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Old 8th June 2019, 08:09 AM   #6
Bob A
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Join Date: Feb 2014
Posts: 254
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A quick look for black pitch came up empty. Pine tar can be had, but it's viscous liquid at room temperature.

Jeweler's red pitch is available, in pound quantities, but it seems to have a 110 degree F melting point, which might be a little low for the intended purpose.

Information on raising melting points would be of interest.

Sealing wax is readily available.
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