In article , W. D. Grey
wrote:

How is it used to make line sink ?

No idea. I make my own from fuller's earth with just enough washing up

Am I correct in think it is only to the leader you apply the
Mucilin/Fuller's earth concoction?

Depends what you're trying to do. Sometimes a nominally sinking line will
pick up so much gunk (especially in hot weather) that it floats when casting
short - a sort of self greasing effect. Then a degrease and clean restores
it. If you're fishing a floating line and want to get the leader down then,
yes, just degrease the leader.

It can be worth cleaning the line even if it's still sinking ok but is, say,
sticking in the rings.

Cheerio,

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