What to know
- The Xfill Resin Salvage contract requires you to extract with Drone Resin.
- Bio Research on Dire Marsh offers one of the fastest resin farming routes.
- Higher rarity resin counts for more progress per extraction.
- You must successfully exfil with the resin for it to register.
Marathon’s Xfill Resin Salvage contract is straightforward once you understand where to look and how progress is calculated. If you focus your run around Bio Research on the Dire Marsh map, you can complete this contract in just a few minutes with minimal risk.
Below is a quick overview before diving into the full route and optimization tips.
| Category | Details |
|---|---|
| Contract Name | Xfill Resin Salvage |
| Required Item | Drone Resin (Biomata Resin) |
| Recommended Map | Dire Marsh |
| Best Location | Bio Research Facility |
| Progress Boost | Higher rarity resin |
| Completion Method | Successfully exfil with resin |
Location of finding Resins in Dire Marsh map
Bio Research sits close to common spawn points on Dire Marsh, which makes it ideal for quick contract farming. When you drop in, you can usually reach the facility within seconds. The interior layout contains multiple containers, tool carts, and lab storage units where Drone Resin frequently spawns.
Because this contract tracks extraction rather than simple pickup, your priority isn’t combat. It’s speed, awareness, and clean exfiltration. You want to minimize unnecessary fights and focus on securing resin quickly.

Higher rarity Drone Resin significantly increases progress. If your contract specifies higher-rarity salvage, prioritize uncommon or rare variants when you find them. These count for more progress per run and can dramatically reduce the number of required extractions.
How to complete the Xfill Resin Salvage contract step by step
Step 1
Spawn into Dire Marsh and immediately orient yourself toward Bio Research. If you spawn nearby, sprint directly there before other squads rotate in.

Step 2
Enter the Bio Research building and begin checking storage containers, stacked crates, lab tables, and tool carts. Drone Resin typically appears as a compact orange-and-white canister labeled clearly in your HUD.

Step 3
Prioritize higher rarity resin if available. If you see multiple pieces, grab the rarest first. Your contract progress scales based on item rarity, so this can reduce the total runs needed.

Step 4
Once you’ve secured enough resin to meet your backpack capacity or contract target for the run, disengage from unnecessary fights. Your objective is extraction, not elimination.

Step 5
Move toward the nearest available exfil point. Stay alert for ambushes, especially near extraction zones, as other players may be farming the same contract.

Step 6
Successfully extract with the resin in your inventory. Progress only counts if you exfil alive with the item.

Where to look inside Bio Research
Inside Bio Research, resin most commonly spawns in compact storage areas, stacked white containers, and research carts. You should sweep the facility in a tight loop rather than wandering randomly. Start near the entrance, clear each room methodically, and exit quickly once you’ve secured enough salvage.
Because the building is close to spawn routes, early entry gives you the best chance to loot uncontested. If you arrive late, expect resistance from players farming contracts or pushing toward mid-map objectives.

How rarity affects contract progress
Not all Drone Resin is equal. The contract tracks salvage value, meaning higher rarity resin contributes more progress than common variants. If your objective specifies higher rarity salvage, lower-tier items may not count or may count minimally.
If you’re short on time, focus entirely on rare finds and reset the run if you don’t find enough valuable resin quickly. Efficient farming is often faster than fighting for marginal gains.
Contract rewards
While rewards may vary depending on faction alignment and contract tier, Xfill Resin Salvage typically provides faction progress, reputation, and currency upon completion.
| Reward Type | Description |
|---|---|
| Faction Reputation | Progress toward faction upgrades |
| Currency | Used for gear and loadout purchases |
| Contract Completion Credit | Counts toward seasonal progression |

Tips to finish the contract in under a minute
The Xfill Resin Salvage contract in Marathon is one of the most efficient tasks to complete when you plan your route properly. By prioritizing Bio Research on Dire Marsh, focusing on higher rarity Drone Resin, and extracting quickly, you can finish it in just a few clean runs.
Speed is everything for this contract. If you spawn near Bio Research, you can enter, loot, and exit in under a minute. Ignore unnecessary rooms once you’ve found enough resin. Avoid prolonged firefights. If another squad is already inside, it’s often faster to disengage and reset rather than contest the building.
Running a lightweight loadout with high mobility can help you clear faster and escape more reliably. The faster you move, the lower your exposure to third-party engagements.
If you approach it methodically and avoid unnecessary combat, you’ll complete the objective faster than most players expect.