Its very good though and ive never seen anything else on the market as thin as it. Its used in bodyshops to rust proof repairs for warranty purposes.
If you have an account with Wurth it is cheaper - they do a lot of other unique stuff also like the electrical contact cleaner with an acid suspended in dielectric grease, or the spray grease suspended in solvent so it cleans out then leaves a high quality grease behind - after using some of the Wurth products you you will find it difficult not to keep using them.