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3M Company 401 FBGLS RESIN PT 12/CASE

<li>Brand : 3M</li><li>Model # :401</li><li>Product Weight : 1.5</li><li>Product's Dimensions :1.92 x 6.53 x 3.87</li><li>Used As A Sealer On Damaged And Rotted Wood</li><li>Seals Concrete, Is Great On Large Or Small Metal Rust-Outs And Joins Most Surfaces Together While Creating A Strong And Long Lasting Bond</li><li>Includes Liquid Hardener</li><li>Sandable In Less Than 2 Hours</li><li>Compatible With All Paints, Including Gel Coat And Marine Paints</li>

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<p>FBGLS RESIN PT  12/CASE-B56401   Bondo Fiberglass Resin is the same high-strength polyester resin that is used to build most boats. Can be used alone or with fiberglass tape, cloth or mat to repair damaged fiberglass boats, snowmobiles, jet skis, bathtubs and showers. Can also be used as a sealer on damaged and rotted wood. Seals concrete, is great on large or small metal rust-outs and joins most surfaces together while creating a strong and long lasting bond. Sandable in less than 2 hours. Compatible with all paints, including gel coat and marine paints. Waterproof. Includes Liquid Hardener.     , Unit Type : CAN, , Unit Size : 14 Ounce, , Unit Quantity : Case Of 12</p>

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If you really need great adhesion to smoother surfaces, I'd suggest epoxy resin. But if you can rough-up the surfaces, are working over old fiberglass or previous layers, this stuff is great. Measure the hardener carefully and adjust the quantity to your application. I mix 4-6 oz resin with 8-9 drops hardener at 80-90 degrees F and it begins to gel in about 15 minutes. I'm building water tanks for a RV van project. I'm using this resin with cloth and mat to attach and seal FRP sheets.

A great all-around polyester resin.

3m.com

[This review was collected as part of a promotion.] it is fiberglass. it is half fiber half glass. there is a whole 0.9 pint of it. it is made by 3M!

as described!

walmart.com

[This review was collected as part of a promotion.] The product itself forms such a strong and reliable bond. The price is great too.

Bondo resin for fiberglass is the only product I use.

Only brand to use

I used this product on kid's bath tub around drain area,  after applying product i sand just as instructions said. Then replaced the plumbing for the drain and no more leaks. A big thumbs up for this product.

Worked very well

I bought and used this product the same day. Waiting a full day before sanding and it was hard but tacky ruined my sandpaper so I waited another full 24 hours and same result. Now my canoe is sticking to everything I can't sand it to paint it. I'm very disappointed in this product I wish I didn't waist the money on it. I don't know what to do with it now.

Sucks

DO NOT USE THIS PRODUCT! 
After precise mixing and application conditions. I let the resin dry for 3 days. Went back to sand it and it was hard, but tacky to the touch and would immediately gum up sandpaper. Called the support line and they tell me there is a one year shelf life on the product, although no expiration date is printed. Purchased a few days before application and it was over 3 years from the manufacture date (has to be extrapolated from the lot number). This product ruined my boat project I have been working on for over a year.

Terrible Product! Should be discontinued

I've bought and use around six gallons of this fiberglass resin to make two bumpers and started on a center console. Your gallon resin works incredibly well, but I only needed about a quarter to finish the console that I'm working on, but this stuff is garbage. I applied it with the correct mixture of resin to hardener and it didn't come close to setting after 2 hours. Next I mixed twice the amount of hardener, waited and it still did not set. Now I have to buy a gallon for a quarts worth of work and also lost a whole day. My question is why are the two sizes different resin? I never would of bought it if I knew that. Next question asks if I would recommend this product, my answer would be that I would recommend the gallon size to everyone, but not the quart size.

Why is the smaller container different from the ga

I tried using 3M Fiberglass Resin (20122) to repair a cracked hard-sided suitcase. It never cured – not even with a 2X dose of hardener. Now I've got a sticky gooey mess to deal with – possibly unrepairable.

This could be due to the product sitting on my shelf for a year or two – unopened, and in an air conditioned indoor closet. However, I DID inspect the can for an expiration date – and found none. Likewise, I checked the hardener – nope – no date. I scoured the 3M website for anything on shelf life - nada. The umpteen page MSDS sheet- nein. I thought to myself “3M is always top quality stuff – if there's no shelf life info, it must still be good”. My bad. SHAME ON YOU 3M for not providing shelf life info or use-before date - especially on a product with apparently short shelf live.

This experience has re-calibrated my thinking about 3M. I used to hold them in the highest regard as an ultra-reliable source of professional materials. From here on out, I'll be looking for better options.

Never Hardened / NO PUBLISHED SHELF LIFE INFO!!

Followed the instructions on the can...and it won't harden. Mixed exactly 8 oz with 80 drops of harder, mixed and used a paint brush to cover my outdoor town clock...now I have a goo finish.
Paint brush harded but not the clock finish....

Won't harden