Mergal® GLT25 is a formaldehyde-free, low-VOC, broad-spectrum in-can preservative designed to safeguard water-based industrial products from microbial degradation. It features an optimized blend of isothiazolinone-based actives, primarily methylisothiazolinone (MIT) and benzisothiazolinone (BIT), delivering effective protection against bacteria, fungi, and yeast. Manufactured by Troy (now Arxada), this preservative is ideal for environmentally responsible formulations that require high performance, regulatory compliance, and low toxicity.

Benefits

• Formaldehyde-Free Composition – Safe for use in eco-label certified products

• Broad-Spectrum Activity – Combats bacteria, mold, and yeast effectively

• Excellent Compatibility – Integrates well into a wide variety of water-based systems

• High pH Stability – Functions efficiently up to pH 10

• Low VOC and Odor – Suitable for indoor-use applications and sensitive environments

• Low Use-Level Requirement – Economical performance without compromising protection

Applications

• Water-Based Paints & Coatings – Ensures microbial resistance in architectural and industrial coatings

• Adhesives & Sealants – Preserves water-based adhesives, caulks, and joint sealants

• Printing Inks – Inhibits microbial growth in aqueous ink systems

• Polymer Dispersions – Used in acrylic, styrene-acrylic, and vinyl polymer emulsions

• Construction Compounds – Suitable for grouts, cement-based systems, and ready-mix mortars

• Pigment Slurries – Stabilizes colorants and pigment dispersions

Properties Table