Sikaflex®-15 LM
High Performance, 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, A, O, M; Federal Specification for silicones - TT-S-001543 A, Type non-sag.
Tested in accordance with ASTM C-1382 for use in EIFS systems.
- Low modulus of elasticity
- Easy and ready to use
- Eliminates time, effort, waste, and equipment clean-up
- High elasticity – cures to a tough, durable, flexible consistency with exceptional cut and tear resistance
- Stress relaxation
- Very good adhesion – bonds to most construction materials without a primer
- Very good resistance to weathering
- Proven in tough climates around the world
- Urethane-based, suggested by EPA for radon reduction
- Can be painted
- Jet fuel resistant
- Proven in tough climates around the world
- Non-leaching
- Movement capability of +100/-50% (ASTM C 719)
Usage
- 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.
- 2- and 3-hour UL Fire Rated Joint System Nos. FF-S-0007, FF-S-0037, FW-S-0015, FW-S-0018, HW-S-0076, HW-S-0095, WW-S-0011 and WW-S-0060.
- An effective sealant for use in Exterior Insulation Finish Systems (EIFS).
Advantages
- Low modulus of elasticity
- Easy and ready to use
- Eliminates time, effort, waste, and equipment clean-up
- High elasticity – cures to a tough, durable, flexible consistency with exceptional cut and tear resistance
- Stress relaxation
- Very good adhesion – bonds to most construction materials without a primer
- Very good resistance to weathering
- Proven in tough climates around the world
- Urethane-based, suggested by EPA for radon reduction
- Can be painted
- Jet fuel resistant
- Proven in tough climates around the world
- Non-leaching
- Movement capability of +100/-50% (ASTM C 719)
Packaging
10 fl. oz. cartridge, 12 cartridges per box
20 fl oz. foil pack, 20 foil packs per box
5 gallon pail
55 gallon drum
Color
White, Colonial White, Aluminum Gray, Limestone, Black, Dark Bronze, Capitol Tan, Off-White, Beige, Almond, Coping Stone, Aluminum Stone, Medium Bronze, Redwood Tan, Hartford Green and Stone. Special colors on request (min. volume).
Product Details
APPROVALS / STANDARDS
Shelf Life
Sikaflex®-15 LM has a shelf life of 12 months for cartridges and foil packs and 6 months for pails and drums from the date of production, if it is stored in undamaged, original, sealed packaging, and if the storage conditions are met.
Storage Conditions
Sikaflex®-15 LM shall be stored in dry conditions, where it is protected from direct sunlight and at temperatures between +40 °F and +95 °F (+4 °C and +35 °C). Condition material to 65°-75°F before using.
Shore A Hardness
| ~25 (after 21 days) | (ASTM C 661) |
| ~25(after 28 days) | (ISO 868) |
Tensile Stress at Specified Elongation
| ~50psi at 100% elongation | (ASTM D 412) |
Elastic Recovery
>80%
Adhesion in Peel
| Substrate | Peel Strength | Adhesion loss |
| Aluminium | 25 lbs. | 0% |
| Concrete | 30 lbs. | 0% |
| Glass | 25 lbs. | 0% |
Movement Capability
| +100/-50% | (ASTM C 719) |
Chemical Resistance
Good resistance to water, diluted acids, and diluted alkalines. Not normally for fully immersed conditions. Consult Technical Service for specific data.
Resistance to Weathering
| 0 (no cracks) | (ASTM C 793) |
Service Temperature
−40 °F min. / +170 °F max. (−40 °C to +77 °C)
Application
Ambient Air Temperature
+40 °C min. / +100 °F max. (+4 °C to +38 °C), min. 5 °F (3 °C) above dew point temperature
Sealants should be installed when substrates are at mid-range of their anticipated movement.
Substrate Temperature
+40 °C to +100 °F (+4 °C to +38 °C)
Sealants should be installed when substrates are at mid-range of their anticipated movement.
Cure Time
Tack-free time 2 to 6 hours (TT-S-00230C)
Tack-free to touch 3 hours
Final cure 7 to 10 days
Coverage
10.1 oz Cartridge: Yield in Linear Feet
| Width | Depth | Depth | Depth |
| ¼" | 3/8" | ½" | |
| ¼" | 24.3 | ||
| 3/8" | 16.2 | 10.8 | |
| ½" | 12.1 | 8.1 | 6.1 |
| ¾" | 8.1 | 5.4 | 4.0 |
| 1" | 3.0 | ||
| 1¼" | 2.4 | ||
| 1½" | 2.0 |
20 oz Cartridge: Yield in Linear Feet
| Width | Depth | Depth | Depth |
| ¼" | 3/8" | ½" | |
| ¼" | 48.1 | ||
| 3/8" | 32.1 | 21.4 | |
| ½" | 24.1 | 16.0 | 12.0 |
| ¾" | 16.0 | 10.7 | 8.0 |
| 1" | 6.0 | ||
| 1¼" | 4.8 | ||
| 1½" | 4.0 |
1 Gallon: Yield in Linear Feet
| Width | Depth | Depth | Depth |
| ¼" | 3/8" | ½" | |
| ¼" | 307.9 | ||
| 3/8" | 205.3 | 136.8 | |
| ½" | 153.9 | 102.6 | 77.0 |
| ¾" | 102.6 | 68.4 | 51.3 |
| 1" | 38.5 | ||
| 1¼" | 30.8 | ||
| 1½" | 25.7 |
SUBSTRATE PREPARATION
Clean all surfaces. Joint walls must be sound, clean, dry, frost-free, and free of oil and grease. Curing compound residues and any other foreign matters must be thoroughly removed. A roughened surface will also enhance bond. Install bond breaker tape or backer rod to prevent bond at base of joint.