PU Sealant for Construction
Building joints, including perimeter caulking of doors and windows.
* Expansion joints.
* Joints in pre-cast panel.
* External walling, curtain wall joints.
* skylights, smoke vents.
* other structural sealing for areas with structure movement.
Clean and dry all surfaces by removing foreign matter and contaminants such as oil dust, grease, frost, water, dirt, old sealants and any protective coating. Dust and loose particles should be cleaned.
Pierce the membrane at the top of the cartridge and screw on the nozzle. Cut nozzle to give the required angle and bead size. Place the cartridge in an applicator gun and squeeze the trigger. For sausages, a barrel gun is required, clip the end of the sausage and place in barrel gun. Screw end cap and nozzle on to barrel gun. Using the trigger extrude the sealant, to stop depress using the catch plate. Apply Lejell 210 in a continuous bead using enough pressure to properly fill the gaps.
| Testing Items |
Performance |
| Appearance |
Black/White/Gray homogeneous paste |
| Density ( g/cm3 ) |
1 . 35±0.05 |
| Sagging Properties(mm) |
≤1 |
| Elongation at break(%) |
≥600 |
| Volatile content(%) |
≤4 |
| Stretch modulus (Mpa) |
≤0.4 |
| Touch dry time(min) |
≤180 |
| Elastic recovery(%) |
≥80 |
| Extrudability (ml/min) |
80 |
| Pollution properties |
Non |
| Application temperature() |
+5 ~ +35 |
| Shelf life(month) |
9 |
Audited Supplier 
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