A kit of parts suitable for preparing a cured biocompatible polymer material, the kit comprising at least 2 containers each containing a fluid component, which components -when mixed- form a fluid curable biocompatible polymer composition, which upon curing forms the cured biocompatible silicone polymer material, wherein a first container comprises a fluid component A, which component A comprises a. A divinyl substituted polydimethylsiloxane A1 (PDMS A1) having a viscosity between 50 and 600 mm 2 /s (cSt) at 25 °C, b. Optionally a divinyl substituted polydimethylsiloxane A2 (PDMS A2) having a viscosity between 1000 and 20000 mm 2 /s (cSt) at 25 °C, c. A Pt catalyst soluble in Polydimethylsiloxane (PDMS) d. A hydrophobic fumed silica FS A having been partially surface treated e. Optionally a crosslinker A3 having more than 2 vinylgroups per molecule and wherein a second container comprises a fluid component B, which component B comprises, f. A dihydride substituted polydimethylsiloxane B1 (PDMS B1) having a viscosity between 50 and 600 mm 2 /s (cSt) at 25 °C, g. Optionally a dihydride substituted polydimethylsiloxane B2 (PDMS B2) having a viscosity between 1000 and 20000 mm 2 /s (cSt) at 25 °C, h. A hydrophobic fumed silica FS B having been partially surface treated i. a crosslinker B3 having more than 2 hydrosilyl groups, wherein the amount of polydimethylsiloxane A1 is at least 70 wt% relative to the total of PDMS A1 and PDMS A2, wherein the amount of PDMS B1 is at least 70 wt% relative to the total of PDMS B1 and PDMS B2, wherein the amount of crosslinker A3 ranges between 0 and 10 wt% relative to the weight of component A, wherein the amount of FS A and FS B ranges between 2 and 30 wt% relative to the total weight of component A + component B, wherein the volume to volume ratio of component A: component B is in the range of 1:3 to 3:1, wherein the components A and B are both fluids, having a viscosity between 10 and 200 Pa.s at a shear rate of 1 s -1, and a viscosity below 2 Pa.s at a shear rate of 600 s -1 and wherein components A and B when mixed form a composition having a viscosity of at least 10 Pa.s when sheared at 1 s -1, and a viscosity below 2.7 Pa.s when sheared at 600 s -1, and wherein the viscosity of the composition recovers to a value of at least 10 Pa.s when high shearing is stopped with a recovery time of less than 60 sec, wherein the viscosity is determined according to with a Haake VTiQAir rheometer at 37°C. a. A divinyl substituted polydimethylsiloxane A1 (PDMS A1) having a viscosity between 50 and 600 mm 2 /s (cSt) at 25 °C, b. Optionally a divinyl substituted polydimethylsiloxane A2 (PDMS A2) having a viscosity between 1000 and 20000 mm 2 /s (cSt) at 25 °C, c. A Pt catalyst soluble in Polydimethylsiloxane (PDMS) d. A hydrophobic fumed silica FS A having been partially surface treated e. Optionally a crosslinker A3 having more than 2 vinylgroups per molecule and wherein a second container comprises a fluid component B, which component B comprises, f. A dihydride substituted polydimethylsiloxane B1 (PDMS B1) having a viscosity between 50 and 600 mm 2 /s (cSt) at 25 °C, g. Optionally a dihydride substituted polydimethylsiloxane B2 (PDMS B2) having a viscosity between 1000 and 20000 mm 2 /s (cSt) at 25 °C, h. A hydrophobic fumed silica FS B having been partially surface treated i. a crosslinker B3 having more than 2 hydrosilyl groups, wherein the amount of polydimethylsiloxane A1 is at least 70 wt% relative to the total of PDMS A1 and PDMS A2, wherein the amount of PDMS B1 is at least 70 wt% relative to the total of PDMS B1 and PDMS B2, wherein the amount of crosslinker A3 ranges between 0 and 10 wt% relative to the weight of component A, wherein the amount of FS A and FS B ranges between 2 and 30 wt% relative to the total weight of component A + component B, wherein the volume to volume ratio of component A: component B is in the range of 1:3 to 3:1, wherein the components A and B are both fluids, having a viscosity between 10 and 200 Pa.s at a shear rate of 1 s -1, and a viscosity below 2 Pa.s at a shear rate of 600 s -1 and wherein components A and B when mixed form a composition having a viscosity of at least 10 Pa.s when sheared at 1 s -1, and a viscosity below 2.7 Pa.s when sheared at 600 s -1, and wherein the viscosity of the composition recovers to a value of at least 10 Pa.s when high shearing is stopped with a recovery time of less than 60 sec, wherein the viscosity is determined according to with a Haake VTiQAir rheometer at 37°C. wherein the amount of polydimethylsiloxane A1 is at least 70 wt% relative to the total of PDMS A1 and PDMS A2, wherein the amount of PDMS B1 is at least 70 wt% relative to the total of PDMS B1 and PDMS B2, wherein the amount of crosslinker A3 ranges between 0 and 10 wt% relative to the weight of component A, wherein the amount of FS A and FS B ranges between 2 and 30 wt% relative to the total weight of component A + component B, wherein the volume to volume ratio of component A: component B is in the range of 1:3 to 3:1, wherein the components A and B are both fluids, having a viscosity between 10 and 200 Pa.s at a shear rate of 1 s -1, and a viscosity below 2 Pa.s at a shear rate of 600 s -1 and wherein components A and B when mixed form a composition having a viscosity of at least 10 Pa.s when sheared at 1 s -1, and a viscosity below 2.7 Pa.s when sheared at 600 s -1, and wherein the viscosity of the composition recovers to a value of at least 10 Pa.s when high shearing is stopped with a recovery time of less than 60 sec, wherein the viscosity is determined according to with a Haake VTiQAir rheometer at 37°C.