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Sika Sikaflex 15LM 20oz White 442129
Sikaflex-15 LM is a low-modulus non-sag polyurethane sealant in a white 20 oz sausage for high-movement vertical joints. It bonds common substrates and holds +100/-50% movement on facades and panel systems.
- Low-modulus non-sag sealant for vertical moving joints
- +100/-50% movement capability for high-rise work
- Bonds most construction materials without a primer
$340.20
Availability:
Out of stock
Sikaflex-15 LM
Sikaflex-15 LM is a low-modulus one-component polyurethane non-sag elastomeric sealant for moving joints in vertical applications and facades. This white 20 fl oz sausage (part 442129) holds +100/-50% joint movement on high-rise panels, window frames, and EIFS details. It stays flexible through wide temperature swings and bonds most construction materials without a primer.
Key Features
- One-component polyurethane non-sag elastomeric sealant
- ASTM C-920 Type S, Grade NS, Class 100/50; TT-S-00230C Type II Class A
- Movement capability +100/-50%; elongation approximately 700%
- Shore hardness approximately 25 after 21 days
- Tack-free approximately 2 to 6 hours; final cure 7 to 10 days
- Tested for EIFS use under ASTM C-1382
Applications
- Moving joints in concrete panel and wall systems
- Window and door frames, reglets, and flashing details
- High-rise and facade joints needing high movement
- EIFS systems and common roofing detail applications
Technical Specifications
| Property | Value |
|---|---|
| Manufacturer | Sika |
| Product | Sikaflex-15 LM |
| Part no. | 442129 |
| Unit | 20 fl oz sausage |
| Color | White |
| Chemistry | One-component low-modulus polyurethane sealant |
| Movement capability | +100/-50% |
| Elongation | Approximately 700% |
| Shore hardness | Approximately 25 |
| Tack-free | Approximately 2 to 6 hours |
| Service temperature | -40 F to 170 F |
Product documents: Sikaflex-15 LM Product Data Sheet (PDF)
Frequently Asked Questions
What joints suit Sikaflex-15 LM?
Moving vertical joints in concrete panels, facades, window and door frames, reglets, flashing, EIFS, and high-rise work needing high movement capability.
What movement capability does Sikaflex-15 LM hold?
+100/-50% under ASTM C-719, with approximately 700% elongation at break.
What cure time should crews plan for Sikaflex-15 LM?
Tack-free in approximately 2 to 6 hours and final cure in approximately 7 to 10 days.
What ASTM class does Sikaflex-15 LM meet?
ASTM C-920 Type S, Grade NS, Class 100/50, use T, NT, G, A, O, M, and Federal Specification TT-S-00230C Type II Class A.
What primer needs apply for Sikaflex-15 LM?
Most substrates bond without a primer; some EIFS systems require Sikaflex Primer-429 per the system sheet.
What size is Sikaflex-15 LM?
The sausage is 20 fl oz sausage, white, part 442129.
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