[TowerTalk] Sealing cables at PVC exit?

[Paul Ferguson]

I am using buried 4-inch PVC pipe to run coax and control cables from 
shack to tower base. The PVC come out of the ground, turn horizontal, 
and end a foot or two above the tower base. The cables will exit the 
PVC, take a small drip loop, and get routed onward.

What is the best way to seal the end of the PVC around the cables? I 
thought about using a PVC end cap and drilling holes, but adding a 
future cable would be difficult. I am interested in hearing what 
creative solutions others have found.

73,
Paul
K5ESW