Wood glue and many other adhesives for our projects.

Wood glue and the gluing operation is a very important part of any woodworking project. It doesn't matter how much effort and time we put into the fabrication of our projects because the success of the end result of the project will depend not only how well it goes together but perhaps of more importance how well its stays together.

With the proper wood glue we can have great lasting joints that can be stronger than the wood itself if the wood glue is properly selected and applied.

There are a unlimited selection of glues and adhesives to choose from depending only on the nature and special charactoristics of the job. All variables must be taken into consideration when choosing the proper glue or adhesive to be used.

The time it takes for glues to set up varies from one glue to the other.If we are working on a small project a quick setting glue is suitable for the job, however if the project is large or complex the glue could dry on one part while we are still applying glue to another piece. This in turn can be disastrous because it can cause joint failure where as the glue did not bond.

The choice of wood glue will be influence by the type and quality of a joint. There are instances when our joints may need a glue that has a good gap filling property to insure a good closed joint.

Water resistent and waterproof glues have different charactoristic also. A boat that has been built with water resistent glue instead of water proof glue would not stay afloat for long. The name itself implies the very purpose of the glue, ex: water resistent means that it will resist water for a period of time, waterproof means exactly what it states.

Tempertures is another factor to take into consideration when choosing a glue. Some glues has a low tolerance to heat or extreme cold such as a polyvinyl resin (white glue) will become soft at temperatures of about 170 degrees. This would make this particular glue a bad choice for gluing anything that would be exposed to a high temperature.



Some of the types of glue.

POLYVINYL RESIN GLUE This is the well known "white" glue used widely for general woodwroking. This glue generally will come in squeeze bottles ready to use. The properties of this glue are quick setting, non water resistant, dries colorless leaving an invisible glue line, tends to soften at high temperatures, good strength, some what good gap filling properties.

HIDE GLUE An old fashion animal glue that is made from hides, hooves, and the bones of cattle. Still use somewhat in the furniture industries in some glues, it was very popular for professional cabinetmakers for years. The properties of this glue are very strong holding strength, slow setting, non waterproof, good gap filler

PLASTIC RESIN GLUE This is a urea- formaldehyde glue that is in powder form. It must be mixed with water before it can be used. The properties of this glue are, strong strength, water resistant, is not a good gap filler, non-staining. set up in 4 hours.

ALIPHATIC RESIN GLUE This glue comes in a plastic squeeze bottle ready to use and mainly is cream in color. The properties of this glue are, very strong strength,sets in less than a hour, non water resistant, good heat resistant.

CASEIN GLUE This glue is made from milk curd and is available as a tan power taht must be mixed with cold water to a heavy cream consistency.The properties of this glue are,strong strength, use at any temperature above freezing, non waterproof but is water resistant, can stain some woods, not a good gap filler.

REORCINOL RESIN GLUE A completely waterproof two component glue that consisting of one container of liquid resin and one container of powder catalyst. The properties of this glue are, extremely waterproof, very strong strength, quite expensive, slow setting, leaves a dark glue line, good gap filler.

EPOXY RESIN ADHESIVE This is a two part resin and catalyst adhesive that when combined will make a strong bond. The properties of this glue are, strong strength, waterproof, Excellant for bonding wood to almost any other materials, good gap filler.

CONTACT CEMENT This is a neoprene rubber based liquid that is ready to use. It is used by cabinet makers to bond plastic laminates sheets to counter tops. It is applied to both surfaces and allowed to dry for about 30 minutes before assembly. These parts will bond immediately upon contact thus giving the name contact cement.



Preparation and application:

All workpieces should be clean and free of debris such as dust or other matter which would interfere with the bonding process. Test and pre check all joints before gluing.

Apply a even amount across the surface of the area to be glued being careful not to over glue because excess will sqeeze out and need to be cleaned off.

Even though you can't see any glue on the exterior workpiece if it is not properly cleaned and sanded the finish you use may show the hidden glue.



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