Erico's Cadwelds have the coarse grain thermite and the fine grain starter
powder in the same little container, with the starter powder in the bottom so
it ends up on top when you pour it in. Problem is that the two can mix in
shipping making them hard to light off. A Cadweld box is marked "this end up"
for a reason. One solution is to use the electric ignition product (available
RF Connections and rent/buy the igniter box) or use another brand, Harger,
which you can get from KF7P. The Harger uni-shots have the two powders
separated so they can't mix in shipment. Having used both, I prefer the
Harger. I use a sparkler on a short stick (and gloves) to light them off.
Shawn
N3AE
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