I have been asked to rectify some fire foam work that was carried out by another contractor. I have always been taught  that any aperture over 50mm that foam should not be used and instead the use of a mineral fibre(batts) used in conjunction with intumescent mastic and an ablative paint. 

Is this information outdated ? as i know that various foam products are now available. also what is the life span of the older foam products (i know this is a hard question to answer not knowing the make or spec) 

Could you give some information on any products that would be a suitable product please 

thanks in advance 

Personally I hate this stuff, it is very rarely used correctly. The rule of thumb is that when installed the depth should be at least 10 times the width, basically narrow linear gaps.  If you do use it then you must get the certfire certificate for the product to see how it should be installed and the gaps that it can seal.

If you don't know what to use, perhaps an accredited passive fire protection specialist should be involved. The cheap & nasty aerosol fire foams usually have really narrow test scope, usually limited linear gaps between floors and walls, or walls and door frames and no type of service penetration.
Proper non aerosol foaming products exist that can do service penetrations and very large gaps but require correct application & equipment (& cost far more).

If in doubt as to the choice of systems (often there is more than one option) then this is very useful - https://firestop.hilti.com/selector