The Self-leveling pu sealant for concrete road joint sealing, the product is quite mature and supply to many countries already.
Now we have two typical models JSL-90 and JSL-100, Price range is $2.3-$2.84/kg

Advantages

One component, easy to application, free solvent, non-toxic odorless after curing, environment-friendly

Self-leveling, excellent flowability, easy to scratch sewing operation

High displacement, no crack, fall off, suitable for sealing kinds of concrete road

The new and used sealant  has good compatibility, easy to repair

800+ Elongation, Super-bonding without Crack Excellent water resistant, oil resistant, acid and alkali resistant, resistance to puncture 

Applications

Bonding  and  sealing  for  the  gap  of  joints of  road,  airport  runway,  square,  wall pipe, wharf, roof, underground garage and basement

Sealing for leakage of oil refinery and chemical plant

Bonding  and  sealing  for  industrial  floor,  such  as  epoxy  floor  and  all  kinds  of paint surface.

Excellent bonding, sealing  and repairing of  various kinds of materials, such as concrete building, wood, metal, PVC, ceramics, carbon fiber, glass, etc