SikaHyflex-305 EU white C295 | MCT CHEMICALS | SIKA PAKISTAN

SikaHyflex®-305 EU

Weather Sealant for Curtain Walls and Metal Cladding Facades

DESCRIPTION
SikaHyflex®-305 EU is a one-component, moisture-curing, low-modulus elastic weather sealant. It is specifically designed for use in hot and tropical climates.

USES
SikaHyflex®-305 EU is intended for weatherproofing and sealing applications where long-lasting performance in harsh conditions is necessary. It is especially suitable as a weather sealant for curtain walls and metal cladding facades.

CHARACTERISTICS / ADVANTAGES

• Exceptional resistance to weathering
• Movement capability of ±50% (ASTM C 719)
• Excellent workability
• Strong adhesion to a wide range of substrates
• Solvent-free formula
• Neutral curing process

SUSTAINABILITY

• Certified as “Low Emitting Materials” according to the Al Sa’fat – Dubai Green Building Evaluation System by Dubai Central Laboratory (DCL), certificate No. CL18020589
• EMICODE EC1 PLUS R
• LEED v4 EQc 2: Low-Emitting Materials

APPROVALS / CERTIFICATES

• EN 15651-1 F EXT-INT CC 25 LM
• EN 15651-2 G CC 25 LM
• ASTM C 920, Class 50
• ISO 11600 F 25 LM & G 25 LM
• DIN 18540 F

PRODUCT INFORMATION

• Composition: Neutral-cure silicone
• Packaging: 300 ml cartridge (25 cartridges per box), 600 ml foil pack (20 foil packs per box)
• Color Options: Black, white, grey S1, grey S3, grey S4, grey S6, RAL 7024, ivory, beige, champagne, brown, bronze
• Shelf Life: 12 months for cartridges, 15 months for foil packs (when stored in original, sealed packaging under proper conditions)
• Storage Conditions: Store in a dry area, protected from direct sunlight, and at temperatures between +5°C and +25°C.
• Density: ~1.50 kg/l (ISO 1183-1)

TECHNICAL INFORMATION

• Shore A Hardness (after 28 days): ~25 (ISO 868)
• Secant Tensile Modulus at 100% Elongation (23°C): ~0.35 N/mm² (ISO 8339)
• Tensile Strain at Break: ~900% (ISO 37)
• Elastic Recovery: ~80% (ISO 7389)
• Tear Propagation Resistance: ~4.0 N/mm (ISO 34)
• Movement Capability: ±25% (ISO 9047), ±50% (ASTM C 719)
• Weathering Resistance: 10 (ISO / DIS 19862)
• Service Temperature: −40°C to +150°C

JOINT DESIGN

• Joint width: ≥ 6 mm and ≤ 45 mm
• Joint depth: ≥ 6 mm and ≤ 15 mm
• Maintain a width-to-depth ratio of 2:1
  Example Joint Dimensions:
  • Joint Width 10 mm, Joint Depth 6 mm
  • Joint Width 15 mm, Joint Depth 8 mm
  • Joint Width 20 mm, Joint Depth 10 mm
  • Joint Width 30 mm, Joint Depth 15 mm
  • Joint Width 45 mm, Joint Depth 15 mm

COMPATIBILITY
SikaHyflex®-305 EU is compatible with most SikaHyflex® and Sikasil® silicone weather sealants, Sikasil® SG adhesives, and Sikasil® IG sealants. Contact Sika technical service for approval before using other sealants and adhesives in direct contact with SikaHyflex®-305 EU.

APPLICATION INFORMATION

• Consumption:
  • 10 mm joint width, 10 mm depth: 6 m per 600 ml foil pack
  • 15 mm joint width, 8 mm depth: 5 m per 600 ml foil pack
  • 20 mm joint width, 10 mm depth: 3 m per 600 ml foil pack
  • 25 mm joint width, 12 mm depth: 2 m per 600 ml foil pack
  • 30 mm joint width, 15 mm depth: 1.3 m per 600 ml foil pack
• Backing Material: Use closed-cell polyethylene foam backing rods.
• Sag Flow: ~0 mm (20 mm profile, 50°C) (ISO 7390)
• Ambient Temperature: +5°C to +40°C, minimum 3°C above dew point
• Substrate Temperature: +5°C to +40°C