Vulkem 171 Primer – The Essential Bond for Superior Polyurethane Adhesion

Ensure your polyurethane sealants and membranes perform to their maximum potential with Vulkem 171 Primer. This fast-drying, one-part, moisture-curing primer is specially formulated to penetrate and prepare porous substrates, creating an unbeatable bond for Vulkem and other polyurethane systems. Its rapid cure time means you can apply membranes in as little as 60 minutes after application, keeping your projects on schedule without compromising on performance.

As the standard primer for Tremco's polyurethane membrane range, Vulkem 171 is the trusted choice of professionals for both interior and exterior applications where a strong, durable seal is critical.

Key Features & Benefits:

• Rapid Drying Formula: Allows for overcoating with polyurethane membranes within 60 minutes of application, significantly reducing project wait times.
• Superior Adhesion Promotion: Enhances bond strength on porous substrates including concrete, plywood, and other masonry surfaces.
• Single-Component Convenience: Ready-to-use straight from the container, ensuring efficient material use and easy application for projects of any size.
• Versatile Application: Suitable for both internal and external use under all Tremco polyurethane membranes and sealants.
• Moisture-Curing Technology: Reacts with ambient moisture in the air to form a strong, durable primer layer.
• Professional Reliability: The specified primer for ensuring waterproofing systems meet their designed performance and warranty requirements.

Primary Applications:

• Pre-Treatment for Membranes: Essential primer for Vulkem T, Vulkem 116, and other Tremco polyurethane waterproofing membranes.
• Porous Surface Preparation: Ideal for concrete slabs, precast panels, masonry, and plywood substrates.
• Joint Sealant Preparation: Prepares concrete joints and interfaces before the application of polyurethane sealants.
• Commercial & Civil Projects: Used in plaza decks, parking structures, balconies, and industrial flooring systems.

Technical Specifications:

• Type: One-part, solvent-based, moisture-curing primer
• Color: Amber
• VOC Content: Maximum 580 g/L
• Solids by Volume: 60%
• Overcoating Time: Minimum 60 minutes, Maximum 4 hours
• Packaging: 15L container
• Shelf Life: 12 months in original, unopened packaging

Surface Preparation Requirements:

• Concrete: Must be cured (min. 20 MPa strength), dry (<4.5% moisture), and free of laitance, dust, contaminants, and curing agents.
• Surface Finish: Must be sound and smooth; rough surfaces may require levelling with a product like TREMprime EP.
• Cracks & Spalls: All cracks >1.6mm and spalled areas must be properly repaired prior to primer application.

High moisture substrates (>4.5% moisture or above, as per a Tramex CME Moisture Meter)
Substrates with a poor finish or numerous surface imperfections.
Overcoating with a water based membrane.