Effects of oleochemical hydrophobing agents on plasters - results of a long-term field study

 
Oleochemical additives have been successfully used as hydrophobic agents for mineral-based building materials for many decades. They are characterized by outstanding performance, versatile range of applications and good compatibility with other additives. The high efficacy has been proven by numerous laboratory tests while there is a lack of measurements under field conditions. Our presentation will examine the results of various test specimens with different types of plasters which were exposed to natural weathering for a period of one to three years. These results show that the tested hydrophobic additives based on oleochemicals offer exceptional durability and long-term protection. Many test specimens boast an increase of efficacy during the first 6 months whereas the water absorption of untreated plasters rose up. During evaluation of the test results the differences between the individual plaster types will be discussed as well.