A type of flooring used most often in laboratories, manufacturing facilities, or locations where a non-conducting floor is required.
Rubber gloves
Rubber grout float
Rubber mallet
A mallet with a rubber head, used to apply a blow without damaging a surface.
Rubber test plug
A rubber plug that is used to seal off sections of pipe to allow testing for leakage.
Rubber trowel
The rubber trowel used for grouting. A nonporus synthetic-rubber-faced float that is mounted on an aluminum back with a wood handle. This trowel is used to force material into tile joints, remove excess grout and form a smooth grout finish.
Rubbing stone
Stone, also known as floatstone, which smoothes gauged brickwork.
Rubble
Pieces of brick or stone left over after the destruction of an old structure.
Rubble masonry
Masonry structure constructed of irregularly shaped stones.
