Sika - SikaHyflex-250 Facade sealing material

High-quality sealing material intended for concrete, brick facades and external insulation systems (EIFS).

Features

• one-component
• very good resistance to weather conditions
• deformability + 100 / -50% (according to ASTM C 719)
• cures without gas bubble formation
• flexible
• bonding under the influence of moisture
• low ground pressure
• easy application and removal
• low module
• good adhesion to many different substrates
• solvent-free
• very low emissions

Application

The product is intended for flexible and watertight sealing of expansion joints and adjacent gaps in facades. Due to its very low modulus, SikaHyflex-250 Facade can also be used for sealing in external thermal insulation systems (EIFS).

Technical data

• chemical base moisture-binding polyurethane with i-Cure technology
• light gray color
• density about 1.35 kg / dm ³ (according to PN-EN ISO 1183-1)
• Shore A hardness (after 28 days) about 20 (according to PN-EN ISO 868)
• secant tensile modulus: about 0.30 MPa (23 ° C) at 100% elongation; about 0.60 MPa (−20 C) at 100% elongation (according to PN-EN ISO 8339)
• elongation at break approx. 800% (according to PN-ISO 37)
• elastic recovery approx. 80% (according to PN-ISO 7389)
• tear propagation resistance approx. 5.0 N / mm (according to PN-ISO 34)
• displacement transfer capacity 25% (according to PN-EN ISO 9047) + 100 / −50% (according to ASTM C 719)
• resistance to weather conditions 10 (according to ISO / DIS 19862)
• operating temperature from -40 C to +70 C
• packaging capacity of 600 ml from 1.3 to 6 m; depending on the width and depth of the joint
• drainage (profile 20 mm, 50 C) 0 mm (according to PN-EN ISO 7390)
• substrate and ambient temperature from +5 C to +40 C
• curing speed (23 C / 50% relative humidity) approx. 3 mm / 24 h (according to CQP 049-2)
• skinning time (23 C / 50% relative humidity) approx. 70 min (according to CQP 019-1)
• smoothing time (23 C / 50% relative humidity) approx. 65 min (according to CQP 019-2)
• foil packaging 600 ml, 20 pieces in a carton