Standard UF Base Coat is the standard base coat for new block applications prior to finishing with an approved top coat.  This can be finished either with a K Rend Dash receiver, Scratch render or JUB thin coat render. 
Approx Coverage: 14-18kg/m² nominal 8-10mm thickness   (approx 1.6m² per bag)

UF Fibre Base Coat is a fibre reinforced version of the Standard UF Base Coat.  It would be used over metal laths and can be used on masonry.  With the inclusion of the fibres, the impact and flexural strength are improved.
Approx Coverage 14-18kg/m² nominal 8-10mm thickness   (approx 1.6m² per bag) 

HP12 is a cement rich base coat normally applied at a thickness of 4-6mm.  It is used over previously painted render with the inclusion of scrim cloth and nylon fixings.  It can also be used as a base coat for tiling and has a high resistence to chlorinated water. 
Approx Coverage 8-11kg/m² nominal 4-6mm thickness (approx 1.8m² per bag)

A very flexible fibre reinforced base coat used over render boards with the inclusion of scrim cloth.  It is normally applied to a thickness of 4-6mm and can be used as a base coat for JUB silicate, silicone and acrylic thin coat renders. 
Approx Coverage 6-9kg/m² 4-6mm thickness (approx 3m² per bag)

This is a basic pre-blended sand and cement base coat.  Used as an internal pargetting render and for basic external base coat applications. 
Approx Coverage 14-18kg/m²nominal 8-10mm thickness  (approx 1.5m² per bag)