Jealous Devil BOOM! Firestarters patent-pending shape and formula ensure maximum performance. BOOM! Is waterproof, burns for over 20 minutes with a clean and odorless burn. No black or acrid smoke or strong odors typical of most other firestarters on the market. A single BOOM is equivalent to 4-6 traditional starters. Never use multiple firestarters again. No matter if it’s briquettes, lump or log charcoal, a single BOOM is all you need to get rolling.