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Go Back   SailNet Community > On Board > Gear & Maintenance > 3M Marine High Strength Repair Filler
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Thread: 3M Marine High Strength Repair Filler Reply to Thread
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Topic Review (Newest First)
05-15-2013 11:53 AM
pauloman
Re: 3M Marine High Strength Repair Filler

google Wet Dry 700 - it is a kevlar - feldspar reinforced epoxy paste that can even be applied underwater. (has saved a number of sinking boats and leaking swimming pools)
05-14-2013 08:53 PM
SloopJonB
Re: 3M Marine High Strength Repair Filler

Quote:
Originally Posted by miatapaul View Post
Yes, 3M makes good products, but I can't see filling a 3 inch by 5 inch hole without using some glass if you expect there to be any strength. I once upon a time filled holes about that size with bondo on a fender and it did not last long! Perhaps a screw hole, but not a big opening like 3X5. I think one good kick and it will pop out or at least crack.
Missed that bit.

Definitely can't fill a big hole with filler.
05-13-2013 05:06 PM
jameswilson29
Re: 3M Marine High Strength Repair Filler

Wow, you are right. The label on the can reads "Fiberglass Resin" and, upon checking the ingredients, I see polyester resin. Thanks for the education. I need to learn to read ingredients more closely before shooting off my mouth.

Now I have to eat my smart aleck comments, along with my hat.
05-13-2013 03:54 PM
asdf38
Re: 3M Marine High Strength Repair Filler

Quote:
Originally Posted by jameswilson29 View Post
Yes, Lowes sells 3M epoxy and hardener and fiberglass cloth for quite a bit less than the marine sources.

Of course, it cannot possibly be as good as "marine" epoxy, hardener, and cloth, because it is half the price and does not have a picture of a boat on the label... (Plus, no one is making seemingly objective claims of incredibly superior tensile strength based on their own in-house testing.)
If they sold epoxy resin that would be news to me. I thought they had 3m polyester resin. Not that that's bad but epoxy is a notch better.
05-13-2013 03:50 PM
jameswilson29
Re: 3M Marine High Strength Repair Filler

Quote:
Originally Posted by asdf38 View Post
Speaking of 3m Home Depot sells 3M glass cloth. $7 for 9ft sq. I'm not sure how that stacks up to marine prices but I'm guessing its less (for that small a size anyways).
Yes, Lowes sells 3M fiberglass resin and hardener and fiberglass cloth for quite a bit less than the marine sources.

[Erroneous smart aleck comments deleted by author.]
05-13-2013 03:46 PM
asdf38
Re: 3M Marine High Strength Repair Filler

Quote:
Originally Posted by miatapaul View Post
Yes, 3M makes good products, but I can't see filling a 3 inch by 5 inch hole without using some glass if you expect there to be any strength. I once upon a time filled holes about that size with bondo on a fender and it did not last long! Perhaps a screw hole, but not a big opening like 3X5. I think one good kick and it will pop out or at least crack.
Oh I agree. I missed that. Speaking of 3m Home Depot sells 3M glass cloth. $7 for 9ft sq. I'm not sure how that stacks up to marine prices but I'm guessing its less (for that small a size anyways).
05-13-2013 03:12 PM
jameswilson29
Re: 3M Marine High Strength Repair Filler

I used fiberglass resin with colloidal silica to thicken for filling bolt holes. I agree with miatapaul about using glass and resin for structure and strength in any larger areas.
05-13-2013 03:06 PM
miatapaul
Re: 3M Marine High Strength Repair Filler

Yes, 3M makes good products, but I can't see filling a 3 inch by 5 inch hole without using some glass if you expect there to be any strength. I once upon a time filled holes about that size with bondo on a fender and it did not last long! Perhaps a screw hole, but not a big opening like 3X5. I think one good kick and it will pop out or at least crack.
05-11-2013 09:07 PM
Ritchard
Re: 3M Marine High Strength Repair Filler

While I am also a 3M fan, I'm more an epoxy fan, especially below the waterline.

A nice epoxy mix with some 407 or 410 filler mixed to the needs of each particular job is as maleable as you need it for each such job, and sands wonderfully. The 410 is awfully light though, only for cosmetic repairs. 407 is someplace between cosmetic and structural.
05-11-2013 08:21 PM
asdf38
Re: 3M Marine High Strength Repair Filler

Quote:
Originally Posted by SloopJonB View Post
I haven't used it but every 3M product I've ever used has been the best of whatever it was. I would use that filler in a heartbeat.

It's a great company.
Yeah I pretty much second this. 3m makes a lot of great products. I'm really fond of their VHB structural 2 sided tape. Although I've probably used it in a few too many places.

That said it's also impossible to go wrong with west system epoxy which will also do the deck fill jobs you're talking about and a lot more. It's expensive to initially buy the 105, 205, filler, pumps, syringe etc but once you've got it you can do everything and epoxy is pretty much the best for all these types of jobs.
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