While this product is fire-retardant and is of the heaviest thickness we offer for a tarp, it is not necessarily intended for the usage you are describing here. As such, we cannot recommend that you use this tarp over an open fire. However, of all of the products we carry, the tarp you have chosen would be the most likely to stand up to this use. Please be aware that if the tarp is not set high enough above the fire so as to not accumulate a large amount of heat, it will combust.
Justin R. - eCanopy Product Specialist
on March 8, 2016