Additives are always added into silicone rubber to improve properties. As a sealant, it is well known that the adhesion property is a key aspect of the sealant system. The effect of additives on the adhesion properties of silicone rubber sealant are discussed in this study. The results showed that the adhesive properties of samples with single coupling agent are lower than that with multiple coupling agents. The adhesive properties of sample first increase with increasing amount of coupling agent and then decrease linearly. The adhesion strength of SR sealant decreased with the amount of the plasticizer and filler added into the silicone rubber has little influence on the adhesion strength of silicone rubber.