Economy Block Liner with Bottom Seams — Pack of 100

Our precision-made block liners feature all seams on the bottom for excellent performance! Unlike handmade liners that often leak, our machine-made liners are built consistently with high-quality seams. With proper use, they provide superior leak prevention.

Be sure to watch our brief installation video here for simple instructions that will help you avoid installation errors that can cause leaks.

Ideal for industry-standard block makers, including the CB300.

Use one per block. Available in packs of 100 at the best price in the industry!