The Top Interlocking Bricks Manufacturers in the Industry When it comes to interlocking bricks, quality is key. Fortunately, there are several manufacturers in the industry who take great pride in producing high-quality interlocking bricks that meet and exceed industry standards. One of the top manufacturers is Hydraform, a South African company that has been around since 1988 and has become a global leader in the production of interlocking building systems. Another top manufacturer is Eco Cell Industries