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High-Temp Filler Material

We recently have changed over to powder coat application. The problem now is the filler or putty cannot stand up to the 400°F for curing our powder. Is there something out there that is conductive, reach full strength in a minimum of time and to withstand the 400°F heat for the paint to cure?

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Q. We currently put together steel frames, which are then bolted together. We use a putty and filler so there are no holes or bolt heads showing and then we wet spray the frame. The frames are in a vibrating environment and we need the filler or putty to be hard enough so there will be no chipping or cracking. We recently have changed over to powder coat application. The problem now is the filler or putty cannot stand up to the 400°F for curing our powder. Is there something out there that is conductive, reach full strength in a minimum of time and to withstand the 400°F heat for the paint to cure? E.L.

 

A. The filler material that has worked for many other powder coaters is “Lab Metal” from Alvin Products. It is aluminum based, conductive and handles the temperatures necessary to cure a powder coating without out-gassing, cracking or flaking. It can be sanded smooth after application and prior to powder coating providing an invisible surface appearance. I hear that another filler material called Dura-Bond (manufacturer unknown) can work as well, but I have no personal experience using it. 

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