SlabGasket XL Expansion Joint Replacement - 1 3/8" Width (Gray) SlabGasket is designed to easily replace rotten wood expansion joints Color: Gray Order by the foot, QUANTITY = FEET. Order only what you need! SlabGasket is available in 11 widths, two colors, and two heights Installation can be as easy as scratching out the rotten wood and stepping in SlabGasket