Do Eco-Max products contain Methylisothiazolinone preservative? 10 June 2020 18:04 Updated Eco-Max products do not contain Methylisothiazolinone ("MIT"). Related articles Do Eco-Max products contain enzymes? Do Eco-Max products contain phosphates? Do you have unscented or fragrance-free products? Do Eco-Max products contain synthetic fragrances? What is Potassium Sorbate?