Not sure where on the car it is pal but it has to come out, it'll spread if you don't. If in doubt, cut it out.
1990 325i Cab auto in Alpine White II
1988 Alpina C2.5 moredoor in Black, 71k
1990 325ix, moredoor auto in Laser Blue. 51k
1984 Hartge H35 in Black
2004 996 C4S in Silver 43k manual
2006 Audi S6 V10 in Black 58k
Is that the securing tabs for front wings against the bulkhead area ?
1990 325i Cab auto in Alpine White II
1988 Alpina C2.5 moredoor in Black, 71k
1990 325ix, moredoor auto in Laser Blue. 51k
1984 Hartge H35 in Black
2004 996 C4S in Silver 43k manual
2006 Audi S6 V10 in Black 58k
Remove the felt pad and electrolysis will deal with most of that, then after thorough drying out and painting, prop the roof upside down, fill it with Waxoil and then use a heat gun to melt it into every hidden corner and seam. Drain the excess, clean where the pad fits, glue it in place and refit.
I just got it!!! Best one around, was owed it really(long story) Much better than mine but it's a shame as other 5 tabs really good and not attacked the underneath of the outer skin.