Sealing a side panel on screwless cargo trailer

[FR CTC]

I did not find a sticky so I thought I’d ask here.

My used Haulmark CTC is the fastener less skin variety and I had a spot come loose. Actually the previous owner had a bunch of areas fixed under warranty from what I can tell. Now I have a spot and it’s leaking in.

Haulmark pointed me to this item, but it only comes in a sausage pack and I need to seal a small area:

TremPro® Chem-X® Pro is a multi-purpose, non-sag hybrid polymer adhesive designed to bond to a variety of substrates that are commonly found in manufacturing and construction.

So what is a good sealant to use instead of? I? Not familiar with hybrid polymer sealants. Tremors seems to have a very high elasticity but obviously it failed. Any recommendations? And what is a hybrid polymer sealant?