Can Poly-Flex liners of different thickness or textures be welded to each other?
Yes. Poly-Flex liners with thickness or texture differences of 20 mils or less can be fusion welded together. Liners with thickness or texture differences of greater than 20 mils should be extrusion welded together. • Can Poly-Flex liners of different densities be welded to each other? Yes. Welding temperature adjustments must be made to achieve a successful weld. When extrusion welding, the lower density welding rod should be used. • Can Poly-Flex seams be tested for leaks? How? Yes. Poly-Flex seams are non-destructively tested over 100% of the seam length for leaks. The most common method is the air pressure test for dual wedge seams. The vacuum box test is used for extrusion welds. • Can Poly-Flex liners be installed directly on top of concrete slabs or asphalt pavement? Yes. Concrete and asphalt slabs must be smooth and have no sharp edges. • Can Poly-Flex liners be attached to fixed structures such as concrete, steel, pipes, etc? How? Yes. Poly-Flex liners can be attached to fixed
