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A Rubber Block is a block type in Bloons and Bloons 2. When a dart hits the Rubber Block it bounces off it going the opposite direction. They can be very useful at some situations but annoying at others. They are good for aiming in tricky areas. Rubber Blocks can also appear as angled blocks, bouncing to the angled way depending on how the block is placed. In Bloons 2, the triangle rubber blocks replaces the angled blocks.