Sika Sikaflex 1C SL Limestone 5 Gallon Pail 106639

Sika Sikaflex 1C SL is a single component, self-leveling, premium-grade polyurethane sealant with an accelerated curing capacity. 1C SL is used to seal horizontal expansion joints in concrete and cementitious slabs.

Can be applied to green concrete 24 hours after pour
Extremely elastic
Durable - resists aging and weathering

$286.95

Typically Ships in 3 Weeks

SKU

18866

Details

Sika Sikaflex-1c SL – Limestone – 5 Gallon Pail

Sikaflex-1c SL is a one-part, self-leveling polyurethane sealant engineered for horizontal expansion joints in concrete and cementitious slabs. With excellent flexibility and accelerated curing, it delivers high-performance joint sealing in sidewalks, parking decks, warehouses, and more. Supplied in a 5-gallon pail, the limestone-colored sealant is jet fuel resistant and suitable for damp or green concrete.

Key Features:

Self-leveling, pourable polyurethane sealant
One-component formula – no mixing required
Accelerated curing with tack-free time of 1–2 hours
Jet fuel resistant; approved for water immersion
Applies to green concrete 24 hours after pour
Excellent adhesion to concrete, mortar, aluminum, and glass
±25% movement capability (ASTM C-719)

Applications:

Horizontal expansion joints
Sidewalks, balconies, plazas, terraces
Parking garages and loading docks
Industrial floors and civil structures
Pitch pans and water treatment basins
Concrete joints exposed to weathering or water

Technical Specifications

Base	1-part polyurethane, self-leveling
Color	Limestone
Movement Capability	±25% (ASTM C-719)
Tensile Strength	150 psi (ASTM D-412)
Elongation at Break	320% (ASTM D-412)
Service Temperature	-40°F to 170°F
Curing Time	Tack-free: 1–2 hrs; Full cure: 3–5 days
VOC Content	40 g/L
Shelf Life	1 year (unopened)

Frequently Asked Questions

Can Sikaflex-1c SL be used on green concrete?
Yes. It can be applied 24 hours after concrete is poured, and control joints must be cut at least 8 hours prior.

Is Sikaflex-1c SL traffic-grade?
Yes, but horizontal joints exposed to traffic should have a sealant depth of at least 1/2 inch.

Is it resistant to jet fuel and chemicals?
Yes. It is jet fuel resistant and suitable for chemical exposure in many industrial and commercial environments.

How should the product be applied?
Pour into horizontal joints using standard tools. Use backer rod or bond breaker tape as needed.

What’s the best temperature range for application?
Apply between 40°F and 100°F. The sealant should be conditioned to 65–75°F prior to use.

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