There is an assortment of glue types available to buy on the market, the majority of which are synthetically manufactured. Certain adhesives, such as white craft glue, are water-based and can therefore be removed with ease by using some warm water. Superglue (also referred to as ethyl cyanoacrylate), on the other hand, is a very strong and fast-acting glue that is significantly harder to remove. Wood glue (also known as polyvinyl acetate or PVA) is also a very strong glue. Certain wood glues are also made from animal by-products which are much like gelatin.