The only collated screws that Siniat currently offer are the Siniat Collated Wet Area Screws. 

Where Siniat do not have collated screws in the range, the following can be advised around the warranty status:

The Siniat Lifetime Performance warranty will be valid for systems which use a 3^rd party collated screw - providing they are fully compliant with BS EN 14566:2008 A1 Revision 2009 and are the correct length for the application and comparable diameter. Siniat cannot guarantee that the screws are fully compatible with Siniat Plasterboards as they are not tested with other manufacturers products. Customers are recommended to trial the screws and seek manufacturers guidance if required. 

Reputable manufacturers of screws include Evolution, Fischer, Hilti and Sympafix.