People bring sticks, especially oaken sticks, char them in the fire, and then carry them home and keep them in the house as a preservative against lightning.
When the fire died down people took some of the ashes home with them, either to keep them in the house as a preservative against thunder or to scatter them on the fields for the purpose of destroying corn-cockles and darnel.
And for the same reason they stick burs and mugwort on the gate or the hedge through which the cows go to pasture, because that is supposed to be a preservative against witchcraft.
They esteemed it a preservative against witchcraft, and a sovereign remedy against malignant diseases, both in the human species and in cattle; and by it the strongest poisons were supposed to have their nature changed.
A skein of red wool wound about the arms and legs is thought to ward off agues and fevers; and nine skeins, fastened round a child's neck, are deemed a preservative against scarlatina.
They esteemed it a preservative against witch-craft, and a sovereign remedy against malignant diseases, both in the human species and in cattle; and by it the strongest poisons were supposed to have their nature changed.
So the Cornish Milpreve, or adder stone which is a preservative against vipers, is a ball of coralline limestone, the sections in the coral being thought to be entangled young snakes.
Sir Thomas Brown would not deny that bezoar was antidotal, but he could not bring himself to believe that "sapphire is preservative against enchantments.
It was also regarded in Scotland as a preservative against witchcraft; and eyes bathed in it were rendered for life incapable of seeing ghosts.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "preservative against" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.