Just wondering what sort of sealant would be best for around and on the set of lights on the back of my caravan. Have found that is where I am getting water leaking into the bottom of the cupboard inside. Have narrowed it down to the light. There is signs of the sealant having a gap but also a very fine crack about 20cm long in the black plastic of the light.
I would use Sikaflex "Construction AP" or Sikaflex "Pro". Good adhesion, good UV stability, paintable.
Silicone is banned on out vehicle.
Cheers,
Peter
I had a similar problem and agree with Peter, use Sikaflex. To do a nice neat job I used masking tape either side of the joint, about 3mm either side, applied the Sikaflex and then ran my finger along the joint to smooth it out. I then removed the masking tape straight away and the seal looked like a neat gasket.
Cheers
Steel Dog