Mergal® 165

Bactericide. Used as an in-can preservative in paints, stucco/masonry coatings, EIFS coatings and other coating products where water is a component.

Overview

Mergal® 165 is a high-performance, formaldehyde-free in-can preservative formulated to protect aqueous-based industrial products from microbial degradation. Developed by Arxada (formerly Troy Corporation), it incorporates a synergistic blend of isothiazolinone-based actives, delivering effective and long-lasting protection against bacteria, yeast, and mold. Mergal® 165 is widely appreciated for its excellent compatibility with formulation components, low odor, and strong efficacy across a broad pH and temperature range, making it a reliable choice for sensitive and high-value water-based applications.

Benefits

  • Formaldehyde-Free Preservation – Meets regulatory and eco-label standards

  • Broad-Spectrum Microbial Protection – Active against bacteria, fungi, and yeast

  • Long-Term Shelf Life Stability – Protects formulations during storage and handling

  • Mild Odor – Suitable for odor-sensitive end-use applications

  • Excellent pH and Temperature Stability – Works reliably in diverse industrial systems

  • High Compatibility – Blends easily with emulsifiers, surfactants, and thickeners

Applications

  • Water-Based Paints & Coatings – Prevents spoilage and degradation in interior/exterior paints

  • Adhesives & Binders – Maintains shelf-life and performance in PVAc and acrylic systems

  • Printing Inks – Protects aqueous ink systems from microbial attack during storage

  • Polymer Dispersions – Preserves styrene-acrylic, pure acrylic, and vinyl dispersions

  • Sealants & Construction Materials – Extends usability in grouts, caulks, and water-based sealants

  • Textile Chemicals & Additives – Used in textile finishing agents to prevent microbial contamination

Properties Table

Property Details
Product Name Mergal® 165
Manufacturer Arxada (formerly Troy Corporation)
Chemical Type In-can preservative
Active Ingredients Isothiazolinone blend
Physical Form Liquid
Appearance Clear to pale yellow liquid
Odor Low to mild
pH (as supplied) 9.0 – 10.0
Solubility Fully soluble in water
Density @ 20 °C ~1.04 – 1.06 g/cm³
Flash Point >100 °C
Recommended Use Level 0.05% – 0.20% depending on formulation sensitivity
pH Stability Range 4 – 12
Shelf Life 18 months (in unopened packaging)
Packaging Options 25 kg drums, 200 kg barrels, 1000 kg IBCs

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