Greetings. I had a blockage on one side of my kitchen sink with 2 compartments. The side with the garbage disposal was blocked. The pluming under my sink is black plastic.........I tried the plunger plus baking soda and vinegar and both did not work. So...........Genius that I am ( LOL) I took the pipes apart underneath the sink and found the blockage in the pipe that went between the 2 drains...........It is all cleaned out.......My big question is that tomorrow morning when I attempt to put it all back together ...Do I need to seal the pipes with silicone as I rescrew the pieces together...........Any advice appreciated.......................... My plan is to take a short video on my I Phone and ask at Loews or Home Depot........and get some advice......I was so determined to fix this myself and not have the plumber come out.Even If I screw up ........I dont mind as I want to show myself that I can fix this!!!!!!!!