<p>Methods and apparatuses for sealing a wellbore are provided. A seal assembly carried by a pair of opposing ram blocks of a blowout preventer is provided. The seal assembly includes a pair of seals carried by the pair of opposing ram blocks and a plurality of inserts carried by the pair of seals. The inserts include an upper body and a lower body with a rib therebetween. The upper and lower bodies each have an extended tip on a seal end thereof and a tip receptacle on a leading face thereof for receiving the extended tip. The extended tips are positionable in the tip receptacle of an adjacent inserts whereby an extrusion of a seal therebetween is restricted.</p>
