ideally the substance would be a gel that is stable but pliable so as to not resrict movement or cause imbalanced my movement of the substance like a liquid does. and it must be in this gel state at room temp.
i was just wondering if anyone had a list of the densest/heaviest liquids/gels that are not harmful with the main aim to add weight to something without a need for any saftey equipment i.e. ventilation or protective clothing etc.
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