Before I trim off the extra nettle and hemp I need to seal it to prevent the possibility of the knots coming undone. Not likely that could happen, but sometimes even when sticks should be dry they can still dry more. The drying can cause shrinkage and even if the knot is intact the binding might be too lose for the bundle. Using a sealant of sorts can help to keep things in place.
When I am using fiber without the addition of stones I often use liquid starch. I like that the starch does not seems to cause a problem if I add other materials–wax, stain, shellac…
I read about using the no wax floor shield several years back in Carol Huber Cypher’s book, Hand Felted Jewelry and Beads: 25 Artful Designs.