This is a Wall to Corner Exterior Grade Expansion Joint Cover, featuring a Santoprene gasket design that allows for fluid seismic movement during joint expansion and contraction. Seal barbs provide secure engagement in the frame, making installation easier, while the Centering Bar System for extra wide joints eliminates any need for an expensive pantograph. Optional silicon seals and extra long seals are available, for continuous & weather tight installation. Optional fire barrier is available.