G5 Outdoors G5 G-Lock Blu-Glu Adhesive Blue. Blue formula makes it easy to see and identify excess dripping and will dry practically clear. Not for use with hidden insert systems. Specifications for G5 Outdoors G5 G-Lock Blu-Glu Adhesive: Manufacturer: G5 Outdoors Color: Blue Package Contents: G5 Outdoors G5 G-Lock Blu-Glu Adhesive Provides solid yet flexible bond that is ideal for installing inserts and fletching and provides instant adhesion in seconds. Blue formula makes it easy to see and identify excess dripping and will dry practically clear. Not for use with hidden insert systems.