Rubber Sapling is the IndustrialCraft 2 sapling that grows into a Rubber Tree, the renewable source of Sticky Resin and Rubber Wood. Players obtain Rubber Sapling by breaking Rubber Tree Leaves, which drop the sapling at roughly a 5% chance per leaf block, similar to vanilla saplings. Place Rubber Sapling on Dirt or Grass with a light level of at least 9, and it will grow over time into a full Rubber Tree. Bone Meal accelerates Rubber Sapling growth just like with vanilla saplings, which is useful when planting tree farms. Once the Rubber Tree is mature, its trunk shows special Resin Holes that can be tapped with a Treetap to extract Sticky Resin without destroying the wood. Sticky Resin is then smelted or processed in an Extractor into Rubber, the backbone material of IC2 cable insulation and many machines. Rubber Sapling itself is not used in any crafting recipe — its value is entirely as a planting item. Keeping a small Rubber Sapling farm near a base gives a stable supply of Rubber Wood and Sticky Resin for the rest of the IndustrialCraft 2 tech tree. Rubber Sapling stacks to 64 and can be stored in any chest or inventory slot.