we have different liquid resin or polymer.like PEG with MW 400,1000,... and Epoxy resin and polyester resin and etc.
you must to know which characteristic do you need.and then chose the best one.if you cant find the best you can modification it by copolymerization,additives,Alloy and...
You may want to check the following somewhat related RG discussions: https://www.researchgate.net/post/Where_are_the_melting_points_and_viscosities_of_waxes_tabulated2 https://www.researchgate.net/post/Would_anyone_please_give_me_the_link_to_papers_from_which_I_can_extract_viscosity_vs_temperature_data_of_paraffin_wax