An F clamp can be a suitable option for securing an exothermic mold. When working with exothermic materials that generate heat during curing or setting, it's important to use clamps that can withstand high temperatures. F clamps, especially those made from heat-resistant materials like certain alloys or coated with materials designed to resist heat, can be appropriate for securing exothermic molds.
However, it's crucial to ensure that the clamp material can withstand the temperatures produced during the exothermic reaction without deforming or compromising its structural integrity. Additionally, consider the size and strength of the clamp in relation to the mold to ensure a secure hold without damaging the mold or affecting the reaction.
Always check the specifications of the clamp and its temperature resistance to ensure it's compatible with the specific exothermic material and process you're working with.