sealant for wires that enter a rubber house roof

Question

I have a rubber roof on 1/2 of my house.  Where the wires for the tv antenna enter the roof, there is often a leak.  I used one type of sealant that was applied with a caulk gun many years ago that worked, but I forget what it was called.  I tried Gen Tite rubber roof lap sealant and that cracks and generally doesn't work.  What do you recommend?

Answer 1

sorry the butyl iquid rubber would not work on that type of application

Thank you