Rusted Block

 is a block in Build A Boat For Treasure. It is slightly stronger than Wood and Stone, but will still break easily. It is usually found in Uncommon to Legendary Chests.

This block is rarely used by more experienced players due to its less appealing, deteriorated look when placed in boats, and the dislike for the block when the players realize its low hitpoints. Furthermore, it requires 7 balloons to lift it (just like Titanium), rendering it heavy.

This is however can be used to make the appearance of old or damaged boats.

It was in the Shop for a day after the 7/4/19 update but is now in the shop permanently as a package of 50 Rusted Blocks for 300 Gold.

Trivia

 * This block may also refer to real life rust, where an oxidation forms due to iron reacting with oxygen, causing metal to color brown or orange.
 * Because of how early players can get this block, new players often heavily include this block in their boat in an effort to make their boat sturdy as possible.
 * Blocks touched by rocks, pipes, and acid rain in the Industrial Terrain gain the rust texture, and look like . This does not affect the hitpoints of the block, only its appearance.
 * This block is not recommended to be painted, as it only affects the "non-rusted areas" of the block. The areas that appear rusted is not affected using paint.