Poor Representation\n\n The issue first became apparent in "Despair" when Castiel declared his love for Dean shortly before being killed by the Empty. Viewers half-joked, half-bemoaned that as soon as Castiel came out, he died, and this is a common occurrence in film and TV.

Formaldehyde, also known as methanal, is an organic chemical compound and belongs to the aldehyde group of substances. Due to its versatile applicability, it can be found in a large number of different products. It is mainly used as an adhesive and binder in the construction materials and furniture industry.

Adhesive Bonding is the process of joining two surfaces together, usually with the creation of a smooth bond. This may involve the use of glue, epoxy, or one of a wide range of plastic agents which bond either through the evaporation of a solvent or through curing via heat, time, or pressure.