What Does
Long Oil Alkyd Mean?
A long oil alkyd is a chemical substance used for material coating and finishing. Long oil alkyds contain a significant amount of oil (over 55 percent), which assists smooth brushing and application to surfaces.
Corrosionpedia Explains Long Oil Alkyd
A long oil alkyd can be applied to wood surfaces for protection and to metal surfaces for corrosion prevention. It does this by acting as a film forming agent due to its polyester component.
Long oil alkyds were first developed in 1921 as a flexible and more consistent alternative to other paints available at the time. However, long oil alkyds dry by oxidation. The oxidation continues for the entire lifespan of the applied long oil alkyd, which reduces its flexibility.