A viscous aircraft exterior cleaner engineered for difficult to clean areas, including wheel well/ wing butt areas.  It effectively clings to vertical and inverted surfaces without run-off.  

Commercial
Bombardier Aerospace, No Technical Objection Memo, Alternative Aircraft Cleaning Products Ref MPE/FS/05/004

Testing
Boeing D6-17487
Douglas CSD #1 Cadmium Removal testing
MIL-C-85570, Type V