Sikaflex®-15 LM Low Modulus Elastomeric Sealant is a premium, moisture-curing polyurethane sealant designed for sealing expansion joints and construction joints in concrete and masonry structures. Its low modulus formulation allows for exceptional flexibility, accommodating movement while maintaining a strong and durable seal.

This versatile sealant bonds well to many common construction materials including concrete, brick, masonry, stucco, and metal, making it ideal for both interior and exterior applications.

Key Features

• Low modulus polyurethane sealant for flexible joint movement

• Excellent adhesion to concrete, masonry, brick, and metal

• Durable and weather-resistant for exterior applications

• Moisture-curing formula for long-lasting performance

• Paintable once cured

• Smooth, easy-to-apply consistency

Common Applications

Sikaflex-15 LM is commonly used for:

• Expansion and control joints

• Concrete and masonry joints

• Precast concrete panel joints

• Window and door perimeter sealing

• Vertical and horizontal construction joints

• General building envelope sealing

Specifications

• Brand: Sika

• Product Name: Sikaflex®-15 LM

• Type: Low Modulus Elastomeric Polyurethane Sealant

• Color: Off White

• Cartridge Size: 10.1 oz

• Application: Concrete, masonry, metal, and construction joints

• Cure Type: Moisture curing

• Movement Capability: ±25% joint movement

• Standards: Meets ASTM C920 specifications

Why Contractors Choose Sikaflex-15 LM

Sikaflex-15 LM is trusted by contractors for its flexibility, durability, and strong adhesion across many building materials. Its low modulus design allows it to accommodate structural movement without cracking, making it ideal for long-term sealing in demanding construction environments.

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