Body filler in the trunk?

No body filler as its not water proof, use seam sealer or super urethane.


Seam sealer:
http://3mcollision.com/products/sealants/3m-urethane-seam-sealer-grey-310ml-cartridge-08362.html

Super fast urethane:
[ame]http://multimedia.3m.com/mws/media/107695O/3mtm-super-fast-urethane-08609.pdf[/ame]