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Contact adhesives have been around for literally hundreds of years. The first recorded use of contact glue was in 1490 AD by the Spanish conquistadors. Today, they are still used extensively in construction projects and in arts and crafts. This article is written to introduce contact glue and its uses in woodworking and other hobbies.Contact adhesives are multi-functional adhesives that bond two surfaces together by overlapping their bonding pads. There are basically two types of these adhesives - liquid and paste. Liquid adhesives usually come in thicker consistency and are more viscous than the paste variety. Paste varieties allow bonding of thinner materials and are considered easier to work with. The more popular types of these adhesives tend to be liquid and paste adhesives that tend to bond more tightly to their surfaces than the other kind. Also called glue sticks, these are widely used in home improvement projects, woodworking and craft hobbies, and automotive and aircraft industries.Most people use contact adhesives on a daily basis. In addition to providing a very fast and reliable method of securing two surfaces together, they are also used for a variety of bonding processes and as a means of drying time. Most solvents used to create contact adhesives have evaporated during the curing process and need to be replaced with new solvent evaporation agents. Solvent evaporation is a general term that describes the process by which solvents or their vapors are evaporated from a solution or medium.Contact adhesives can be classified according to their chemical makeup. The most common type of adhesive is water-based which is comprised primarily of urea formaldehyde and phenol carbolic acid. In addition, urea formaldehyde is often mixed with formaldehyde to increase the strength of the bond. Other types of contact adhesives include acetone, methylene chloride, propylene glycol, and ethylene oxide gels.Solvent evaporation leads to the loss of solvent molecules and therefore lowers the drying time of the adhesive. Thus, urea formaldehyde based bonding agents such as acrylics, polyurethane, and melamine are used to prevent surface damage during bonding. Acetone is often mixed with water to improve drying time and is often used to speed drying times of contact adhesives that are used for bonding metal parts.Solvent Evaporations cause most fire accidents involving construction equipment and materials. The most common fire accident involving contact adhesives is caused by the improper use of such adhesive. For example, when using dry ice to ice a poster, a homeowner may accidentally close the lid of the refrigerator while it was still inside the freezer. This caused the plastic to melt and became very brittle and may cause the poster to be ripped apart. A similar situation happened when a homeowner closed his freezer door during a cooling process and the air in the freezer became too warm. https://bestreviewstips.co.uk/contact-adhesives_9289/ The excessive heat caused the glue holding the poster together to expand and cause the poster to collapse.Many construction and maintenance workers suffer from contact allergies when working with solvents and other flammables. One way to avoid this problem is to use an appropriate breathing mask, such as a mask with an integrated airtight ventilation system. If the worker does not wear one, the best solution is to wear goggles to protect the eyes. Using a water based contact adhesive with an appropriate strength level and correct applications is an easy way to make sure that the worker is protected from the risks of exposure to flammable solvents and other dangerous substances.Most rubber products are not suitable for contact adhesives application because rubber is a petroleum based product. However, a wide variety of glue types are available that do have rubber properties. Such glue types include epoxy glue, polyurethane glue, thermoset glue, acryl glue, polystyrene, polycarbonate, UV curing glue, and silicone glue. A good rule of thumb is to use glue of at least 20% rubber based in order to ensure the long term durability of the cover.<img width="474" src="">