All of our adhesives have very little vapor, which is good for you and your customers. With new client glue, always test on a small area of their skin first to see if an allergic reaction to the glue occurs. Do the same if you have replaced the glue and are using it on the customer for the first time. You should also know that the skin test is not 100% reliable and does not guarantee that the client is not allergic to the glue. If the customer has had problems with sensitivity and allergic reactions to the glue in the past, they will probably have them when using our glue. All of our adhesives contain cyanoacrylate, which is an allergen. However, there is also the possibility that the customer is allergic to the pigment in the glue. In this case, choose a transparent pigment-free adhesive.