the hydrophilic and lipophilic functions of the surfactant simultaneously maintain a long lasting and uniform dispersion of the silicone composition so the defoaming effect or foam inhibition effect will continue for a long period of time the glycerol aliphatic acid ester which is solid at room temperature may be the monoester diester or triester the aliphatic acid constituting the ester may be a saturated or unsaturated aliphatic acid and in particular higher saturated aliphatic acids such as myristic and stearic acid are preferred concrete examples of the glycerol aliphatic acid esters are glyceryl monostearate glyceryl monooleate glyceryl monomyristate glyceryl distearate and glyceryl dioleate the propylene glycol aliphatic acid ester which is solid at room temperature may be the monoester or diester and the aliphatic acid constituting the ester is a saturated or unsaturated aliphatic acid in particular higher aliphatic acids such as myristic and stearic acid are preferred the monoesters of higher aliphatic acids are generally the most preferred concrete examples are propylene glycol monostearate propylene glycol monooleate and propylene glycol monopalmitate these esters must be solid at room temperature the form of the solid includes granules and powders one species or a mixture of two or more species may be used as the nonionic surfactant when less than 20 wt of the nonionic surfactant is blended it will not have an adequate activity as a solidifying agent when this quantity exceeds 80 wt the defoaming effect is unsatisfactory due to this the blending quantity of nonionic surfactant is 20 to 80 wt and preferably 35 to 65 wt based.