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ipass9
Mar 15, 2007, 5:27 PM
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Registered: Oct 17, 2004
Posts: 40
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Just wondering if anyone has put a little PL400 in when bolting with expansion bolts? i was talking to a millwright at my work and he said he put a little on when he uses them. i thought it might not be a bad idea, its doesnt expand, i thought it might be a good insulator and you could still pound it in and cover it if you had to.
hmmmmmmm ...anyone !!
PL400 is and acoustic glue
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brent_e
Mar 15, 2007, 5:38 PM
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Registered: Dec 15, 2004
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I don't quite understand what purpose the PL is going to fulfill? you use the word insulator, but from what?? Rust? Are you thinking it will make the bolt stronger?
why PL 400???
PL premium seems to be a better product if you were going to use anything (it's urethane). 3M 5200 Marine sealant is a better product, still (another urethane - it's amazing stuff). It has great adhesion to almost anything but takes 7 days to cure.
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ipass9
Mar 15, 2007, 5:56 PM
Post #3 of 5
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Registered: Oct 17, 2004
Posts: 40
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ya i was thinking as an isulator from the winter freeze thaw cycles.
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redpoint73
Mar 15, 2007, 6:15 PM
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Registered: Aug 20, 2002
Posts: 1717
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My understanding is that sealing an expansion bolt is usually a bad idea. Rock is porous (some rock is VERY porous), and you will trap as much water in as you keep out. Better to leave the bolt unsealed and let it drain naturally.
You will see expansion bolts with caulk around the outside, but I read somewhere (don't remember where) that this is actually a bad idea for the same reason.
That said, I've drilled an expansion bolt into rock exactly zero times in my life. So there are plenty of experienced route developers that can speak to this.
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