Special additives that speed up and complete the chemical reaction between two or more components involved in a system.

Nachmann provides in particular 6% cobalt octoate dissolved in xylene, generally used for the curing of unsaturated polyester resins .

Typically the cobalt octoate at 6 % is added between 0.1 % and 0.3 % on the total resin weight.

Stored in a cool, dry place, tightly sealed in its container, away from heat and humidity, cobal octoate 6 % has a 6 moths shelf life.