Sika Sikasil 728 SL Limestone 29oz

Sikasil 728 SL is a self-leveling, one-component, ultra low modulus, elastomeric, neutral cure silicone sealant. Excellent flexibility for dynamic joint movement and extreme temperature conditions.

Ideal for highway and bridge applications
Excellent flexibility
Resistant to road salt and jet fuel

$50.09

Availability: In stock ( 151 Available )

SKU

17875

Sika Sikasil-728 SL – Self-Leveling Silicone Joint Sealant

Sika Sikasil-728 SL is a one-component, self-leveling, neutral-cure silicone sealant designed for high-movement joints in parking garages, highways, bridges, and other exposed horizontal surfaces. It cures to form a durable, low-modulus, elastomeric material with excellent flexibility and adhesion. This highway-grade sealant meets ASTM and TT-S standards and bonds well to concrete, asphalt, metal, and other substrates. It is jet fuel resistant, road salt resistant, and performs reliably in extreme temperatures, making it an excellent choice for high-traffic and exterior expansion joints.

Key Features:

Self-leveling, no tooling required
Ultra low modulus for dynamic joint movement
Excellent weathering and UV resistance
Adheres to concrete, steel, aged asphalt, and more
Jet fuel and road salt resistant
Performs in hot and cold climates
Meets ASTM C-920, TT-S-00230C, TT-S-001543A
Available in 29 oz cartridges, 5-gallon pails, and drums

Technical Specifications:

Property	Value
Movement Capability	+100% / –50% (ASTM C-719)
Shore A Hardness	3–5 (ASTM C-661)
Elongation at Break	1100% (ASTM D-412)
Tensile Strength	100 psi (ASTM D-412)
Peel Adhesion	25 pli (ASTM C-794)
Tack Free Time	115 minutes (ASTM C-679)
Service Temperature Range	-80°F to +350°F
VOC Content	29 g/L (0.24 lb/gal)

Frequently Asked Questions:

Is Sikasil-728 SL safe for airport or runway use?
Yes. It's jet fuel resistant and designed to perform under heavy traffic, including on tarmacs and runways.

Can Sikasil-728 SL be used with asphalt?
Yes, it adheres to aged, cured asphalt. However, do not use it on new asphalt or asphalt-to-asphalt joints.

Does this sealant require priming?
No, it generally bonds without a primer. But for best results in horizontal joints, priming is recommended.

What tools are needed for application?
None. This is a self-leveling sealant, so no tooling is required after application.

More Information