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Sika Duoflex SL 1.5 Gal
Sika Duoflex SL is a two-component, self-leveling, premium-quality polysulfide sealant ideally suited for quick application to horizontal surfaces. Excellent resistance to water, oils, grease, most solvents, mild acids and alkalis.
- Tough, Elastic, Rubber-Like Seal
- Resilient Within a Wide Temperature Range
- Tenacious Adhestion to Concrete
$368.08
Availability:
In stock
( 6 Available )
SKU
17759
Sika Duoflex SL – 1.5 Gal
Sika Duoflex SL is a two-component, self-leveling, premium polysulfide sealant designed for horizontal joint applications. It provides excellent adhesion to concrete, masonry, stone, and metal surfaces while remaining elastic and durable under expansion and contraction. Resistant to fuels, oils, water, mild acids, and alkalis, Duoflex SL is effective under constant immersion when properly primed. With movement capability of ±25% and strong abrasion resistance, it is ideal for demanding environments such as parking decks, podium slabs, refueling stations, and industrial floors.
For Vertical Applications See NS
Key Features
- Two-component, premium polysulfide formulation.
- Self-leveling sealant for horizontal applications.
- Movement capability of ±25%.
- Excellent resistance to fuels, oils, grease, and mild chemicals.
- Remains flexible across wide temperature ranges.
- Effective in constant immersion when properly primed.
- Durable adhesion to concrete, masonry, stone, metal, and glass.
- Very good UV exposure and color stability.
Applications
- Expansion and control joints in concrete slabs.
- Parking structures and podium decks.
- Tile and brick flooring expansion joints.
- Industrial and commercial floors exposed to chemicals.
- Gas stations and refueling areas.
- Pools and structures exposed to chlorinated water (up to 100 ppm).
Technical Specifications
| Chemistry | Two-component polysulfide sealant |
| Consistency | Self-leveling (Grade SL) |
| Movement Capability (ASTM C920) | ±25% |
| Tensile Strength (ASTM D412) | 150–200 psi |
| Elongation at Break (ASTM D412) | 500–550% |
| Shore A Hardness (ASTM D2240) | 25–30 |
| Abrasion Resistance | Excellent |
| Puncture Resistance | Excellent |
| UV Exposure / Color Stability | Very good |
| Service Temperature Range | -40°F to 170°F (-40°C to 77°C) |
| Pot Life | ~1 hour at 73°F (23°C) |
| Tack-Free Time | ~6 hours at 73°F (23°C) |
| Full Cure | ~7 days at 73°F (23°C) |
| Packaging | 1.5 gal (5.7 L) unit |
| Shelf Life | 1 year in unopened container |
| Compliance | ASTM C920, Type M, Grade SL, Class 25, Use I, NT, M, G, A, O |
Frequently Asked Questions
What surfaces can Duoflex SL adhere to?
It bonds to concrete, masonry, stone, metal, wood, ceramic, and glass surfaces without primer in most conditions.
Is Duoflex SL suitable for submerged conditions?
Yes. With proper priming, it is effective under constant immersion or saturated environments.
What is the recommended movement capability?
Duoflex SL is designed to accommodate ±25% joint movement.
Can it resist fuel and oil exposure?
Yes. It provides excellent resistance to fuels, oils, grease, solvents, and mild acids/alkalis.
How long does it take to cure?
Tack-free in about 6 hours and fully cured in 7 days at 73°F (23°C).
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