... elasticity and adhesion strength; PU sealant Lejell 220 for construction 1.TECHNICAL DATA SHEET(1): Testing Items(2) PerformanceAppearanceBlack ... as oil dust, grease, frost, water, dirt, old sealants and any protective coating. Dust and loose particles should be ... of stickiness may be caused by any operation disobeying construction techniques.* This product is innocuous after curing completely, but ...