Many of our customers, especially those in the veterinary field, use our allergens mixed with petroleum jelly/Vaseline for easy application. As a service, we can now prepare this mixture with any product you need. We ensure that the product is evenly distributed throughout the Vaseline. Please note that this is made to order and takes approximately 3-6 weeks to prepare. Feel free to reach out if you have any questions or would like to make a request.