SikaHyflex®-250 Facade

Backing material

:

Use closed cell, polyethylene foam backing rods.

Colour

:

White | Grey | Black

Composition

:

i-Cure® Technology polyurethane

Joint distance [m]

:

2 | 4 | 6 | 8 | 10

Min. joint depth [mm]

:

10 | 15 | 17

Min. joint width [mm]

:

10 | 15 | 20 | 30 | 35

Packaging

:

600 ml foil pack | 20 foil packs per box

Ambient air temperature

:

+5 °C to +40 °C

Bubble-free curing

:

Yes

Curing rate

:

~3 mm/24 hours (23 °C / 50% r.h.)

Density

:

~1.35 kg/l

Elastic recovery

:

~80%

Emissions

:

Very low emissions

Movement capability

:

+100 / −50% (ASTM C 719), ± 25% | +100 / −50%

Resistance to weathering

:

10

Sag flow

:

0 mm (20 mm profile, 50 °C)

Secant tensile modulus

:

~0.30 N/mm2 at 100% elongation (23 °C) | ~0.60 N/mm2 at 100% elongation (−20 °C)

Service temperature

:

−40 °C to +70 °C

Shelf life

:

15 months

Shore A hardness

:

~20 (after 28 days)

Skinning time

:

~70 minutes (23 °C / 50% r.h.)

Solvent-free

:

Yes

Storage conditions

:

dry conditions, where it is protected from direct sunlight and at temperatures between +5 °C and +25 °C.

Substrate temperature

:

+5 °C to +40 °C, min. 3 °C above dew point temperature

Tear propagation resistance

:

~5.0 N/mm

Tooling time

:

~65 minutes (23 °C / 50% r.h.)

Weathering resistance

:

Very good

Certification

:

EN 15651-1 F EXT-INT CC 25 LM | ISO 11600 F 25 LM | DIN 18540 F | ASTM C 920, class 100/50