Cast gutter sealant?

8 Feb 2010
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United Kingdom
Can some recommend a sealant for cast iron gutter. After cleaning the gutters, I've noticed a couple of sections are now leaking - never had this problem in the past after removing debris.

There doesn't appear to be fixings securing the sections - not sure why, the sections have been in place for ~ 40 years trouble free.

Is this any good - i note reports its messy...
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Yeah the tar like stuff will do it. The best stuff though is if you can get a small tub of acrypol and paint it over the joint, it's great for sealing cast gutters.
The cast would have originally been bolted together with putty joints.
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