Polymer Bundles are one of the resources that players will need to craft different items in Warframe. They are a component that can be found on various planets in the game and they will also drop out from defeated enemies.
The best place to farm Polymer Bundles in Warframe is on Uranus, as it offers a high amount of resources and is quite easy to farm with a proper farming Warframe. However, there are some exceptions that are worth mentioning.
The first place to farm Polymer Bundle in Warframe is during the Dark Sector Defense Mission named Romula, where the enemies are levels 8 to 18. These enemies are pretty easy to defeat and will make it easier for you to get your hands on Polymer Bundle.
Another good location to farm this resource is during the Survival Mission on Uranus called Assur, where you will face enemies that are levels 25 to 35 from the Grineer Galleon tile set. This Dark Sector Survival mission has a bonus 25% drop rate that can really help you in your farming endeavors.
In the end, it’s up to you to decide where you want to farm Polymer Bundle and which resources you need for your next build. Regardless of where you choose to do it, though, it is important to remember that it can take months before you have the amount of polymer bundles that you need.