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All Categories > Construction Sealants & Adhesives > Sika Construction Sealants > Sikaflex 15 LM Low-Modulus Elastomeric Sealant  
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Sikaflex 15 LM Low-Modulus Elastomeric Sealant

Sikaflex-15 LM is a low-modulus, high-performance, 1-component, polyurethane-based, non-sag elastomeric sealant. Meets Federal Specification TT-S-00230C, Type II, Class A; ASTM C-920, Type S, Grade NS, Class 100/50, use T, NT, G, M; Federal Specification for silicones - TT-S-001543 A, Type non-sag. Tested in accordance with ASTM C-1382 for use in EIFS systems.

Where to use
Excellent for moving joints in vertical applications.
Suitable for use between similar as well as dissimilar materials.
Typical applications include joints in concrete panel and wall systems, around window and door frames, reglets, flashing, common roofing detail applications, etc.
Exceptional sealant choice for high-rise and facade applications where high movement capability is required.
An effective sealant for use in Exterior Insulation Finish Systems (EIFS).

Low modulus of elasticity.
Easy and ready to use.
Eliminates time, effort, waste, and equipment clean-up.
Cures to a durable, flexible consistency.
Exceptional cut and tear resistance.
Stress relaxation properties.
Excellent adhesion.
Bonds to most construction materials without a primer.
Paintable with water-, oil- and rubber based paints.
Excellent resistance to aging, weathering.
Jet fuel resistant.
Proven in tough climates around the world.
Capable of +100% / -50% joint movement.
Two-hour UL fire rating when used with Ultra Block®

Item #

Product Name

Unit Quantity


SIK15LM.SC SikaFlex 15 LM Low Modulus Sealant 24 Per Case 1 lb. Per Cartridge
SIK15LM.SS SikaFlex 15 LM Low Modulus Sealant 20 per case 1.5 lbs Per Sausage


Sikaflex 15 LM Data Sheet

Sikaflex 15 LM MSDS