Author Topic: Water proofing balsa hulls  (Read 5682 times)

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Offline derekwatson45

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Water proofing balsa hulls
« on: 18 May 2015, 13:38:36 »
Need a bit of advice on how to waterproof the hull of a balsa model I have been given. I have read various articles which talk of Dope!!! and or sand sealer. I have been putting the model together with a waterproof PVA which also states that diluted with water will provide a good waterproof coat prior to any painting. Any help/advice would be appreciated. On a brighter note Bismarck and the Sovremenny are going well. 

Offline colin

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Re: Water proofing balsa hulls
« Reply #1 on: 20 May 2015, 05:14:41 »
you have just about covered all the Options that i would or could recommend... Sand Sealer and Dope, Diluted PVA..
there might be a few more Options but the only one that springs to my mind, is... Diluted Fiberglas resin, or some sort of Diluted epoxy..  ^^^

Offline Mark

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Re: Water proofing balsa hulls
« Reply #2 on: 21 May 2015, 10:28:28 »
Have a look at Eze Dope, you can dilute it easily and apply think coats by brush or air brush (clean it well afterwards though)

Offline Dennis

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Re: Water proofing balsa hulls
« Reply #3 on: 23 May 2015, 22:43:10 »
I have used the epoxy (west system) diluted with lacquer thinner before, works well because epoxy resin is great for underwater applications. Stay away from polyester resin though not good for anything under the water, it will blister.

Offline derekwatson45

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Re: Water proofing balsa hulls
« Reply #4 on: 26 May 2015, 15:17:30 »
Thanks guys. Should be in a position to waterproof in a couple of weeks. Model is coming on well.