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Old 10-20-2012, 12:54 PM   #1
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Sealing crack in plastic utility sink


Hi,

I have a plastic utility sink with a 6 inch long cut or crack in the basin (not at the drain). If I have anything with some weight to it in the sink it will cause water to leak through the crack when running the water.
Is there any way I can seal this crack, perhaps some type of caulking or sealant along the crack both inside the sink and underneath?

Thanks
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Old 10-20-2012, 01:03 PM   #2
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Sealing crack in plastic utility sink


I noodled on this, and it would seem your biggest issue will be keeping any kind of seal when the weight of the water flexes the sink.

I'd be tempted to try a repair using 100% silicone caulk - it comes in white, clear and black (and maybe a few other colors). Be sure you thoroughly prepare the surfaces, and I'd recommend using a dremel wire brush bit to rough up the seam edges both top and bottom. Wipe them with rubbing alcohol just prior to applying the silicone so you can be sure no soap residue remains to affect the bond.

Then apply a nice thick bead to the bottom, and a decent but not grossly oversize bead inside the sink. Let it dry per instructions on the tube.

Be sure it is 100% silicone, and you might have a chance. Silicone will flex without tearing, and in my experience will bond to darn near anything. If you can fabricate a brace for the bottom of the sink to prevent flex it would really help, regardless of what you use to seal it.
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Old 10-20-2012, 01:10 PM   #3
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Sealing crack in plastic utility sink


JB WELD seems like a good choice for this project.
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Old 10-20-2012, 02:12 PM   #4
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Sealing crack in plastic utility sink


As cheap as those tubs are, you would be better to just replace it alltogether.
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Old 10-20-2012, 03:04 PM   #5
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Sealing crack in plastic utility sink


Drill a hole at both ends of the crack,then use epoxy on both sides to seal the crack,the holes are to keep the crack from going any further.
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Old 10-20-2012, 08:33 PM   #6
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Sealing crack in plastic utility sink


replacing it is the only real way to fix it.....ben sr
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Old 10-21-2012, 12:11 PM   #7
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Sealing crack in plastic utility sink


Thank you for the suggestions. I will compare silicone caulk and JB Weld and try one of them. If that fails then I'll replace the sink.
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