An established product Power Gum is a clear, elasticated gum that is used by anglers to form line friendly stop knots and back stops.
If a small tag is left protruding from a Power Gum stop knot, split shot can be attached to this to avoid possible line damage.
Power Gum can even be included in terminal rigs to act as a shock absorber.
An extremely versatile product. Available on 5m spools in 7lb, 11lb and 22lb.