Finishing paint material for outer heatproof layer of solid rocket engine, and preparation method and application thereof

The invention provides a finishing paint material for an outer heatproof layer of a solid rocket engine, and a preparation method and an application thereof. The finishing paint material comprises a component A and a component B, wherein the component A comprises a base material with a weight accounting for 75-80% of the total weight of the component A and a pigment with a weight accounting for 20-25% of the total weight of the component A; the base material comprises the following components in parts by weight: 50-60 parts of an organosilicone-based adhesive, 5-10 parts of a reinforcing agentand 3-5 parts of a delustering agent; and the component B comprises a cross-linking agent and a catalyst in a weight ratio of 10: 1. The finishing paint material provided by the invention has excellent temperature resistance, excellent adhesive force and matte effect, meets the concealment requirement of weaponry, and is simple in preparation method, convenient to construct and good in repeatability; a mixture of fumed s