High integrity encapsulation product

A method of making a particulate extrusion encapsulation product comprising:

• (i) in an extruder assembly, mixing and melting matrix components comprising a matrix and an encapsulate to form a viscous dispersion, (ii) shaping, extruding, and die-face cutting the viscous dispersion to obtain a particulate extrusion encapsulation product, and (iii) drying and cooling the particulate extrusion encapsulation product to a glassy state, wherein the matrix components additionally contain about 0.5% to about 10% by weight of at least one insoluble fiber selected from the group consisting of apple fiber, corn fiber, sugarcane fiber, oat fiber, wood fiber, rice fiber, and mixtures thereof, wherein the average size of the fibers is about 20 to about 300 microns, and wherein at least 80% of the particles in the particulate product are unbroken after at least two weeks storage of sealed samples at ambient temperature, based on total number of particles in the particulate product, resulting in improved structural integrity of the product as compared to said product which does not contain the at least one insoluble fiber.