This is the same epoxy we use in all of our projects and is incredible stuff it is great for filling small to medium size holes, cracks, and adds structural integrity. Very easy to use, it is a simple 1:1 ratio and is packaged in two one gallon jugs for equal parts a and b. Oak city customs is proud of its brand and if there are any issues, concerns, or just general questions about how to use our products please reach out for a response within 24 hours. This item is made of epoxy, plastic and resin.