sup yall,..... so after reading the instalation manual for my duratech pipe system ..... no where in it says to put silicone around the twistlock part of the pipe. only put some just around where the storm collar sits on the flashing.. I thought I read on here that you put a bead around the joint of the pipe..... also what kind should I use and where to get it,... i was at lowes last night and could not find the right stuff...thanks all.