Sikaflex®-15 LM 20 oz Sausage – Low Modulus Polyurethane Sealant

Sikaflex-15 LM is a high-performance, low-modulus, 1-component polyurethane sealant designed for demanding construction and facade applications. This non-sag elastomeric sealant offers exceptional movement capability, strong adhesion to a wide range of substrates, and long-term weather resistance for vertical and horizontal joint applications. Ideal for commercial construction, EIFS systems, concrete panels, window and door perimeters, flashing details, and high-movement facade joints, Sikaflex®-15 LM cures to a durable, flexible consistency with outstanding cut and tear resistance. FEATURES Low modulus formulation provides excellent flexibility and stress relaxation High movement capability rated at +100/-50% per ASTM C719 1-component polyurethane sealant ready to use with no mixing required Non-sag consistency ideal for vertical and sloped applications Excellent adhesion to most construction materials without primer Weather resistant performance proven in harsh climates worldwide Paintable surface after cure Jet fuel resistant formulation Non-leaching polyurethane technology EIFS compatible and tested in accordance with ASTM C1382 UL fire-rated joint systems available for select assemblies TYPICAL APPLICATIONS Concrete expansion and control joints Precast concrete panel systems Window and door perimeter sealing Reglets and flashing terminations Roofing detail applications EIFS joints and transitions High-rise facade movement joints Similar and dissimilar material joints SPECIFICATIONS Product type: Polyurethane elastomeric sealant Consistency: Non-sag Modulus: Low modulus Packaging: 20 fl oz sausage Pack quantity: 20 sausages per box Movement capability: +100/-50% Tack-free time: 2–6 hours Final cure: 7–10 days Application temperature: 40°F to 100°F Storage temperature: 40°F to 95°F Shelf life: 18 months unopened STANDARDS & COMPLIANCE ASTM C920, Type S, Grade NS, Class 100/50 Federal Specification TT-S-00230C, Type II, Class A Federal Specification TT-S-001543A, Type Non-Sag ASTM C1382 tested for EIFS applications UL Fire Rated Joint Systems compatible AVAILABLE COLORS White Colonial White Off-White Black Almond Medium Bronze Redwood Tan Stone STORAGE & HANDLING Store unopened material in dry conditions protected from direct sunlight between 40°F and 95°F. Condition material to 65°F–75°F before application for best performance. 20 OZ SAUSAGE – YIELD IN LINEAR FEET Joint Width 1/4" Depth 3/8" Depth 1/2" Depth 1/4" 48.1 ft — — 3/8" 32.1 ft 21.4 ft — 1/2" 24.1 ft 16.0 ft 12.0 ft 3/4" 16.0 ft 10.7 ft 8.0 ft 1" — — 6.0 ft 1-1/4" — — 4.8 ft 1-1/2" — — 4.0 ft RESOURCES Product Data Sheet Safety Data Sheet Safety Data Sheet (Spanish) LEED Sealant VOC Letter VOC Certificate