Sikaflex 140 Construction | Joint sealant for building joints
Product Category: Construction Sealant Brand: Sika Model Code: Sikaflex®-140 Construction
Description
Sikaflex®-140 Construction is a 1-component polyurethane elastic joint sealant designed for durable sealing of connection and movement joints in concrete and masonry facades. Suitable for both interior and exterior applications and general construction sealing.
Applications
Interior & exterior joint sealing
Around window and door frames
Precast and prefabricated elements
Floor and wall construction joints
Building envelope weatherproofing
Key Features
Easy extrusion and tooling
Movement capability: ±25% (ASTM C719)
Strong adhesion to common construction materials
Bubble-free curing
Suitable for durable long-term sealing
Standards & Certifications
ASTM C920, Class 25
ASTM C920-18 Type S, Grade NS
Use classification: T1, NT, M
Supports LEED v4 Low-Emitting Materials
Product Information
Composition: Sika i-Cure® polyurethane
Packaging: 600 ml foil pack (20 per box)
Colour: Multiple colours available
Shelf Life: 12 months
Storage: +5°C to +30°C, dry, unopened packaging
Density: 1.25 ± 0.1 kg/L
Technical Data
Mechanical Properties
Shore A Hardness: ~35
Tensile Modulus: ~0.30 N/mm²
Elastic Recovery: ~70%
Tear Resistance: ~6.0 N/mm
Elongation at Break: ~650%
Movement & Temperature
Movement Capability: ±25%
Service Temperature: -40°C to +70°C
Joint Design
Minimum width: 8 mm
Maximum width: 40 mm
Depth: ≥ 8 mm
Width/Depth ratio:
Facade: 1 : 0.5
Floor: 1 : 0.8
Application Conditions
Application Temperature: +5°C to +40°C
Substrate Temperature: +5°C to +40°C
Must be ≥ 3°C above dew point
Performance
Curing Rate: ~2 mm / 24 hrs
Skin Time: ~120 minutes
Tooling Time: ~100 minutes
Sag Flow: ~2 mm
Substrate Preparation
Surface must be:
Clean, dry, sound
Free from oil, grease, dust, laitance
Strong enough for joint movement
Preparation methods:
Grinding, wire brushing, blasting
Repair damaged edges before application
