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  #1 (permalink)  
Old 08-20-2010, 01:15 PM
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Default Separating Two Siliconed Pieces

Hi all. I have a cast expansion tank where the top and bottom are siliconed together and I need to separate the two. The silicone is "super stuck" and I don't want to try driving a wedge between the two for fear of damaging one or the other. I tried heating with a propane torch, but that didn't make a difference. If anybody has any ideas I sure would be grateful.

Drive safe.

Rick
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Old 08-20-2010, 01:37 PM
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Go to the paint store and get a wooden-handled, flat blade scraper, 2" wide or less. Sharpen the edge to a knife point on a stone and work it into the seam. Then push it all around the circumference.
It's my favorite gasket tool.
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Old 08-20-2010, 01:52 PM
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Originally Posted by RLSIDWELL View Post
Hi all. I have a cast expansion tank where the top and bottom are siliconed together and I need to separate the two. The silicone is "super stuck" and I don't want to try driving a wedge between the two for fear of damaging one or the other. I tried heating with a propane torch, but that didn't make a difference. If anybody has any ideas I sure would be grateful.

Drive safe.

Rick
Rick,

Silicone HATES gasoline......so in a safe place outside just soak it in gas and in will start hollerin' in a matter of minutes........peels off like bad tape!!

NO SMOKIN' WHILE DOIN' IT!!!
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Old 08-20-2010, 04:10 PM
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Try monofilament fishing line and use it like a bandsaw blade to saw the RTV between the parts
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Old 08-20-2010, 06:36 PM
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("Try monofilament fishing line and use it like a bandsaw blade to saw the RTV between the parts")
E Wood


string will work, flax or nylon

Dwight
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Last edited by Dwight; 08-20-2010 at 06:38 PM..
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Old 08-20-2010, 07:19 PM
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("Try monofilament fishing line and use it like a bandsaw blade to saw the RTV between the parts")
E Wood


string will work, flax or nylon

Dwight
Even Dental Floss works.
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Old 08-20-2010, 08:08 PM
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Even Dental Floss works.
Dental floss works better than fishing line because it has a texture. Especially the unwaxed stuff.
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Old 08-21-2010, 02:38 AM
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You still have to get it off of the two pieces so a petroleum solvent will still have to be used....kerosene might even work but gasoline is very fast!!

I removed 30 feet of "silicone seam" from the gunwale of my boat with gasoline....piece of cake!!
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Old 08-21-2010, 04:36 AM
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Stick your face between them and Motorboat them.


Never mind. I was confused there for a minute.
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Old 08-21-2010, 05:07 AM
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Stick your face between them and Motorboat them.


Never mind. I was confused there for a minute.
Whew!! Thank you Silverback,

For a minute there I panicked that 392 and the crew had lost there youthful mirth.
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Old 08-21-2010, 07:45 AM
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Soak it in denatured alcohol.
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