For instance, the powder or powder blend may include {HEAD ~ a water swellable powder} for blocking {TAIL ~ the migration} of water along the assembly for effectively blocking the migration of water 
for blocking
For instance , the powder or powder blend may include { HEAD ~ a water swellable powder } for blocking { TAIL ~ the migration } of water along the assembly for effectively blocking the migration of water
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH