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Getting ready to allow nanobots on board.

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redeye
Master Marine Consultant

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Response Posted - 04/25/2014 : 11:16:29

<<Ray, I'm not sure I understand. always used Captain Tolley's, but couldn't say if it works? >>

Yepper...

Cptn Tolley's is something I've always kept on board and I apply it to hairline cracks. It wicks into the crack and seems to disappear, and I wipe off the excess. That's about the extent of the affects I see from it's use. I could use gallons on my boat.

My understanding is that the boat has a vinylester gelcoat covering ( that is White ) over several layers of resin and wood and fiberglass.

The vinylester is relatively soft and somewhat flexible ( compared to solid epoxy resin ) and is most probably mixed with something that makes it a UV inhibitor.

Over time ( 30 years in my case ) in the hot sun the coating is not what it once was.

Anyhoo.... it gets cracks ( itty bitty spider cracks ) that show up black... I wax the deck and expected that to seal the cracks, but as they age and get bigger then more water gets into the deck. That water is not good, especially of you are in an environment that freezes.. So it is good to put something on the cracks that would wick into the crack and seal it up.

If the cracks were any bigger ( and really leaking ) I'd dig them out and patch them with resin, or a caulk.

I've used Captn Tolleys for years, but I've never seen the effects .. if it is keeping water out of the desk.
I'm sure it is but you can't see it. If water keeps wicking into an area the material inside may delaminate with time.

Brit has very kindly tried and reviewed a new similar product and his review is very interesting in that it appears to not only seal the crack but makes it less visible ( sweet )

None of this bothers me much as my boat is pretty old.. a newer boat and I'd wanna seal the spider cracks as they appear.

Regarding the patch product... I've had frustrating experiences in the past with store clerk recommendations for making patches.

1. Marine Tex... a very hard substance which sets up so hard you can sand out a moat around the patch before you actually get it to sand down.

2. a resin patch... ( also very hard to sand unless you mix in a lot of microballs. ) and often drips before kicking.

3. the white gel coat patch from West Marine has worked as good or better than anything for me. certainly is easy to use.

I like to show people this image to give them an appreciation of how thin the gelcoat is, and how thick the hull is.

The Deck looks like this

So yes.. the gelcoat is pretty thin... pretty hard to sand anything and not go through.. I don't think of repairing anything as a gelcoat repair.. I think of it as a resin repair and then paint some gelcoat over it.

SO ... you can wax it.. creep it... and now nanobot it if you have hairline cracks that worry you.

Nanobots... really...

Edited by - on

Ben
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USA
1234 Posts

Response Posted - 04/28/2014 : 13:10:34

Thanks Ray; good write-up of Capt. Tolley's. I just ordered my own MagicEz Hairline Crack Fix. :)

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TakeFive
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Response Posted - 04/28/2014 : 14:56:46

I also use, and have been happy with, Captain Tolley's. But 1/32" is definitely too wide for it to seal, unless the crack is limited depth. It works by capillary action, and the crack needs to be small enough for it to fill the entire volume after a few applications.

FYI, Elmer's glue is vinyl acetate emulsion polymer. The yellowish colored "wood glues" of various brands are like Elmers glue, but with n-methylol acrylaimide reacted into the polymer to provide crosslinking for greater strength, especially in moist environments. That's what makes it yellow colored.

Captain Tolley's is acrylic polymer dispersion. I believe that Poliglow is a polyurethane dispersion.

If you need "gallons of the stuff" you might try Poliglow as a crack filler. Based on my physical observation, its properties are similar to Capt. Tolley's (similar viscosity and surface tension, but no measurements to back it up), and you get a lot more for your money. I haven't tried this myself, so you're on your own, but you might find that it works well. One important test would be to measure out a sample of each before and after drying to be sure the Poliglow is not dramatically lower in solids content. This is important for its crack filling properties.

Edited by - TakeFive on 04/28/2014 14:58:17

Stinkpotter
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Djibouti
9076 Posts

Response Posted - 04/28/2014 : 17:01:09

But Poli Glow is essentially clear. Is that wat you want for filling cracks? It might penetrate and seal, but the crack will probably be more visible than before the PG was added.

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TakeFive
Master Marine Consultant

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Response Posted - 04/28/2014 : 17:06:31

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Stinkpotter
 But Poli Glow is essentially clear. Is that wat you want for filling cracks? It might penetrate and seal, but the crack will probably be more visible than before the PG was added.
<hr height="1" noshade id="quote"></blockquote id="quote">
Captain Tolley's also dries clear.

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redeye
Master Marine Consultant

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Response Posted - 04/29/2014 : 03:46:52

Reguarding MagicEzy...I don't know about any "nanobots" which sounds like BS to me.. but the

Key Ingredients:

• (CAS#): Proprietary Resin
• Zinc Oxide (1314-13-2)
• Dipropylene Glycol (25265-71-8)

Resin with Zinc to turn it white and act as a uv barrier, and a little glycol to loosen it up. Sounds like a pretty reasonable combination.

But don't start tellin me it works on an atomic level..

Edited by - redeye on 04/29/2014 03:48:39

britinusa
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Response Posted - 04/30/2014 : 03:46:23

Perhaps: Each little nano bot is programmed to seek out dark voids. So it unnaturally works it's way into hairline cracks. Once stationary, they are programmed to hook onto their neighboring nanobot. They get their energy from the Hydrogen and Oxygen molecules of their solution. As they consume energy, they become inert and loose all ability to move. In that final act, they solidify throughout. Now, inert, they are just a molecular part of their surroundings and can be sanded and machined as a homogeneous material.

Paul

Edited by - britinusa on 04/30/2014 03:46:48

redeye
Master Marine Consultant

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3476 Posts

Response Posted - 04/30/2014 : 05:02:39

A molecular miracle no less.

I think my industry has become enamored with using the term nanometer.
And one of my favorites, "Coherent Light" rather than saying Laser.

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TakeFive
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Response Posted - 04/30/2014 : 07:03:41

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Kim Luckner
 Is Evercoat the brand name of the gel coat repair material from West Marine?
<hr height="1" noshade id="quote"></blockquote id="quote">
Just to make sure this is clear, Evercoat is not a house brand for West Marine. Evercoat has a huge range of products, for marine and other applciations. [url="http://www.evercoat.com/productcategory.aspx?cat=22"]Here are a few[/url] of the ones targeted at the repair market. You can purchase these at West Marine, or other dealers.

Most of Evercoat's products are "real" two-part polyester gelcoats. Many are kits that come with tints that you can blend (though it can be very difficult to get the right match).

The one-part tube product is called "Gel Coat Scratch Patch." I have used it for repairing gouges, and it is very easy to use and gets a nice result. It will not magically seek out dark voids in spider cracks, but it serves its intended purpose well. As others mentioned, it sands down very nicely, so it's easy to build up a little excess around the gouge, and just sand until its boundary matches the original gouge. Because it does not crosslink, it is less solvent resistant than a true two-part polyester gelcoat. I suspect that it is more UV resistant than a two-part epoxy.

Edited by - TakeFive on 04/30/2014 07:07:30

OLarryR
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Response Posted - 05/03/2014 : 08:58:59

Paul - Thanks for the topic. I finally got around to ordering a tube of the MagicEzy Hairline Crack Fix.

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