In one aspect, a downhole device for use in a downhole environment is disclosed, including: a first material with a first degradation rate in the downhole environment and at least one cavity, wherein the at least one cavity contains a second material to degrade the first material at a second degradation rate when the second material is exposed to the downhole environment and the first material, the second degradation rate being higher than the first degradation rate. In certain embodiments, the second material is a solid second material. In certain embodiments, the second material is a gel second material. In certain embodiments the downhole device further includes a protective material to control exposure of the second material to the downhole environment.