Primer 13: Two-Component Epoxy Primer Technical Details

Overview

Primer 13 is a two-component primer supplied in base and hardener packs, designed specifically for concrete surfaces in demanding water-immersion applications. The product is manufactured and supplied by Fosroc and represents a critical substrate preparation step for specialized sealant systems.

Product Composition & Supply

Primer 13 is formulated as a two-component system consisting of separate base and hardener components that must be mixed together before application to ensure correct curing. The product is available in two convenient pack sizes:

• 250ml pack: Base component FC965229-125ML and Hardener component FC965230-125ML
• 1 litre pack (Made to Order): Base component FC965229-500ML and Hardener component FC965230-500ML

Both components are supplied in correct proportions and must be completely mixed to achieve optimal performance.

Primary Applications

Primer 13 is engineered for use in two critical scenarios:

Water Immersion Applications: Primer 13 must be used on concrete in applications subject to semipermanent or long-term water immersion, particularly when used as a preparation for polyurethane sealants like Nitoseal PU250 and Nitoseal PU400.

Porous Surface Preparation: The primer is required for porous surfaces when Nitoseal PU400 is to be used in water immersed applications, ensuring maximum adhesion and durability in these demanding conditions.

Joint Priming: Primer 13 is recommended by Fosroc for priming concrete joints, particularly those with movement, before sealant application to enhance bonding performance.

Key Features & Benefits

• Two-component formulation ensures complete chemical activation
• Specifically formulated for water-immersion compatibility
• Enhances adhesion of polyurethane sealants to concrete substrates
• Suitable for moving joints where flexibility and durability are critical
• Professional-grade preparation for long-term performance

Associated Products

Primer 13 is part of a coordinated system with premium Fosroc sealants:

• Used with Nitoseal PU250: A high-performance polyurethane sealant for vertical interior and exterior applications
• Used with Nitoseal PU400: A low-modulus elastomeric sealant for trafficable and water-immersed applications
• Used with Nitoseal PY350: A polyurea sealant system for specialized joint applications

Application Context

When applying Nitoseal PU250 or Nitoseal PU400 to concrete surfaces that will experience water immersion, proper priming with Primer 13 is essential to achieve optimum adhesion and ensure long-term waterproofing performance. The primer creates a reliable bond line that prevents water penetration and sealant failure in these critical applications.

References

• [1] Fosroc_Nitoseal_PU250_TDS.pdf
• [2] Fosroc_Nitoseal_PU400_TDS.pdf
• [8] Fosroc_Nitoseal_PY350_TDS.pdf