The UK Camp Site , the number 1 camping and caravan resource on the web
                           

Sealants

Sikaflex512 Caravan

Search for Tiger Seal on ebay

Soudal Fix All 

Stixall link

Other sealants you can use for caravans are called polyurethane  Click_here 

Don't use silicone sealant for sealing the outside of caravans

Tube adhesive

Evo_Grip use non solvent type

Gorilla_glue

Fix_all

Roll Mastic

W4_Roll_Mastic , Mastic Sealing Strip