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3M Marine Premium Filler
$70.91Out of Stock
3M Marine Premium Filler
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4.1
Based on 8 Reviews
  • 5 Star

    63%

  • 4 Star

    13%

  • 3 Star

    0%

  • 2 Star

    25%

  • 1 Star

    0%

3M Marine Premium Filler Customer Questions and Answers

10 of 17 Questions

Question

does it come with hardner?

Asked on 11/23/2016 by carl b

Top Answer

YES

Answered on 11/23/2016 by MICHAEL CAHOON
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Answer

Yes

Answered on 11/23/2016 by EVAN CONNOR

Answer

Yes it's enclosed,great product but sets very fast

Answered on 11/24/2016 by MICHAEL DEVEREUX

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Yes it does!

Answered on 11/24/2016 by PETER DEEVERS

Answer

Yes, in a small plastic tube.

Answered on 11/23/2016 by JOHN DURANT

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YES

Answered on 11/23/2016 by MICHAEL CAHOON

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Yes, there is a tube of hardener that comes with the can of filler. I have only used it a little bit, but it is the best filler I have found. Easy to mix and apply, and dries in about 30 minutes and sands like a dream. It may be too expensive to use on big fill jobs, but is great for filling the last round of low spots before painting.

Answered on 11/23/2016 by MICHAEL SEIBERT
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Question

What is the maximum thickness per application for a repair? how does this product differ from Interlux Watertite?

Asked on 09/21/2011 by Lawrence Boroviak

Top Answer

Also, I am looking for a video as to how to apply the product. Do you know of any such video? Thanks

Answered on 11/16/2013 by WILLIAM BERGER
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Answer

The Interlux is better for filling holes and is the only product recommended by Interlux for prepping surfaces for below-waterline barrier coat treatment.

Answered on 05/21/2012 by MICHAEL CLAUDON

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What is name of interlux product you recomment? and also how long a working life does it have before it hardens? Thanks

Answered on 11/16/2013 by WILLIAM BERGER

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Thanks for the quick reply I have a LARGE amount of holes I need to fill on a 44 foot Marine Trader. I am concerned I can only mix a golf ball size amount. It will take months. Bill

Answered on 11/16/2013 by WILLIAM BERGER

Answer

William, It is 3M Marine Premium Filler. In our experience, the working pot life is at most 15 minutes when it is about 65F in the shop. The pot life drops the warmer it is. We do not mix more than about a golf-ball-sized lump at a time. Apply thin coasts and you can sand in 30 minutes. Others have criticized the product for requiring 3-5 coats to completely fill holes and fair surfaces, which puzzles me. Thin coats allow you to control build-up and also reduce the chance of coming away with a surface that is not absolutely flat. We use this product exclusively, mainly because it sands well, can be applied in thin coats and is hard as nails once it is cured.

Answered on 11/16/2013 by MICHAEL CLAUDON
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Question

What does the ambient air temperature need to be to use this product?

Asked on 11/27/2015 by MARK GINSBERG

Top Answer

Spec sheet says over 60 degrees F. This stuff hardens fast so only mix a small amount at a time.

Answered on 11/27/2015 by DAVID LEWIS
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Answer

The MSD shoot on this product probably include that information. But I have found that it works between 65 and 90•À_•À__•À_•À__•À_•À__ pretty well

Answered on 12/04/2015 by Richard Arnold

Answer

Thank you, I have another question. I drysail my boat, a wood thistle racing dingy. on the bottom I have Pettit 98 Solid Coat gloss white. Is there a better bottom finish? Ideally something that does not require stripping the Pettit paint. Thank you, Mark

Answered on 11/28/2015 by MARK GINSBERG

Answer

Not sure but most epoxy type products are used above 50 degrees F. You should be able to get a spec sheet from 3M .

Answered on 11/27/2015 by DAVID LEWIS
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Question

What advantage is there t this over fairing/filling with epoxy and microballoons?

Asked on 04/02/2014 by robert Patterson

Top Answer

It's premixed ready to use. That's all I see over epoxy with microballoons.

Answered on 04/02/2014 by Rick White
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Answer

Sets up and cures really fast, about 10 minutes of pot time. Can be sanded the same day.

Answered on 05/29/2014 by DAVID LEWIS

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it is good on filling in cracks. I would very easily use it aas often as needed on different projects.

Answered on 04/04/2014 by STEVE FOWLER

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I can't say there is an advantage, but I redid my fiberglass pool last fall. When I say I redid my pool, I mean removed and patched hundreds of osmosis blisters. This product was easy to work with, covered more than was estimated and looked great after final sanding. I used epoxy paint over the entire pool and only on very close inspection are the patched areas noticeable. When the pool is filled with water, the patches are invisible. The paint adhered perfectly. We had our worst winter in decades and no issues with the patched areas of the pool or paint. I haven't used the other product you are asking about, but I can highly recommend this product.

Answered on 04/02/2014 by WALTER MARGESON
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Question

we hava a 21 foot four winns horizon which we removed the carpet, replaced the plywood floor and have fiberglassed it. We want to use a gelcoat finish on the floor but need to use some type of filler to smooth out the dips prior to applying the gelcoat. Would this product do the trick or do you recommend something else?

Asked on 06/29/2015 by nancy baker

Top Answer

I performed essentially the same process about a year ago with the exception of applying gelcoat. I painted with a quality one part topside paint instead and have been very pleased with the results.

Answered on 06/30/2015 by DENNIS REMLEY
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This would be good and tough stuff for that. Go easy on sanding to prevent more dips etc.

Answered on 06/30/2015 by PETER DEEVERS

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This stuff will work for what you are doing but it is pretty expensive. It sets up really fast with a working time of only about 10 minutes. You might want to use epoxy or polyester resin with colloidal silica so you can mix it the consistency you want and have a longer pot time. Polyester resin will be cheaper. Also the epoxy will be self leveling if you don't thicken it too much. This stuff is kind of like Bondo, it sands really easy but has a pretty coarse texture. I only used it to fill in screw heads for seacocks to fair to the hull on a sailboat, and I coated it with epoxy on top of that. Call Joe Merton and Merton's Fiberglass Supply in Springfield Ma and ask him what he recommends. Joe is an old friend and will give you good advice and great product support.

Answered on 06/30/2015 by DAVID LEWIS
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Question

Can you use this product under finish gel cote? I have some gouges that would take multiple coats to even get close to filling the gouges before using the finish gel cote.

Asked on 06/17/2015 by Doug Field

Top Answer

Yes, this is thick stuff like bondo you would use on a car to fill in a dent.

Answered on 06/30/2015 by DAVID LEWIS
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Answer

I wouldn't know about under gel cote, but it worked great under top side paint.

Answered on 06/30/2015 by PETER DEEVERS

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Yes, this product will be a good choice for filling gouges.

Answered on 06/17/2015 by Rick White
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Question

How does this product work on a wood hull (topside) for fairing, i.e. smoothing dings, low 6"x6" areas etc. prior to painting with an enamel?

Asked on 05/29/2014 by Undisclosed

Top Answer

The filler will work for repairs of dings in wood. There are two tricks to use. First, rough the surface with a dremel tool and clean with acetone to ensure a strong bond. Second, start sanding smooth as soon as the product solidifies enough to sand. The filler is very hard when fully cured and waiting too long to sand smooth will result in the sandpaper biting the wood better than the filler. This leaves an indentation around the repair rather than a smooth transition from repair to wood.

Answered on 05/29/2014 by GEOFFREY CHAMBERS
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Answer

It says it is made for fiberglass so I can't comment on use on wood. It sets up really fast and cures extremely quickly so you can sand it the same day you apply it. You only get about 10 minutes of pot life with it. Seems like it would be good for your application, why not try a small amount on some boards in you garage and take it from there?

Answered on 05/29/2014 by DAVID LEWIS

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I recently restored an old drift boat and there was rot on the topside hull 3 plies in. I cut about a 12 X 12 area filled it smoothed nicely

Answered on 05/29/2014 by MATTHEW WERNER
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Question

what color is 3M Marine Premium filler after it has hardened?

Asked on 04/17/2013 by Rob S

Top Answer

The filler is a light blue color.

Answered on 04/19/2013 by JOHN KIMZEY
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Color is off-white when hardened.

Answered on 04/19/2013 by ANN SIMON

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In my case it was sort of a robin's egg blue

Answered on 04/19/2013 by David Bryant Last Name
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Question

is this suitable to repair a slow leak while the boat is in the water? i don't want to have to pull mine out and wait for the agent to cure. Thank You in Advance

Asked on 05/06/2012 by Randy White

Top Answer

Absolutely not. Coming into contact with water will inhibit curing, at the very least, and may well stop it altogether. Sorry, but I do not have experience with or knowledge of anything that can cure your problem while your boat is in the water. Hydrostatic pressure will push anything you apply from the inside out of the hole. Well, if you can get at it from the outside, maybe Gorilla duct tape will stick to the hull, but I doubt it.

Answered on 05/21/2012 by MICHAEL CLAUDON
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Answer

Hello. I have never applied this filler while the boat is in the water so I couldn't honesty tell you whether it would work or not. The product hardens from a chemical reaction with the hardener so I assume it would cure under the water. My main concern would be how well the filler would bond to the hull while in the water without a proper sanding and cleaning first. I would call 3m to ask. It is the only filler that I use for repairs and the most reliable. It doesn't shrink or crack and the tint of the hardener makes mixing visually easy. There are other products made especially for your purpose and made to cure under water for repairs under water. I have heard about aqua stick but have never used it. I hope this is helpful.

Answered on 05/08/2012 by JOHN KIMZEY

Answer

Using on pool slide

Answered on 06/03/2012 by ANN SIMON
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Question

Will this product stand up to rain if I am not able to get it painted right away?

Asked on 10/05/2015 by Troy Paul

Top Answer

This stuff is suitable below the waterline a vinyl ester with glass bubbles 2 part epoxy type formula make it tough and good for wet environment. I have used it all over my boat, below water line under bottom paint, under topside primer and paint, and a few spots on deck chips that I haven't gotten around to painting in over a year, and those spots are holding and looking just like when I applied the "stuff".

Answered on 10/05/2015 by PETER DEEVERS
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Answer

Peter, Thanks for the info. It will help me a lot. I'm nearing the end of a long project of glassing the deck and hull of my Compac 23 together. I just began fairing the joint. I'm really liking the 3M Filler. Only wish the working time was a little longer and the filler a little creamier. Thanks again.

Answered on 10/05/2015 by Troy Paul
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