Overview

Mergal® 721K3 is a broad-spectrum, formaldehyde-free in-can preservative developed for high-performance protection of aqueous systems. It combines the antimicrobial power of 1,2-Benzisothiazolin-3-one (BIT) with a carefully balanced formulation to prevent spoilage caused by bacteria, yeast, and mold. Designed for applications requiring low VOC, low odor, and wide pH compatibility, Mergal® 721K3 is ideal for environmentally conscious formulations in paints, adhesives, inks, emulsions, and construction products. Manufactured by Arxada (formerly Troy Corporation), it supports global regulatory compliance while offering robust preservation performance at low use levels.

Benefits

• Formaldehyde-Free – Ideal for formulations aiming to meet stringent environmental and health regulations

• Broad-Spectrum Activity – Effective against bacteria, mold, and yeast for comprehensive in-can protection

• Low VOC and Odor Profile – Suitable for indoor-use formulations requiring minimal emissions and smell

• Stable Over Wide pH Range – Maintains efficacy from acidic to alkaline environments (pH 4–10)

• Low Use Level Efficiency – Cost-effective performance with minimal impact on the final formulation

• Compatible with Diverse Formulations – Easily integrates into complex aqueous systems without destabilizing them

Applications

• Paints & Coatings – Ensures microbial stability in water-based emulsion paints and architectural coatings

• Adhesives & Glues – Prevents microbial spoilage in aqueous adhesives, including PVA and acrylic-based formulations

• Polymer Dispersions – Protects synthetic polymer emulsions such as acrylics, styrene-acrylics, and PVAc systems

• Printing Inks – Stabilizes water-based ink formulations against bacterial and fungal contamination

• Sealants & Construction Chemicals – Used in joint sealants, grouts, tile adhesives, and admixtures

• Pigment Slurries & Fillers – Prevents degradation in aqueous slurry and filler systems used in coatings and plastics

Properties Table