MB original A-Pillar seam sealant and Wurth cavity wax

[Eno]

I am planning to use MB seam sealant on my 1991 Bornite 500E in Qatar.
The old dry sealant is removed and the area on both left and right A-Pillar seams will be cleaned and primed and the OEM MB seam sealant to be applied.

Has anyone used this Wurth Cavity Wax spray inside the fenders areas under the body moldings, in the jack holes and inside the doors, etc etc.
The idea is to coat the insides of areas until the product drips out.