Old Brown Glue is a liquid hide glue. OBG is a protein glue for wood, furniture, veneer, lamination and instruments. Woodworkers and luthiers use Old Brown Glue because of its versatility, long open time and its ability to replace the need for a glue pot. OBG has a reversible bond, is not affected by solvents and is transparent to stains and finishes. Old Brown Glue has superior strength and unlike synthetic glues which rely on mechanical adhesion, OBG has a strong molecular bond to itself in addition to mechanical adhesion. Old Brown Glue is the perfect glue for antique restoration, veneer work, lamination, instrument and chair making as well as modern woodworking. Since it is an animal protein collagen it is organic and non-toxic. OBG cleans up with cold water.