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September 2002 - Sticky Stuff |
Every tool
has a specific function and glue is no exeption. Choosing the
right adhesive is a crucial building step. Here are some basic
choices:
[1] Yellow
and type II: these classic glues are fine for most woodworking
projects (use type II for outdoor ones). Both allow five minutes
of adjustable open time before the glue starts to bond. Type
II glues are water-resistant—not waterproof.
 [2]
Hot-melt polyurethane: use on hard-to-close or gap-filled joints.
You’ll have about a minute of open time.
[3]
Cyanoacrylate (super glue): perfect for assembling small, hard-to-clamp
pieces of the same material. It hardens immediately. Wear goggles
and gloves.
[4]
Two-part epoxy: a good choice for joining two different materials
or filling gaps. Spread on a thick layer, then clamp. Slow-bonding
epoxy has an hour of open time whereas fast epoxy has an open
time of only a few minutes.
[5] Caulking:
ideal for joining smooth surfaces like metal and plastic.
[6]
Construction adhesive: for sealing cracks and small holes. Also
good for attaching drywall onto studs, foam onto concrete and
tile onto plywood.
[7]
Polyurethane: great for binding oily woods and nonporous materials.
Unlike most glues, poly requires moisture to cure, making it
ideal for joining wood that isn’t totally dry.
[8]
Contact cement: choose for bonding laminates and large, flat
surfaces. Pieces adhere immediately; however, because contact
cement is made of synthetic rubber, it never completely hardens.
—Jay Somerset
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