Rubberwood is a tree added by Redpower, not to be confused with Rubber trees from Industrial Craft. They are only in the Jungle biome. They are incredibly huge, having a 3 by 3 trunk and being fire resistant, they are hard to remove if not using a Dark Matter Axe or a Thuamcraft Axe of the Stream. Said Axe will likely be worn down to very low durability. They are an excellant source of sticks or charcoal, as one log is worth 8 sticks, and due to the size of the tree, the amount of logs is incredible. Each log can be placed in an Extractor to obtain rubber. Players often use these trees to make tree-houses.