Petroleum jelly is unable to detonate without the use of a blasting cap. It was used as a stabiliser in the manufacture of the propellant Cordite. Petroleum jelly can be used to coat the inner walls of terrariums to prevent animals crawling out and escaping. A stripe of petroleum jelly can be used to prevent the spread of a liquid. For example, it can be applied close to the hairline when using a home hair dye kit to prevent the hair dye from irritating or staining the skin. It is also used to prevent diaper rash. Petroleum jelly is used to gently
Grass jelly water. Jelly produced in this way has been described as having a leafy neutral or plain flavor. In Mainland China, Hong Kong and Macau, grass jelly was traditionally served with sugar syrup. Now it is often served mixed with other ingredients, such as mango, sago, watermelon, cantaloupe, and other fresh or canned fruit, and condensed or evaporated milk. Although this dish is sometimes called "liangfen" ("leung fan") in Chinese, it should not be confused with the Chinese starch jelly "liangfen", which is an entirely different dish. Grass jelly is known as "cincau" in Indonesian (it means green grass in Chinese).