Need help removing roof sealant

[olygene]

My TV antenna shattered and I want to remove the three legs and replace the antenna. I have a 2005 Lexi 255GTS and I think the sealant used was Dicor. I've tried a putty knife but can barely dent the surface. Does anyone know how I can remove the sealant so I can get at the screws holding down the legs? When it's time to reseal, should I use Dicor or some other sealant. Thanks.

[uncle46]

Heat gun and a putty knife worked for me.

[silica]

I just used a knife to slowly get under a portion of dicor then I was able to peal most of it in large chunks

[bob7794]

I would consider Eternabond when resealing.