Underseal.

[trickydicky]

Hi .what is the best undersael for an old van is Schutz a good product if not what is?thanks.

 

[Billybob56]

I use Dinitrol HS3125 it’s available in Schutz cartridge or aerosol

 

[Gromett]

Fluid film or Lanoguard.

 

[Terry242]

I'm old school, I use Waxoyl
Whilst I've re-done mine in it's 4th and 8th year, some other products advise check/reapplying every year.