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Sealant suggestion for fullcover GPU waterblock(between copperblock and acetal top)

post #1 of 5
10/1/12 at 12:58am
Thread Starter 
Hi! I making a project at school, it is fullcover waterblock for non-reference HD 6950, now I got 300ML Marine Sealeing tube, specs -40 - +90.
I have much wallspace, also goin to make small pool for sealant with milling machine both in copper and acetal.

Anyone have better suggestion on easy DIY GPU sealant? Thanks
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post #2 of 5
10/1/12 at 3:52am
Use an "O" ring.
http://en.m.wikipedia.org/wiki/O-ring
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post #3 of 5
10/1/12 at 8:10am
Thread Starter 
OK. Thanks.
But I got a problem, my custom water block are 90mm x 80mm(3.543"x3.149"), so I do need o-ring length around 325-327mm(12.83")
I have found 320mm o-ring 8.6mm(3.38") thick, but it's too thick, little bit too short, and costs me about 10usd shipped to here. Any other suggestions, prefer material from a tube like liquid rubber, silicone etc. But I don't know what is best and cheapest to use.

Maybe some kind of gasket?
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post #4 of 5
10/1/12 at 9:47am
RTV Blue is known as the "gasket maker." You can try that.

If you can find some fairly thick gasket material, you can make your own gasket. You really want to punch out the mounting holes, though, and not cut them out. An auto supply store may have gasket material. Cork will work.

If you want the ultimate in cheap, a manilla folder can be used to make a gasket. My dad did this once with the head on a leaf blower. I'd recommend something thicker, though, for a DIY sealing surface, even if milled.


Be aware that, in order to seal properly, you are going to need a lot of screw points along the mating surface, especially when one of your materials is something as bendable as acetal. Remember to tighten your screws from the middle out.
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post #5 of 5
10/3/12 at 12:11pm
Thread Starter 
OK, thanks!
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