Recently Viewed Items

Clear this list

Sikaflex 15 LM Elastomeric Sealant

Sikaflex 15 LM Elastomeric Sealant

Description of Sikaflex 15 LM Elastomeric Sealant

Scroll to Pricing

Formulated to be used with moving joints or where high movement capabilities are needed, the Sikaflex-15 LM is a low-modulus, 1-component, polyurethane-based elastomeric sealant. This sealant has a joint movement of +100% / -50%, making it perfect for wall systems, around windows and door frames, high-rise and facade applications.

Sikaflex 15 LM has great adhesion properties, so bonding to most construction materials without a primer is possible. After curing, the non-sag sealant is paintable using water, oil, and rubber based paints to match surrounding materials.

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 (Exterior Insulation Finish Systems) systems.

Please click the "More Information" tab for additional data.

*Lead time may apply for certain color options.

Colors shown may vary from finished product.

Attention: This product is only shipped UPS Ground, please choose that option when checking out!

Write a Review After receiving your order add a new product review here and receive 10% Off on your next order!!

Features and Benefits

  • [product_feature_name]


Sika 15lm CW 10/2/2013
Reviewed by: Kierstin Martin from Pasadena, MD.
Great order, cheapest find. Did the job!
Senior Engineer 3/12/2012
Reviewed by: Rob Clark from New Orleans.
Used this product for sealing a cut slot in a concrete wall. It worked very well and applied easily.
Project Manager 2/23/2012
Reviewed by: Dwight Devore from Big Pine Key, FL.
Excellent product.

More Info

Typical Data  (Material and curing conditions @ 73F (23C) and 50% R.H.)
Shelf Life 10.3 fl. os. cartridges - 15 Months
Storage Conditions Store at 40-75F. Condition material to 65-75F before using.
Colors White, colonial white, aluminum gray, limestone, black, dark bronze, capitol tan.
Application Temperature 40 to 100F. Sealant should be installed when joint is at mid-range of its anticipated movement.
Service Range -40 to 170F (-40 to 75C)
Curing Rate Tack-free time - 3 to 6 hours (TT-S-00230C)
Tack-free touch - 3 hours
Final cure - 7 to 10 days
Recovery >80%
Shore A Hardness (ASTM D-2240) 21 day 25 5
Tensile Properties (ASTM D-412) 21 Day  Tensile Stress   125 psi (.86 MPa)
  Elongation at Break   700%
  Modulus of Elasticity 25% 20 psi (.13 MPa)
    50% 35 psi (.24 MPa)       
    100% 50 psi (.34 MPa)
Adhesion in Peel (TT-S-00230C) Substrate  Peel Strength Adhesion Loss
25 lb.
25 lb.
30 lb.
Weathering Resistance Excellent
Chemical Resistance Good resistance to water, diluted acids, and diluted alkalines. Not normally for fully immersed conditions.


Payment methods
Secure server