Addition-curable liquid silicone rubber composition

An addition-curable liquid silicone rubber composition comprising the following components (A) to (D):

• (A) 100 parts by weight of an alkenyl-containing organopolysiloxane having at least two silicon-bonded alkenyl groups per molecule and an average degree of polymerization of up to 1,500, the organopolysiloxane being liquid at 25° C.,
• (B) an organohydrogenpolysiloxane consisting of the following components (B-1) to (B-3):
• (B-1) an organohydrogenpolysiloxane containing at least 6 silicon-bonded hydrogen atoms per molecule and free of an aromatic group,
• (B-2) an organohydrogenpolysiloxane containing 3 to 5 silicon-bonded hydrogen atoms per molecule and free of an aromatic group, and
• (B-3) an organohydrogenpolysiloxane containing 1 or 2 silicon-bonded hydrogen atoms per molecule and free of an aromatic group,
• the moles of Si—H groups in the respective components relative to the total moles (total Si—H groups) of silicon-bonded hydrogen atoms (Si—H groups) in components (B-1), (B-2) and (B-3) are such that [Si—H groups in (B-1)]]/[total Si—H groups] is 50 mol % to 80 mol %, [Si—H groups in (B-2)]]/[total Si—H groups] is 5 mol % to 40 mol %, and [Si—H groups in (B-3)]]/[total Si—H groups] is 5 mol % to 40 mol %, and a ratio of the moles of total Si—H groups to the total moles of alkenyl groups in the composition (total alkenyl groups) is such that [total Si—H groups]/[total alkenyl groups] is 1/1 to 3/1,
• (C) fumed silica having a BET specific surface area of at least 130 m2/g, in an amount of 5 to 60 parts by weight per 100 parts by weight of components (A) and (B) combined, and
• (D) an addition reaction catalyst in an amount of 0.5 to 1,000 ppm of platinum group metal based on the total weight of components (A) and (B).