We, as Akfixstore, have not used this product in relation to hot items. However, if the hot things were not going on the marble directly from the oven (baking pan), there may be no adverse reactions. We have two marble statues that were repaired and sit on a mantle in front of a gas fireplace used during the winter (3-4yrs), and they remain intact. We are assuming that the pastry board will remain stationary during use.