Optimization of polymer and the other components of the Advanced-SiMP sealant has been carried out to enhance performance of current lab prototype. The characteristics of this product meet the target performance: tensile resistance comparable to a Polyurethane (PU) sealant plus exceptional resistance to demanding service conditions and through severe ageing test (resistance of adhesion on several substrates at high temperature and/or high relative humidity). In addition to tensile resistance, shear strength, hardness, impact resistance and rheology and applicative properties had been tuned.