Best knot

Hi all

I am adept at using the classic clove hitch for tying off QM to visco or QM to QM etc etc but I've found it a bit slippy for tying visco on to visco.

I'm chaining a bunch of visco fused items to some fast visco and no matter how tight I pull it the visco can slide up and down the other. I wondered if there was another equally quick knot people use that is better when you want a more secure grip.

This is the one I use.