If it's anything like the other Sika products, it will be good. I've used Sikaflex rapid cure for years, in many different applications and it's never let me down. My brother even uses it to glue his motors directly to his hull. Makes for a strong, vibration damping motor mount.
I would suggest that you try putting just a little in a cup or something and letting it set up, before you pour a batch in your hull. We have tried several different types of the self-leveling stuff here, and a couple were not really usable. One was hard as a rock and heavy when cured. But I can't remember which one it was. Just a thought. Mikey
Don't put it on too thick (test in cup) or it takes forever to cure.... I used multiple coats in the Karlsruhe
The PL brand normally takes a few days for a 3/8" thick layer to fully set up. It normally skins over in 24 hours.
Comparing the Material Data Sheets for the SikaFlex vs the Loctite PL, it looks like the Sika will cure a bit harder than the PL and be a bit denser. Not sure if it'll make a major difference.
The stuff that I have been using is the PL that Nick just posted above. Although addmittedly, the tube that I have does not actually say Loctite on it. It has a small black label on the back that says Henkel. I am guessing that it is the same stuff, but is now made by Loctite. I generally try to keep mine less than 1/4" thick so that it sets up in a reasonable amount of time. Mikey
The PL feels like a soft rubber, and is not too heavy when it is cured. One of the other brands that we used early on, was hard as a rock, and weighed perhaps twice as much. Mikey