"Home Guy" wrote in message
...
John wrote:

I have a number of leaks at joints that I have tried to fix but
there is so much old sealant already there that applying more
just doesn't work.

A wire brush drill attachment:

http://images50.fotki.com/v1559/phot...eDIY046-vi.jpg

Or maybe a smaller one for a Dremel tool (if you have one).

Other than a sharp putty knife, you might want to try gasoline or laquer
thinner.

I have my doubts about the heat-gun. You might also look at a plumbers
torch.

I really don't know how these silicone or latex sealants react to
extreme heat.

Great advice, try gasoline or lacquer thinner, then use a plumbers torch.
LMAO! Idiot!