Rubber flooring can be homogeneous (with colour uniformly distributed through the entire product) or laminated (with patterns and colours only applied to the top layer of the product. It comes in three main types: interlocking tiles, square edge tiles and sheets or rolls.
Interlocking can be installed using a free lay method that does not require adhesive. Instead, they lock together. While this is a somewhat temporary method of installation, the tiles should not shift due to their locking characteristics.
Square edge tiles can be installed through the free lay method as well. However, they typically require an adhesive for permanent installation. They are cut with a sharp edge that is designed to create a virtually seamless finish from one tile to the next.
Rolls are usually glued down in permanent installations. This type of installation can be a large project and may be best handled by a flooring professional.