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Sorry, wrong on both accounts. Paste was a mixture of materials that were non-magnetic...they were also not flammable
I agree, but as far as I know the Germans
thought it was flammable, discontinued applying it to afvs and then realized it wasn´t flammable. Besides they also noticed the allies didn´t use magnetic mines as often as the Germans...
Zimerit was officially introduced on 29th December 1943, but it is surmised that it was used since October 1943 already.
The first layer was meant to be 5mm thick and had to dry for 24 hours (shorter if it was dried using a blowtorch or bunsen burner).
After that another Layer of approximately 3mm was applied in that famous corrugated shape.
Zimmerit (manufacutred by a Company called "Zimmer") consisted of:
40% Barium sulfate
25% "Mowilith"
15% Ocre colour
10% Zinc sulfide
For a Panzer III you needed approx. 96kg
Panzer IV 100kg
Panther 160kg
Tiger 200kg
In August 1944 there were rumours the Zimmerit would be flammable - it was discontinued on 7th September 1944.
(Info from: "Tarnanstriche des deutschen Heeres 1914 bis Heute" by Johannes Denecke, ISBN 3-7637-5990-5)
Best Wishes,
ekke