Australian Builders General Blend (GB) Cement is Australia’s favourite Ecoblend Environmental-Choice, GB Cement . Ideal for all kinds of building, construction & cementing project requirements such as fence post footings, re-pointing of brick work, paving, foundations, brick work mortar and the general repairing of concrete. Ideal for all kinds of building, construction & cementing project requirements such as fence post footings, re-pointing of brick work, paving, foundations, brick work mortar and the general repairing of concrete. Australian Builders GB Cement can be used as a binder in concrete, concrete masonry, mortar and grouts. It may also be used in the manufacture of fibre cement products, in soil stabilisation in construction and civil engineering projects.