Adhesives

Adhesive types used for glue down installations add considerable costs to any installation and there’s a reason for it. It works best! The characteristics of elastomeric adhesives include quick assembly, flexibility, variety of type, economy, high peel strength, ease of modification, and versatility. Though many OHJ readers are very familiar with the working characteristics of epoxy products like wood consolidants and fillers, epoxy adhesives are worth mentioning here because they fill many niches not covered by other adhesives.

The Sika AcouBond-System consists of SikaLayer-03, a 1/8” (3 mm) proprietary specially slotted foam mat, and the SikaBond-T53, unique permanently elastic, super strong, sound dampening adhesives that form a tenacious bond to wood flooring, plywood subfloors, concrete and other common subfloor materials. Never use cyanoacrylate adhesives (CA or superglues) except as a temporary bond – they always fail after a few years.

Compared to white glue, yellow glue is generally less prone to creep but still enough so that it is generally not recommended for structural applications for this reason. Synthetic adhesives may be made of amorphous thermoplastics above their glass transition temperatures; thermosetting monomers as in the case of epoxy glues and cyanoacrylates; low molecular weight reactive species as in the case of urethane adhesives; or block copolymers, suspensions, or latexes.

Today we’ll learn about the different types of glue woodworkers use, how to choose a glue that works well for your project, and my overall favorite glue to use, which may be a bit of an unconventional choice. Polyurethane adhesives are chemically reactive formulations that may be one-part or two-part systems and can be fast curing. Thinner cyanoacrylate glue does not bond more quickly nor form shorter polymer chains than the gel version when used on wood. Note in the example above, mineral spirits was used to lift some of Cocobolo’s oils off the wood surface: and you can clearly see the stained orange cloth as evidence.

Although two components are required, the early versions of these adhesives did not require mixing prior to application. Synthetic wood adhesives, also known as resins, are man-made polymers which resemble natural resins, but are created to meet specific woodworking needs. Anaerobic adhesives are often known as ‘locking compounds’, being used to secure, seal and retain turned, threaded, or similarly close fitting parts. The result is a wood glue we believe to be superior in many key performance criteria as defined by woodworkers. You can buy liquid hide glue (check the date on the bottle), or you can mix your own by adding flakes or granules to hot water.

Therefore, white glue can be thinned and cleaned up with water, is safe to use around children, dries clear, sets fast and, after presoaking, washes out of clothing. The inserted wood could be slotted in place like a dowel, or small screws which are resesed below the surface of the softer wood will hold it in place. If the joint is a good fit, any of the usual suspects will do, as with sufficient clamping pressure, you should be able to bring the glue lines closed. The use of alcohol reduces curing time and provides better wetting of the wood surface.


The properties of this glue are, strong strength, waterproof, Excellant for bonding wood to almost any other materials, good gap filler. To help sort out this broad industry, here’s a primer on the basic adhesives types you’ll find at good hardware stores, and what you’ll need to know about them for bonding around your old house. Workability in that they are much harder to spread compared to water based or acrylic adhesives. Yellow glue cures overnight, cleans up with water (while wet), dries to a yellow, and is nontoxic. Obviously, this boiling and heating test is much more severe than any glued wood product that we make will see in its life.

It is designed to work with wood and is immediately tacky for better hold in the uncured state. Because of the low process temperatures and very rapid polymerization (from 2 to 60 seconds), ultraviolet-cured adhesives are making rapid advances in the electronic, automotive, and medical areas. Thermoplastic resins employed in adhesives include nitrocellulose, polyvinyl acetate, vinyl acetate-ethylene copolymer, polyethylene, polypropylene, polyamides, polyesters, acrylics, and cyanoacrylics. You can buy super glue in a variety of viscosities which enable some leeway in gap filling performance.

This large group of adhesives uses many polymers (acrylics, rubbers, polyurethanes), together with plasticisers and tackifying resins to form a permanently tacky (sticky) adhesive. In the case of perpendicular gluing, first determine the weight of the wood and adhesive involved in a given charge and multiply this value by the specific heat of wood (0.45). Also, while many adhesives are in liquid or paste form, cement adhesives may come in powdered form and are mixed by hand before use. Polyvinyl Acetates are very versatile and are relatively fast drying but excess glue must be wiped away after applying or it is very difficult to remove when dry.

The activator is in an aerosol can that one spray on. Just keep some Cutex remover or acetone handy to unstuck your fingers and wipe off unwanted glue with a damp cloth – damped with the lacquer thinners which contains enough acetone to dissolve the glue. Titebond Original works sometimes but the Titebond II and III are exterior woods and tend to expand over time creating a raised glue joint. I once did a glue up without thinking on a winter day and ended up with a chalky mess.

These adhesives provide modest strength compared with most other types, but they form a vital component in rapid manufacturing processes which are devised and controlled to very high engineering standards. First though – and here’s the ‘dry’ bit – there are two standards for adhesives that concern us: BS EN 301 (structural adhesives) and BS EN 204 (non-structural adhesives). Titebond liquid hide glue uses ammonium thiocyanate and dicyandiamide, which sound much more scary than they are.

Clean-up: For easy removal of adhesive from equipment, clean up while it is still wet with warm water (this includes the glue roller and pans). The term animal glue usually is confined to glues prepared from mammalian collagen, the principal protein constituent of skin, bone, and muscle. Apply a thin bead of wood glue along one bonding edge and clamp together until the glue has set. That is because PVA makes incredibly strong joints on unfinished raw wood, but in the process clogs the wood pores. I went through the very scientific approach of picking a glue by watching as many videos as possible of woodworkers, and paid attention to what color the label was on the glue bottle they used.

The dielectric or radio frequency heating equipment available today for wood gluing purposes is a highly engineered apparatus that contains all possible safeguards to make the operation a safe and easy one. Consensus of testing seems to be that’s a safety factor of 4 to 8 (we all know just how homogenous any given piece of wood is.) Anyway, that means ultimate failure ought to be expected around 1800 psi or less.

They appear to make no claim to compliance with BS EN 301 and this may be because they are not specifically wood adhesives. Flashing off The process of encouraging the escape of solvents in solvent-based adhesives so as to speed setting—for example, pulling apart two pieces just after applying adhesive, then reassembling them minutes later. All variables must be taken into consideration when choosing the proper glue or adhesive to be used. It usually starts at either the top or bottom edges of the glue joint and follows to the opposite side. Thermosetting adhesives include urea-formaldehyde, phenol, resorcinol, melamine and epoxy.