It is made of film base dissolved in a solvent.
It is most important that the emulsion of the film be scraped off prior to applying the cement or the splice will fail.
Film cement also has a workable life span, if the amount of solvent falls below a certain level the splices will fail.
Cement life can be extended by the careful addition of its solvent, usually methyl ethyl ketone (MEK) or acetone.
[6][7] This film technology article is a stub.