the process and take your time. It WILL pay off. Read more

★★★★★

3 sq ft of cloth included in box

EdwardMay 23, 2025✓ Verified purchase

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. Read more

Review image 1
★★★☆☆

Dennis

Dennis A.March 8, 2026✓ Verified purchase

Easy to use Read more

★★★★★

Excellent product

RyanJune 10, 2025✓ Verified purchase

Easy to use and comes with everything you need! Mixing tray, mix, stir stick, cloth and everything else you need EXCEPT gloves. No rubber gloves. Hardens FAST!!! Follow the directions exactly as listed. Used this for a hole in pop up camper roof and it is great! Read more

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