Sikaflex-1c SL Limestone is a premium, one-component self-leveling polyurethane sealant designed for sealing horizontal expansion joints in concrete and masonry surfaces. Its pourable consistency allows it to flow easily into joints and cracks, creating a durable and flexible seal that resists weathering, aging, and heavy traffic.

This professional-grade sealant is commonly used in driveways, sidewalks, garages, plazas, industrial floors, and civil construction projects where reliable joint protection is required.

Key Features

• Self-leveling formula flows smoothly into horizontal joints

• Single-component polyurethane – no mixing required

• ±25% movement capability to accommodate joint expansion and contraction

• Excellent adhesion to concrete and masonry surfaces

• Weather- and aging-resistant for long-term durability

• Can be applied to green or damp concrete (with proper preparation)

• Jet fuel and chemical resistant for demanding environments

Typical Applications

Sikaflex-1c SL is designed for horizontal expansion joints in:

• Concrete driveways and garage floors

• Sidewalks and walkways

• Parking structures

• Balconies and terraces

• Industrial floors and warehouses

• Plazas, sidewalks, and civil structures

• Water treatment facilities and canals

Product Specifications

Type: Self-leveling polyurethane sealant
Movement Capability: ±25%
Shore A Hardness: ~40 ±5
Tensile Strength: ~150 psi
Elongation at Break: ~320%
Tack Free Time: 1–2 hours
Full Cure Time: 3–5 days
Service Temperature Range: −40°F to 170°F
Color: Limestone
VOC Content: ~40 g/L

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