Streamer filler material and process

A method of forming a geophysical streamer, comprising:

• forming a first unreactive mixture of a two-part polymerization reaction, wherein the first unreactive mixture comprises an A component of a two-part silicone gel;
• forming a second unreactive mixture of the two-part polymerization reaction, wherein the second unreactive mixture comprises a B component of the two-part silicone gel;
• adding the first unreactive mixture to a paraffin oil system;
• adding the second unreactive mixture to the paraffin oil system to form a reaction mixture;
• curing the reaction mixture to form a streamer filler material;
• and
• after the curing, disposing the streamer filler material in a streamer casing of the geophysical streamer by heating and pumping the streamer filler material or by reactive extrusion of the reaction mixture into the streamer casing wherein the reactive extrusion cures the reaction mixture;
• and
• wherein the formed geophysical streamer is configured for marine geophysical surveying.