For re-attachment of the plastic 'corner cover' .... 3M "fast cure" # 4200
(After you have repaired the inner structure) 3M's fast cure boar sealant # 4200 is possibly the best material to use in re-attaching the plastic corner piece. It will discolor to a lighter yellow after many years, but my two corners continue to hold firm after may years. No cracks have developed with this sealant, from flexing the shells during road travel and setup/take down. (Some other products might loose flexibility over time not hold up as well.)
I bashed both of my curb-side corners loose within a too-small garage, on different occasions many years ago.
I have also used the Home Depot clone "Loctite PL Marine Sealant" in other jobs, and to replace my roof fan. If you buy it at Home Depot or Lowes, just make sure that the tubes you select can still be pressed-in with your thumb when you buy them -- lots of stock at my local store has been damaged by tiny, invisible bits of exposure to air, or just old age, leaving the tubes fully cured and rock-solid on the inside.
The Loctite version also seems to works well - but I'm unsure about long term discoloration under extended sunlight exposure. With the Loctite version, you need a really good caulk gun, capable of delivering lots of pressure on the bottom of the tube (without busting it's own "disk" off from it's push rod). The stuff is VERY sticky inside the tube, and hard to squeeze out. And be sure to fully pierce the seal at the bottom of the spout, because a single small hole in the middle of the seal will not be adeqaute to allow adhesive flow into the spout.
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TM='06 2619 w/5K axle, 15" Maxxis "E" tires. Plumbing protector. 630 watts solar. 450AH LiFePO4 batteries, 3500 watt inverter. CR-1110 E-F/S fridge (compressor).
TV = 2007 4runner sport, with a 36 volt "power boost".
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