Polyurethane Sealants - 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

Product Information

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.

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.

Technical Information

>80%

Good resistance to water, diluted acids, and diluted alkalines. Not normally for fully immersed conditions. Consult Technical Service for specific data.

−40 °F min. / +170 °F max. (−40 °C to +77 °C)

Application

Application Information

+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.

+40 °C to +100 °F (+4 °C to +38 °C)
Sealants should be installed when substrates are at mid-range of their anticipated movement.

Tack-free time 2 to 6 hours (TT-S-00230C)
Tack-free to touch 3 hours
Final cure 7 to 10 days

Application Steps

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.

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