Browse our products by application OR simply search for a product by name:

Asconium® 500 - Easy to introduce water-based corrosion inhibition and adhesion promotion

eye 2 Minute Read eye By Ian Brown
Metal being painted onto for corrosion inhibition


Asconium® long-term corrosion inhibitors have always delivered significant advantages over inorganic inhibitors. With no milling required, Asconium® grades are easier to incorporate into formulations and offer better gloss retention, fewer labelling requirements and improved performance for both salt spray and anti-blistering. They have also been widely adopted in the most modern water-based direct-to-metal primer applications. However, to achieve the best Asconium® performance, there have historically been certain procedures to follow in terms of order of addition and possibly pre-neutralisation.

To enhance the ease of use of Asconium® inhibitors, ASCOTEC have developed Asconium® 500 which delivers the coatings formulator several advantages:

  • Asconium® 500 can be added at any time during manufacture, even post-addition without loss of performance
  • VOC free
  • Wide compatibility with most commercially available water-based polymers
  • Low dosage
  • Up to C5 corrosion class performance depending on the binder and formulation


Starting Point Formulations

White DTM Water-Based Coating in AC2403

Add in order with good agitation:
Water 2.50 %
Binder - AC2403 34.50 %
Dispersing Agent - EDAPLAN 490 1.00 %
Defoamer - Agitan 762 0.10 %
Neutraliser 0.17 %
White pigment 15.00 %
Disperse with high shear rate for 10-15 mins, then add progressively:
Co-solvent 4.00 %
Water 6.15 %
Binder - AC2403 34.40 %
Defoamer - Agitan 762 0.15 %
Wetting Agent 0.18 %
Flash-rust inhibitor - ASCOTRAN-H10 0.60 %
Disperse with high shear for 5 mins, then add progressively:
Thickener - Tafigel PUR 85 0.50 %
Anticorrosion additive - ASCONIUM-500 0.75 %


White DTM Water-Based Coating in EPS595

Add in order with good agitation:
Water 4.52 %
Thickener - Tafigel PUR 85 0.35 %
Dispersing Agent - EDAPLAN 490 0.65 %
Defoamer - Agitan 762 0.19 %
Neutraliser 0.20 %
White pigment 17.98 %
Disperse with high shear rate for 10-15 mins, then add progressively:
Binder - EPS595 61.72 %
Water 8.40 %
Defoamer - Agitan 762 0.15 %
Coalescing Agent 3.69 %
Flash-rust inhibitor - ASCOTRAN-H10 0.60 %
Disperse with high shear rate for 5 mins, then add progressively:
Thickener - Tafigel PUR 85 0.30 %
Anticorrosion additive - ASCONIUM-500 1.25 %

Ascotec have conducted extensive studies using polymers from the most prominent resin manufacturers which have confirmed the performance of Asconium® 500 and its near-universal compatibility in water-based acrylic resins, water-based alkyd polymers and water-based epoxy resins and a good number of validated starting point formulations are already available.

If you are looking to keep ahead in the water-based direct-to-metal primer market, please contact us. We will be pleased to help you maintain your competitive edge.


Headshot of Technical Sales Manager, Ian Brown
Ian Brown, Technical Sales Manager

Coatings and Adhesives

Ian has a technical background in Chemistry and Materials Science, having studied at the University of Greenwich and then having worked in a technical capacity for both the MOD and Synthomer. Since then he has held various sales positions and is now one of the longest-serving members of our Technical Sales Team specialising in the Coatings, Adhesives and Graphic Arts sectors.

arrow View All Articles By Ian Brown
Share this article
You might also be interested in...
Carmine free pink and purple powder on black background
eye 2 Minute Read

Embracing Vibrancy with Carmine-Free Pigments: The Geopearl® C Crystal Super Deep Collection

In the ever-evolving world of cosmetics, the quest for vibrant, eye-catching colours that are both ethically sourced and environmentally friendly has led to significant innovations in pigment technology. GEOTECH’s latest offer, the Geopearl® C Crystal Super Deep Pink and Purple pigments, represents a leap forward in combining high-impact colour with a commitment to cruelty-free and vegan product formulations.

Arrow Continue Reading...