What is a polyurethane adhesive?
Polyurethane adhesive is a type of adhesive used in various commercial industries, as well as hobbies and crafts. Although it has been available in Europe for years, this type of adhesive is a relative newcomer to the American market. In fact, the first polyurethane adhesive product was not easily available in the US until the early 90s. Today it can be found in most hardware offerings and is commonly recognized by Excel ™ and Gorilla Glue ™ trade names.
Although this adhesive bears a descriptive term "polyurethane", it has little to do with similarly named surface treatment. However, some polyurethane adhesive formulations can function as a sealant. For example, a gel form is a type that is often used in building and repairing light aircraft. Other polyurethane adhesive include wood, metal processing and masonry. Polyurethane adhesives on the construction can be used with a composite deck, floor and concrete.
There are several advantages of using polyurethane adhesive on yiná glue. For one thing is suitable for indoor or outdoor use and is highly durable. In fact, some brands of polyurethane adhesives ensure that the binding will take as long as the materials that are connected together. In addition, unlike many other adhesives of this type, it is applied directly from the container and may not be mixed. Most varieties of polyurethane adhesive can also be painted.
The strong adhesive factor from this adhesive stems from its foaming effect when it comes into contact with moisture, which means it expands during treatment. This also suggests that a slight fogging may be necessary on one surface to be glued if the material already contains a small percentage of water vapor (ie wood, stone, etc.). From the adhesive foam, there is temptation to wipe or chop the adhesive during treatment, but this is actually counterproductive. In fact, any excess adhesive is easier to removeby grinding or scratching after cure. In addition, only a small amount of adhesive is needed and only one surface should be applied.
Like other adhesives, polyurethane adhesive has a limited life, usually six months to one year. However, it will take longer if it is cooled. It is also necessary to realize that because this type of adhesive reacts with moisture, it will also respond to moisture to the skin. Therefore, it is good to wear gloves while working with it.
One more security objection: polyurethane adhesive should be kept out of the reach of pets and children. As with the skin, the properties activating the moisture of this adhesive mean that it can swell and cause the intestine to block.