PEL-PLUG Bentonite Pellets is a high swelling, sodium bentonite compressed into pellet form. Available in 1/4 , 3/8 and 1/2 sizes. Forms a high density seal between the sand pack and grout section of monitoring wells. Can be tremmied into place or placed through a hollow stem auger. Non-Coated Bentonite Pellets High swelling, sodium bentonite compressed into pellet form• Available in 1/4”, 3/8” and 1/2” sizes• Forms a high density seal between the sand pack and grout section of monitoring wells• Can be tremmied into place or placed through a hollow stem auger