Sikaflex 175 FC PU

15/07/2026

Sikaflex 175 FC PU

Sikaflex 175 FC PU


Fast-Curing Polyurethane-Based Joint Sealant

Sikaflex®-175 FC PU is a one-component, moisture-curing, polyurethane-based high-performance sealant. With its excellent adhesion to a wide range of substrates, permanent elasticity, and 25% movement capability, it is widely used in the automotive, industrial assembly, and construction industries.

Key Advantages

✔ Provides permanent elasticity
✔ Thixotropic formulation prevents sagging on vertical surfaces
✔ Accommodates 25% joint movement for reliable long-term performance
✔ Non-shrinking and highly durable
✔ Easy to apply using a standard caulking gun
✔ Paintable after curing

Applications

Sikaflex®-175 FC PU is suitable for a wide variety of sealing applications across multiple industries.

Main application areas include:

  • Automotive industry: Manufacturing of vehicles, caravans, and similar transport equipment
  • HVAC systems: Sealing air conditioning and ventilation duct installations
  • Roofing applications: Rain gutters and pipe connection joints
  • Metal sheet assemblies: Vibration reduction and sealing applications
  • Construction joints: Sealing joints against water, air, gas, and dust penetration

Technical Specifications

Chemical Base:
One-component polyurethane

Curing Mechanism:
Moisture curing

Skin Formation Time:
Approximately 40 minutes (23°C / 50% RH)

Curing Rate:
Approximately 3 mm per day

Sagging:
0 mm (EN ISO 7390)

Movement Capability:
25%

Application Temperature:
+5°C to +35°C

Standards

  • EN 15651-1 F-EXT-INT
  • EN 15651-4 PW-INT

Packaging Options

  • 330 g cartridge (12 cartridges per box)
  • 700 g foil pack (12 foil packs per box)

Available Colors

  • Black
  • White
  • Grey
  • Red
  • Champagne

Why Choose Sikaflex®-175 FC PU?

Sikaflex®-175 FC PU combines fast curing, strong adhesion, and long-lasting flexibility, making it an ideal sealing solution for applications ranging from automotive manufacturing to roofing systems.

Its thixotropic, non-sag formulation ensures clean and easy application on vertical joints, while its paintable surface provides both technical performance and an attractive finished appearance.