umm there is concrete in the conduit... Page 2 ...
Jan 30, 2015· When chico (explosion proof sealing cement) gets stuck in a conduit preventing a wire pull, a lot of times you can put vinegar in the conduit. The vinegar has the ability to break down the chico, if not too much, after a few hours. Just one of those "I didn't see that in the manual"..tricks.