A consumer product composition comprises a non-porous dissolvable solid structure comprising from about 30% to about 95%, by weight of the consumer product composition, of a carrier material, and from about 5% to about 50%, by weight of the consumer product composition, of a hydrophobic conditioning agent disposed within the carrier material of the non-porous dissolvable solid structure. The carrier material comprises a polyethylene glycol material, or mixtures thereof, having a molecular weight of from about 200 to about 50,000. The hydrophobic conditioning agent is selected from the group consisting of silicone materials, organic conditioning oils, hydrocarbon oils, fatty esters, metathesized unsaturated polyol esters, silane-modified oils, and mixtures thereof. Preferred products are shampoos, hair conditioners, laundry detergents and fabric softeners. Preferably the conditioning agent comprises a silicone or polyisobutene. The conditioning agent is preferably disposed in the carrier as particles having a mean particle size of 2 to 2000 microns. A method of treating a surface comprises dissolving the consumer product composition in an aqueous solution to form an aqueous treatment liquor and contacting the surface with the liquor.La présente invention concerne une composition de produit de consommation qui comprend une structure solide soluble non poreuse, comportant denviron 30 % à environ 95 %, en poids de la composition de produit de consommation, dun matériau de support, et denviron 5 % à environ 50 %, en poids de la composition de produit de consommation, dun agent de conditionnement hydrophobe disposé à lintérieur du matériau de support de la structure solide soluble non poreuse. Le matériau de support comprend un matériau de polyéthylène glycol, ou des mélanges de celui-ci, présentant un poids moléculaire allant denviron 200 à environ 50 000. Lagent de conditionnement hydrophobe est choisi dans le groupe constitué par des matériaux de silicone, des huiles d
