Silicone removal from fiberglass? - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 11-10-2013, 12:49 PM   #11
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Re: Silicone removal from fiberglass?

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There is a product out there that is called Siligone ll or something along that name made by Dow Corning, I think. There is another call Silicone-Be-Gone made by DAP. Would definitely not use acetone. Another important thing is this polyester or epoxy fibreglass .
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Old 11-10-2013, 02:19 PM   #12
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Re: Silicone removal from fiberglass?

Originally Posted by Cross Check View Post
Silicone is a bitch to remove !
I don't know of any solvents that will help.
It has to be done 'mechanicly' by scraping/grinding/wire brush etc.
(The wetsanding of it is good for exterior gelcoated surfaces)
Pretty much all solvents you can buy retail are CARBON based and will not work on silicone. (although they may help a little by swelling it)

IIRC back in the day we used an ACID to remove silicone based adhesives.

alkylbenzenesulfonic acid?

Good luck on the wet sanding because adhesives are designed to creep in to the pores of the material.
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Old 11-10-2013, 10:42 PM   #13
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Re: Silicone removal from fiberglass?

I've glassed over a couple of wooden hulled boats, and have some composites training from my AME-Structures course. Also have worked in a composites distribution center.For the most part i'd suggest physical removal of the Silicon. Leave the acetone alone until you are ready to do a final wipe off.

Try what Cross Check suggested. You might even have to grind out and replace the glass/resin in affected areas. What ever you do, do not have any sparks or open flame when you have the acetone on the go-my theory is there will be a BIG bang!
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Old 11-13-2013, 04:33 PM   #14
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Re: Silicone removal from fiberglass?

I have had good success so far with DAP silicone remover. I found it at the local Canadian Tire. It takes 2 hours to work and multiple coats to remove large areas, but seems to be working, albeit slow. I will update when I have it finished.

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