Sealing seams

The new front panel needs its seams sealed so that moisture does not get between the layers so taking advice from this site I bought some of this:

As recommended, a chopped-off paint brush works well to apply this thick grey gunge.

The best technique seems to be to apply thickly with the brush, not worrying too much about how even it is but pushing well into the seam. Then using rubber gloves dip you fingers in GP thinners and smooth over the joint; it quickly makes a nice smooth finish.

The picture is not very good but shows the interior seam across the front of the floor pan. I think I went over that again with the thinners and got a better result after the picture was taken.