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Author Topic:   Marine Tex / Gel Coat Repair
JOHN W MAYO posted 08-07-2002 09:24 AM ET (US)   Profile for JOHN W MAYO   Send Email to JOHN W MAYO  
Has anyone used marine tex to repair minor damage on the keel from trailering the boat? I have an area about 2 feet long by 1/4 inch that the gel coat is knocked off. You can see the glass, but it appears good.
Thanks in advance. [Edited this post to remove ALL CAPS, a style that is strongly discouraged on this Forum--jimh.]
jimh posted 08-07-2002 10:07 AM ET (US)     Profile for jimh  Send Email to jimh     
Welcome to the forum. Please do not use ALL CAPS for your postings. ALL CAPS are difficult to read. Their use also implies a particularly unattractive "shouting" quality. I have edited your posting to remove the ALL CAPS.

MarineTex epoxy has been used by many to make successful repairs of small areas of damage. Typically it has been used to fill holes left by mounting screws.

WEST System epoxy is another material that can be used. If offers you the choice of mixing it to any consistency desired, whereas MarineTex comes pre-thickened to a particular consistency. If that happens to be the right consistency then you're in good shape. If you need thinner epoxy to flow into the repair area, WEST System is recommended.

JOHN W MAYO posted 08-07-2002 10:12 AM ET (US)     Profile for JOHN W MAYO  Send Email to JOHN W MAYO     
thanks for the info,
the large caps are easier for me to read, that is why i use them. but i will be glad to use the small letter if it really makes a difference.

Taylor posted 08-07-2002 08:59 PM ET (US)     Profile for Taylor  Send Email to Taylor     
Yes, John, I've done exactly that. Several times :) Nothing wrong with the product, I jsut kept putting my boat up on gravel beaches.

You can see some pictures of that in the thread on the keelguard at . Look at the bottom for my long post with the links to the pictures. In the keel damage picture the whiter material (not greyish tan gelcoat or the black bottom paint) is marine-tex.

Its pretty easy to apply marine-tex, just mix and apply with a putty knife. Smooth with a wet rag.

And if you find it hard to read what's in the browser window, try View... Text Size... Larger... Or Largest. That's what I do. (These instructions are for Internet Explorer... you might be running something different)

Taylor posted 08-07-2002 09:02 PM ET (US)     Profile for Taylor  Send Email to Taylor     
Opps... try
jimh posted 08-07-2002 11:12 PM ET (US)     Profile for jimh  Send Email to jimh     
Actually, all capital letters are much harder to read. If you want larger letters you can set your browser to produce any size font you like. The HTML coding does not control the display font size--your browser does. If you need the fonts to be larger you have simply to make them larger.

The reason all capitals are harder to read is that the shape of the letters is less unique. They all resemble the same squarish size, and provide few clues about themselves from shape. This is a well known fact. You never see books or other lenthy works set in all capitals--no one could stand to read them if they were printed that way. So please, spare us the all-caps and adjust your browser.

Sinclair7 posted 08-08-2002 01:28 AM ET (US)     Profile for Sinclair7  Send Email to Sinclair7     
I posted several questions about how to fill old screw holes in the past. Several times, I used epoxy and was happy with it. However, I recently tried marine-tex and found it easier to use. Using some advise I got at the forum, I used a counter sink to open up the screw hole. This left a nice beveled hole for the marin-tex to bond to. The cosistency of the marine-tex was good for this application and was cheaper than buying an epoxy system and additional additives to thicken it. Good luck and safe boating.
JOHN W MAYO posted 08-08-2002 07:57 AM ET (US)     Profile for JOHN W MAYO  Send Email to JOHN W MAYO     
Thanks to all for the help with the information and the experience you all have told me of the use of marine tex and other products for keel repair.

Taylor, the pictures of your repair are excellent.

Taylor posted 08-08-2002 02:11 PM ET (US)     Profile for Taylor  Send Email to Taylor     
Thank you. Wait till you see my latest photodocumented repair effort. Of course I'd rather be boating.
ratherwhalering posted 08-09-2002 12:04 PM ET (US)     Profile for ratherwhalering  Send Email to ratherwhalering     
hmmm. I almost feel invited to add a thought here. I used MarineTex to repair hull chip/scrapes, and it worked great. Applying gel coat over it is another story. MT (and all epoxy) are not the greatest bonding agent for gel coat, although West's has a solution (there is a great audio interview on this site). I strongly reccommend tinting the Marine Tex white too match the hull color.
JOHN W MAYO posted 08-09-2002 09:13 PM ET (US)     Profile for JOHN W MAYO  Send Email to JOHN W MAYO     
I purchased the White Marine Tex.....have not used it yet, but is the white tint that comes with the product pretty close to the color of the Whaler???

Would I need to put the gel coat over the marine tex or is it ok just to stand alone?

wezie posted 08-18-2002 09:07 PM ET (US)     Profile for wezie  Send Email to wezie     
MarineTex is great. It will fill and hold in the spot if the area is clean. Epoxy sticks well and is tough.
Gel coat is difficult to get to stick over epoxy.
Epoxy is not UV stable. MTex will turn from white to tan.
You can tint it, but it is difficult, and may not hold the color.
On the keel, the repair will most likely work, will be tough, but will probably show with time.
Practice a mix, 5 small mounds of filler with 1 equal mound of catalyst.
Epoxy is mixing sensative. More or less catalyst will not change the setting time, but may stop it all together.
Vinegar is a good solvent for uncured epoxy.
JOHN W MAYO posted 08-18-2002 10:20 PM ET (US)     Profile for JOHN W MAYO  Send Email to JOHN W MAYO     
Thanks for the addional info on your experience with this product. It will help me with the job.
george nagy posted 08-19-2002 11:47 AM ET (US)     Profile for george nagy  Send Email to george nagy     
I just used marine tex to fill my bow rail holes and some other below waterline transom mounting holes. It works great. If only they made a desert tan batch. The rail is really solidly mounted now.

I used a plastic spoon to mix and apply then sanded it flush. A dremel tool works great for grinding out small cracks in tight areas.

Good luck with your repairs.

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