A solventless silicone pressure-sensitive adhesive composition is
provided. The composition includes (A) a polyorganosiloxane with a
polymerization degree of 300 to 2,000 and having at least two alkenyl
group-containing organic groups, (B) a polyorganohydrosiloxane having at
least three silicon-bonded hydrogen atoms, (C) a polydiorganosiloxane
having alkenyl groups at both terminals, (D) a polydiorganosiloxane
having SiH groups at both terminals, (E) a polyorganosiloxane composed of
R.sup.2.sub.3SiO.sub.1/2 units and SiO.sub.2 units (R.sup.2 is a
monovalent hydrocarbon group), and (F) a platinum-based catalyst. The
composition enables the prevention of problems caused by residual or
volatilized organic substances, such as the absorption of ultraviolet
radiation or the like, and also enables ready removal of the composition
without deforming or damaging the adherend.