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Old 05-25-2013, 06:33 AM
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Default Does MEK harm (old) gelcoat?

Parts of my 20-year-old new-to-me boat have some kind of residue on them that acetone is not dissolving but MEK is. (The MEK is also dissolving my rubber gloves.) Is MEK safe to use as a cleaner on gelcoat? Any other recommendations ?

Thanks,
-Scott
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Old 05-25-2013, 06:46 AM
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MEK is a VERY strong solvent and degreaser. It will remove just about anything including mold release agents and Wax. Wear protection. Im not sure what type of cleaning you are referring to.
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Old 05-25-2013, 07:10 AM
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Simply put MEK is a stronger solvent. Both are known as polar solvents with MEK being stronger. It also drys slower, but both are flammable and toxic in large doses.
MEK will attack gelcoat while acetone has a much lesser effect.
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Old 05-25-2013, 05:36 PM
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Quote:
Originally Posted by CB Haws View Post
...
MEK will attack gelcoat while acetone has a much lesser effect.
So I shouldn't use MEK as a cleaner for gelcoat then? What I'm trying to clean is some kind of residue that is around all the windows - it's like whatever they used to try to seal the windows dissolved and spread out all over the gelcoat. When I rub it with a little MEK on a rag it comes off. Acetone doesn't work at all. Neither does denatured alcohol or any of the normal cleaners (like bleach, simple green, bartenders friend, etc.) I haven't tried lacquer thinner yet.
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Old 05-25-2013, 05:55 PM
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No you can use MEK just do not let puddle up or sit in a pool on the gelcoat.it will soften it in time. Wipping on and off is no problem.
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Old 05-26-2013, 06:52 AM
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Just make sur you follow up with some wav
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Old 05-26-2013, 08:40 AM
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Respirator!!!!!!!!!! Shit is toxic as hell
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Old 05-27-2013, 07:49 AM
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try nitrile rubber gloves
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