Pine Rosin is a solid form of resin obtained from pine trees. It is semi-transparent and varies in colour from yellow to black. At room temperature it is brittle, but it melts at stove-top temperature.
Pine resin has a host of different uses, including hobbies/crafts (soap-making, candle-making), sealant, glue, varnish, incense, on stringed instruments, soldering fluxes, health and beauty supplies, home remedies etc
Pine resin is a key ingredient in food wraps it makes the wraps behave more closely to plastic cling wrap, which is what most people are trying to find a replacement for.