Silicone rubber composition, crosslinked silicone rubber, and sealing material

Provided is a silicone rubber composition having excellent reproducibility of curing characteristics, while ensuring material filling time and improving productivity due to short-time curing. The silicone rubber composition contains (a) an organopolysiloxane having an alkenyl group, (b) a peroxide crosslinking agent, and (c) a heat stabilizer, wherein the (c) contains a compound represented by general formula (1). In formula (1), R1 represents hydrogen or a methyl group, R2, R3, R4, and R5 each independently represent a C1-9 alkyl group, and R6 represents hydrogen or a methyl group. 提供兼顾材料填充时间的确保和基于短时间固化的生产性的提高、并且固化特性的再现性优异的硅橡胶组合物。硅橡胶组合物含有(a)具有烯基的有机聚硅氧烷、(b)过氧化物交联剂、(c)热稳定剂，所述(c)包含下述通式(1)所示的化合物。在式(1)中，R1表示氢或甲基，R2、R3、R4、R5分别独立地表示碳原子数为1～9的烷基，R6表示氢或甲基。