Sikaflex Construction+ Polyurethane Sealant

High-Performance Polyurethane Sealant

Product Description:

Sikaflex Construction+ Polyurethane Sealant is a premium-grade, one-part polyurethane sealant designed for a wide range of construction joint sealing applications. Engineered by Sika, a global leader in construction chemicals, Sikaflex Construction+ Polyurethane Sealant delivers exceptional durability, weather resistance, and long-lasting flexibility. It is ideal for both interior and exterior use, ensuring superior performance even in harsh environmental conditions.

Key Features & Benefits:

• Excellent Elasticity: Maintains elasticity under a wide range of temperatures and joint movements.
• Weather-Resistant: UV and weathering resistance make it ideal for outdoor applications.
• High Adhesion: Bonds well without the need for primer to most construction materials including concrete, masonry, brick, and metal.
• Non-Sag Formula: Ideal for vertical and horizontal joints.
• Low VOC Emissions: Meets LEED® and green building standards.
• Paintable: Compatible with most water-based paints after curing.
• Bubble-Free Curing: Ensures a professional finish without internal defects.

Typical Applications:

• Expansion and connection joints in concrete structures
• Perimeter joints around doors and windows
• Facade elements, precast concrete, and cladding panels
• Vertical and horizontal control joints
• Joints subject to moderate movement in building facades

Technical Data:

• Base: Polyurethane
• Curing Mechanism: Moisture-cure
• Skin Time: Approx. 60 minutes (23°C / 50% RH)
• Curing Rate: ~3 mm/24 hr
• Shore A Hardness: ~40 (after 28 days)
• Movement Capability: ±25%
• Service Temperature: -40°C to +70°C
• Application Temperature: +5°C to +40°C
• Colors Available: Grey, White, Black, Beige
• Packaging: 600 ml sausages, 300 ml cartridges

Substrate Preparation:

Ensure all surfaces are clean, dry, and free from grease, oil, or dust. Use Sika® Primer when necessary to enhance adhesion, especially on porous or sensitive substrates. Conduct preliminary adhesion tests when unsure about compatibility.

Application Guidelines:

Apply Sikaflex Construction+ Polyurethane Sealant using a standard caulking gun. Fill joints completely and tool within the skin time to ensure a smooth, consistent finish. Protect from water and contaminants during the curing process.

Storage & Shelf Life:

Store in original, unopened packaging in a cool, dry area between +5°C and +25°C. Protect from direct sunlight and frost. Shelf life: 12 months from date of manufacture.

Health & Safety:

Refer to the Safety Data Sheet (SDS) for detailed information on handling, storage, and personal protective equipment.

Why Choose Sikaflex Construction+ Polyurethane Sealant?

Sikaflex Construction+ Polyurethane Sealant offers superior joint sealing performance, trusted by professionals worldwide. Its proven durability, combined with easy application and environmental compliance, makes it the go-to solution for commercial and residential construction projects alike.

Non-porous substrates

Aluminium, anodised aluminium, stainless steel, galvanised steel, powder coated metals or glazed tiles have to be cleaned and pre-treated using Sika® Aktivator-205, wiped on with a clean towel. Before sealing, allow a flash-off time of > 15 minutes (< 6 hours). Other metals, such as copper, brass and titanium-zinc, also have to be cleaned and pre-treated using Sika® Aktivator-205, wiped on with a clean towel.

After the necessary flash-off time, use a brush to apply Sika® Primer-3 N and allow a further flash-off time of > 30 minutes (< 8 hours) before sealing the joints. PVC has to be cleaned and pre-treated using Sika® Primer-215 applied with a brush. Before sealing, allow a flash-off time of > 30 minutes (< 8 hours)

Porous substrates

Concrete, aerated concrete and cement based renders, mortars and bricks shall be primed using Sika® Primer-3 N applied with a brush. Before sealing, allow a flash-off time of > 30 minutes (< 8 hours). For more detailed advice and instructions please contact the local Dusk Technology Technical Services Department.

CLEANING OF TOOLS

Clean all tools and application equipment immediately after use with Sika® Remover-208 and/or Sika® TopClean T. Once cured, residual material can only be removed mechanically.

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