Trust in Dartex! Recently awarded coveted ISO9001:2015 standard! Simply the Best! Dartex Coatings has recently been awarded the coveted ISO9001:2015 standard with NO non-conformances of any description and we received a glowing report from the assessor. This means that when you buy any Dartex product the manufacture will have been controlled to the strictest conditions under the latest ISO9001:2015 standard. At Dartex we value every aspect of quality very highly.