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MERCOOL EME 1304 does not contain any palm oil. What it does contain though, as Bernd already mentioned, is rape seed oil. And using a product containing fatty acid or ester for punching and sawing will always bear the risk of foam build up and formation of residues under certain environmental conditions. We still believe that the product based on polymer technology, MERCOOL BS 4300, would have been a good option. But if the customer wants to stay with an ester – based coolant, then we would like to recommend MERCCOL ZME 2996. This is an ester based product as well. It’s likely to show a tendency of foam build up as well, but it shouldn’t be too severe, and you could harden up the water a bit as a countermeasure.
You will find the technical information on the ZME 2996 attached. In case you decided to go into a trial with this product at NRB, we would offer you to include one drum of this product free of charge with your next purchase order.