Product Overview

Renner M045 is a high-performance polyacrylic isocyanate hardener specifically designed to catalyse Renner YL-M720 2K Solvent-Based Primer. When mixed at the correct ratio, it delivers a strong, chemically crosslinked film with excellent hardness, adhesion, and resistance. The hardener ensures a stable and durable coating system that’s ideal for MDF, solid wood, and veneered surfaces used in furniture, cabinetry, and interior joinery.

It’s part of Renner’s professional 2K wood coating system, providing fast drying, excellent sanding properties, and long-term protection.

Coverage & Application

• Mixing ratio: 2 parts YL-M720 Primer : 1 part M045 Hardener (by weight)
• Pot life: 3–4 hours at 20°C after mixing
• Drying times (at 20°C):
  • Dust dry: 30–40 minutes
  • Sandable: 2–3 hours
  • Recoatable: 3–4 hours
• Application method: Spray application (air mix, airless, or conventional spray gun)
• Thinning: Use Renner Polyurethane Thinner (10–20%) if required
• Cleaning: Clean tools immediately after use with PU thinner

Performance & Classification

• Curing performance: Accelerates chemical crosslinking for maximum film hardness and durability
• Adhesion & resistance: Enhances mechanical and chemical resistance of the primer system
• Finish quality: Ensures uniform film formation and improved sanding smoothness
• Durability: Designed for industrial and professional applications
• Compatibility: For use exclusively with Renner YL-M720 and related 2K PU primers

Recommended Use

• Furniture, cabinetry, and interior joinery
• MDF, solid wood, and veneered wood
• Professional finishing and refinishing systems

Technical Details

• Type: Polyacrylic isocyanate hardener (2K catalyst)
• Base: Solvent-based
• Mixing ratio: 2:1 (Primer : Hardener)
• Pot life: 3–4 hours at 20°C
• VOC content: High – professional/industrial use only
• Available sizes: 1L, 5L, 12.5L
• Brand: Renner Italia

Key Features

• Specifically formulated for Renner YL-M720 Polyurethane Primer
• Provides exceptional hardness and adhesion through chemical crosslinking
• Fast-curing with excellent sanding and recoat properties
• Improves chemical and mechanical resistance of the coating system
• Designed for professional spray application
• Ensures consistent performance in industrial finishing environments

FAQ

Q: What is the correct mixing ratio with the primer?
Mix 2 parts Renner YL-M720 Primer with 1 part Renner M045 Hardener by weight.

Q: Can I use this hardener with other primers?
It’s specifically designed for Renner YL-M720 and other compatible Renner 2K PU systems.

Q: What is the pot life after mixing?
Approximately 3–4 hours at 20°C.

Q: How should I clean my tools after use?
Clean immediately with Renner polyurethane thinner or similar solvent-based cleaner.

Q: Is it suitable for professional use only?
Yes, this product is intended for professional and industrial spray applications.