Thin foil, well thermoformable, Polyethylene (PE). Does not bond to Erkodent thermoforming materials. Recommendation: Universal UZF is especially suitable for Erkoflex.
To insulate Erkoflex against plaster. To even out small roughnesses on the plaster surface, for a smoother, more transparent and hygienic inner surface. Can be taken off without residues after thermoforming.