Hot spring also uses it on the limelight series. I am a Caldera dealer and asked that question to my Watkins rep (also the hot springs rep). He told me it's because the high life spas aren't self supporting and need the rigid foam to hold the spa together. I'm guessing that isn't the exact entire truth as I'm a Caldera dealer not a HS dealer. My customers that have tubs with fibercor seem pretty pleased with their overall operating costs.
Thank you for the info. Do you think the high life spas have a thinner shell? The reason the fibercor isn't used on the higher range can't be because its just some economy option. I look forward to having a spa with it. If nothing else, it sounds incredibly good to have in case of leaks!
I'm mostly just researching everything I can think of because I've been waiting for my Kauai far too long at this point. Its
finally going to be here late this week. I'm so excited!