Sikaflex®-1c SL is a high-performance, single-component, self-leveling polyurethane sealant designed for horizontal joint sealing in concrete and cementitious slabs. Its pourable, non-sag formula and accelerated curing properties make it ideal for expansion joints and applications subject to occasional water immersion. With excellent durability, adhesion, and elasticity, this sealant provides a weather-resistant, long-lasting seal for a wide range of interior and exterior projects.
This listing is for a Full Pallet, which is 48 cases totaling 1152 cartridges.
Features & Benefits
- Self-Leveling: Pourable application ideal for flat, horizontal surfaces
- One-Component: No mixing required; ready to use
- Accelerated Curing: Tack-free in 1–2 hours, full cure in 3–5 days
- Excellent Adhesion: Bonds to concrete, aluminum, glass, and more without primer (except immersion use)
- Highly Elastic: 320% elongation at break with >90% recovery
- Weather & Jet Fuel Resistant: Long-term performance in exposed and industrial environments
- Green & Damp Concrete Compatible: Install on green concrete after 24 hrs or damp concrete after 1 hr
- Paintable: Compatible with many coatings (adhesion testing recommended)
- Meets Standards: ASTM C-920 & TT-S-00230C
- Wide Service Range: -40°F to +170°F
Technical Data
| Property | Value |
|---|---|
| Shore A Hardness | 40 ± 5 (ASTM D2240) |
| Tensile Strength | 150 psi (ASTM D412) |
| Elongation at Break | 320% |
| Movement Capability | ±25% (ASTM C719) |
| Adhesion (Peel Strength) | Concrete >28 lbs, Glass >37 lbs, Aluminum >30 lbs (0% loss) |
| Tack-Free Time | 1–2 hours (ASTM C679) |
| Full Cure | 3–5 days |
| Service Temperature Range | -40°F to +170°F |
| Packaging Options | 10.1 oz, 29 oz, 5 gal, 50 gal |
| Shelf Life | 1 year (cartridges), 6 months (pail/drum) |
Recommended Applications
Ideal for use in flat concrete surfaces and horizontal joints in areas where a self-leveling, long-life sealant is needed:
- Sidewalks & walkways
- Balconies & plazas
- Parking structures
- Pavements & driveways
- Warehouses & industrial floors
- Terraces & roof decks
- Civil structures & water treatment facilities
- Pitch pans, canals, and horizontal expansion joints
Common Substrates:
- Concrete (new or green)
- Cementitious slabs
- Aluminum
- Glass
- Stone or tile (with proper prep)
Application Details
Surface Preparation
- Surfaces must be clean, sound, dry or damp (no standing water)
- Remove grease, curing compounds, and other contaminants
- Install backer rod or bond breaker to control depth and prevent 3-point bonding
- For green concrete: Wait 24 hrs after pour, control joints cut at least 8 hrs prior
- For damp concrete: Wait 1 hour after water is removed
- Primer is required for immersion service
Joint Design
- Recommended ratio: 2:1 width to depth
- Depth range: ¼" to ½"
- Min. depth for traffic areas: ½"
- Max. movement: ±25% of joint width
Application Conditions
- Ambient/Substrate Temp: 40°F to 100°F
- Precondition cartridges to ~70°F for best flow
- Pour in one direction, allow sealant to level naturally
- Tooling is minimal but can be used for finishing
Coverage
- 10.1 oz cartridge: ~24.3 ft (¼" x ¼" joint)
- 29 oz cartridge: ~69.8 ft (¼" x ¼" joint)
