How to set different permissions for files and directories?

Mounting Seadrive with

/usr/bin/seadrive -f -o umask=002 ...

it is possible to set default permissions for files and directories. But what if I need to set different permissions for files than for directories?

Some fuse implementations have fmask and dmask, but seems like Seadrive is not taking those options. It goves the following error

fuse: unknown optiondmask=002’`

This is not supported at the moment…