A later development is the 2K (two component) aerosol spray, with a main component stored in a main chamber, and a second component stored in an accessory container. When an applicator activates the 2K aerosol by breaking the accessory container, the two components mix. The 2K aerosol can is advantageous for delivery of reactive mixtures; for example, a 2K reactive mixture can use low molecular weight monomer, oligomer, and functionalized low molecular polymer to make a final cross-linked high molecular weight polymer. A 2K aerosol can increase solid contents and deliver high-performance polymer products, such as curable paints, foams, and adhesives.