The best under-body sealant we've come across!
Dinitrol 4941 is Thixotropic.
It will harden on the surface, but remains elastic underneath, and if scratched or chipped will heal by creeping back across the gap.
This is a 1l "Shutz" style can and will require a compressed air fed schutz gun to apply.
It can also be applied with a brush if poured into a suitable container.
Please note that we cannot send this with Royal Mail services, nor can we send out of the UK as our carriers wont allow it.