Profile: Mona Precast (Anglesey) Ltd. produces concrete blocks, bricks & paviours for the construction and domestic industry. Paving products are available in brindle, terracotta, buff, charcoal natural and slate blue colors. We also produce kerb and channel units which are specifically designed for use with our paviours. Concrete building blocks include split face blocks & quions, fair finish blocks, coursing bricks, monacrete blocks and GPI blocks.