TREMproof WB Primer – Advanced Water-Based Primer for Superior Membrane Performance

Achieve a flawless, long-lasting waterproofing membrane with TREMproof WB Primer, the essential water-based primer for Tremco's waterborne membrane systems. This single-component, low-VOC primer is engineered to deeply penetrate porous substrates, creating a superior bond while preventing "green cracking" and inconsistencies in the final membrane. Its ultra-low viscosity formula migrates deep into the capillary tracks of concrete, ensuring maximum surface preparation and optimal performance of the overlying waterproofing system.

Designed with the contractor in mind, TREMproof WB Primer offers easy water clean-up and minimizes solvent exposure on the job site, making it a safer, more efficient choice for both enclosed interior spaces and exterior applications.

Key Features & Benefits:

• Superior Adhesion & Membrane Integrity: Promotes a strong bond and prevents "green cracking" by minimizing excessive absorption of water-based membranes into the substrate.
• Deep Penetrating Formula: Ultra-low viscosity ensures the primer migrates deep into concrete capillaries and porous surfaces for maximum preparation.
• Low VOC & Contractor Friendly: Significantly reduces solvent fumes, making it ideal for use in confined or occupied spaces where air quality is a concern.
• Easy Water Clean-Up: Simplifies post-application cleanup with just water, reducing the presence of harsh chemicals on site.
• Fast Curing: Typically cures within 30 minutes to 1 hour under ideal conditions, helping to keep projects on schedule.
• Versatile Substrate Compatibility: For use on concrete, masonry, fibre cement board, and other porous surfaces prior to water-based membrane application.

Primary Applications:

• Pre-Membrane Priming: Essential primer for TREMproof WB and other Tremco water-based waterproofing membranes.
• Porous Surface Preparation: Ideal for concrete slabs, masonry walls, precast panels, and fibre cement boards.
• Interior & Exterior Use: Safe for enclosed areas like basements and parkades, as well as external balconies and podiums.
• Commercial & Residential Projects: Suitable for a wide range of applications from high-rise constructions to residential renovations.

Technical Specifications:

• Type: Single-component, water-based primer
• Color: White
• Coverage Rate: Approximately 4.0 m²/L (0.25mm WFT)
• Packaging: 15L container
• Curing Time: 30 minutes - 1 hour (guide only, dependent on conditions)
• Shelf Life: 12 months in original, unopened packaging

Surface Preparation & Usage:

• Concrete: Must be cured (min. 20 MPa strength), dry (no ponding water), and free of laitance, dust, and contaminants.
• Application: Apply at a rate of 4m²/L, working the material into the substrate to fill voids.
• Important Note: Not for use on non-porous surfaces like steel or as a standalone coating/vapour barrier.

Not to be used as a coating/vapour barrier.
Not to be used on non-porous surfaces, especially steel, metal or
smooth concrete.
When applied in enclosed areas, the cure rate of TREMproof WB primer will be dramatically decrease. As such, Tremco recommends adequate ventilation and air flow to promote sufficient drying times.
Storing or installing TREMproof WB in cool or high relative humidity environments will dramatically increase the time needed for the TREMproof WB to cure.