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Contact adhesives are products used for the repair or construction of wood, metal, fiberglass and ceramics. They offer the advantage of high strength. The materials involved can be wood, metal, ceramic, plaster or fiberglass. https://bestreviewstips.co.uk/contact-adhesives_9289/ They are usually based on polymers which exhibit the property to bond chemically with themselves as liquid adhesives. To be able to join them, a strong bonding agent is needed which is usually in the form of a liquid, but can also be in the form of a powder. Both the surfaces to be joined must be coated beforehand and then the adhesive must be allowed to dry.<img width="465" src="">Contact adhesives are manufactured by three manufacturers namely Talalay, Thermoform and Minnetonka. These brands tend to produce glue that has a higher molecular weight. It is also denser than natural rubber and therefore more suitable for use in bonding applications where a fine level of density and tackiness is required. This feature makes them ideal for joining metal and plastic. However they are less preferred for joining wood, ceramics and composites.One of the most important characteristics of contact adhesives is their thermo-plasticity. This property enables them to bond surfaces of different hardness at the same time as being able to soften the bonding agents applied on the surface. They also have high absorption and solubility properties and therefore good resistance to alkalis and acids.As discussed earlier, woodworking uses contact adhesives extensively. The main article of woodworking is the piece of wood or metal that we use to build our projects. This is where the real work is done. Therefore it is vitally important that we know how to properly align the pieces of wood or metal while we are building our projects. Otherwise the project will fail and be a big waste of money.There are two main types of contact adhesives - water based and volatile organic or flammable solvent based. The water based are more flexible and give a smoother and better finish. The flammable solvents based adhesives tend to give a faster drying time and are more suited for bonding aluminum and stainless steel. As you can imagine, if you are doing a lot of welding or fabricating you will most likely be using the flammable solvents based adhesives.Another major use of contact adhesives is for applying sealants to both metals and wood. Sealants can be either a liquid or a powder. Water based sealants tend to give a more glossy finish and are excellent for surfaces where gloss is important. They are also excellent for use on things like metal laminates and polymers. Polymers are used mainly for things where a high gloss finish is required, and polyurethane is used for curing cured fabrics, curing paints and applying coatings.A final topic we will discuss here is the different varieties of material available to us when it comes to using contact adhesives in applications we may not have thought about. One of the most common types of contact adhesives is polyurethane. This is the most commonly seen variety of adhesive and has been around since the 1950's. These are usually applied as flooring glue and are available in a variety of colors and finishes. They are excellent for bonding metal surfaces and are very pliable and light weight.Flammable solvent-based adhesives are also widely used and come in a wide range of qualities. As the name suggests they will release flammable liquid when applied, and are ideal for use with flammable solvents. Water-based adhesive however are more commonly seen in applications where a higher gloss or matte finish is required and used to bind acrylics, plastics and textiles. These types of contact adhesive are usually coated with an inert material such as silicon, rubber or some kind of thermosetting polymerizer that prevents them from bubbling or burning when heated.