I agree with gijane. Many, many years ago when I became a tech we used collodion. When they started using Elefix I was very sceptical. I finally tried it and never looked back. No more fumes, storage problems, using an air compresser to dry the glue, patients complaining etc. Holds just as well all night (and the next day for MSLTs) and is easier to remove in the morning. I know everybody has their preferences but I’ll take Elefix any day over collodion.