Flexible foam formulation

A system comprising a formulation for producing an open-cell flexible foam having a compressive strength of ≤1N/cm2, contained in an aerosol can and a crosslinker sleeve which can be opened prior to deploying the formulation from the aerosol can such that the contents thereof enter the aerosol can, wherein:

• the aerosol can comprises:
• a prepolymer having free isocyanate groups, the prepolymer being prepared from 25 to 35% by weight of diisocyanatodiphenylmethane (MDI) and 40 to 55% by weight of a polyol mixture relative to the total combined weight of all ingredients used to prepare the formulation;
• and
• 10 to 21% by weight of a propellant gas mixture relative to the total combined weight of all ingredients used to prepare the formulation;
• the crosslinker sleeve comprises 4 to 10% by weight of a crosslinker mixture relative to the total combined weight of all ingredients used to prepare the formulation;
• the polyol mixture comprises at least one trifunctional polyether polyol;
• at least one bifunctional polyester polyol;
• a flame retardant;
• a foam stabilizer;
• a cell opener;
• and an amine catalyst;
• and
• the crosslinker mixture comprises ethylene glycol in deficiency relative to the free isocyanate groups of the prepolymer and at least one amine catalyst.