Apart from uses in coatings and adhesives they are also used to enhance the performance of polyester tire cord. Other uses include Powder coatings, Coil Coatings, Cationic Electrocoating and primers. Blocked isocyanates have also been used in tertiary oilfield recovery techniques. A blocked isocyanate is pumped into the rock/geological formation and then an organic compound with an active hydrogen is also pumped down. The result is a polymeric gel assisting with oil recovery. The use of sodium bisulfite as a blocking agent has also allowed them to be used in waterborne resins such as PUDs. Similarly, vanillin maybe used as an isocyanate blocker and is actively being researched. It is then used in single component waterborne coatings.