Tear Mender works wonderfully as a glue used to train dogs ears to tip or stand. Tear Mender ear glue is a non-toxic, quick drying, water-proof and flexible formula which allows you to set puppy ears without irritation. Tear mender dries quickly, is UV resistant, non-toxic and acid free. This solution for training your dogs ears is made from renewable resources and has minimal impact to the environment. While Tear Mender harmlessly rubs off fingers, this product does contain natural latex which may cause allergic reaction.