Plastic and Rubber in Satisfactory: The Recycled Loop

Plastic and rubber are the same chain twice over, and both hand you Heavy Oil Residue as a byproduct. The recycled recipes solve that, but their headline numbers are misleading in a way worth explaining properly.

The base recipes

Recipe	Output	Ore per unit	Inputs	Byproduct
Plastic	20/min	1.50	30 Crude Oil	10 Heavy Oil Residue
Rubber	20/min	1.50	30 Crude Oil	20 Heavy Oil Residue

Same crude in, same product out, but rubber emits twice the residue that plastic does. That asymmetry decides how you balance the two, because residue with nowhere to go stalls the refinery entirely — main product included.

The recycled recipes, and why the ore figure misleads

Recipe	Output	Ore per unit	Inputs
Alternate: Recycled Plastic	60/min	3.75	30 Rubber + 30 Fuel
Alternate: Recycled Rubber	60/min	1.50	30 Plastic + 30 Fuel

At a glance Recycled Plastic looks worse than the base recipe — 3.75 ore per unit against 1.50. That number is technically correct and practically misleading.

The reason: our ore figures expand every ingredient through base recipes, so the rubber going into Recycled Plastic is costed as if you made it from crude oil. In a real factory running the loop, that rubber came from Recycled Rubber, which came from plastic, which came from the loop.

The recipes are designed to feed each other, and a figure that costs each one in isolation cannot express that. This is a limitation of the accounting, and we would rather name it than quietly adjust the number.

How the loop actually works

Run both recycled recipes together and they convert Fuel plus a starter quantity of plastic and rubber into a great deal more of both.

The shape:

1. Refine crude into Fuel rather than directly into plastic and rubber.
2. Recycled Rubber consumes plastic and fuel, produces rubber at 60/min.
3. Recycled Plastic consumes rubber and fuel, produces plastic at 60/min.
4. Each feeds the other, with fuel as the real input and a small base-recipe line topping up any shortfall.

Three times the output per machine, and the crude oil goes into fuel rather than into low-rate direct conversion.

The catch is that a loop needs priming and balancing. If either side runs dry the whole thing stops, so a buffer on each product and a Priority Merger favouring loop input over fresh input is worth building from the start.

Residual Plastic and Residual Rubber

Recipe	Output	Inputs
Residual Plastic	20/min	60 Polymer Resin + 20 Water
Residual Rubber	20/min	40 Polymer Resin + 40 Water

These consume Polymer Resin, which is itself a byproduct of certain oil refining recipes. Their ore figures look poor for the same accounting reason as above — resin costed through base recipes is expensive, resin you were going to throw away is free.

If your refinery setup produces resin you need to consume, these turn a disposal problem into product. If it does not, they are not worth chasing.

Balancing the two

Because rubber makes twice the residue, a factory producing both at equal rates generates unequal disposal load. Two practical patterns:

Run more plastic than rubber if you want less residue to manage. Most factories need more plastic anyway.

Use the recycled pair as a pressure valve. Surplus of one converts into the other, which means an imbalance stops being a problem and becomes an input.

Where they actually go

Worth knowing the demand shape, because it is heavier than it looks.

Plastic feeds circuit boards, computers, Coated Iron Plate, and most of the electronics chain. If your computer line will not scale, the constraint is frequently plastic rather than anything electronic.

Rubber feeds Rigor Motor’s chain, several frames, and the molded steel alternates.

Both are consumed continuously rather than in bursts, which means a line running into storage is the right shape rather than one you switch on when needed.

Sizing an oil section around them

Work from the crude, because that is the constraint.

An Oil Extractor on a normal node gives 120 crude per minute. At the base recipes, each refinery consumes 30, so that node supports four refineries producing 80 plastic or rubber per minute — and emitting between 40 and 80 residue per minute depending on the mix.

That residue figure is the one to plan around. Converting it to Fuel and burning it in Fuel-Powered Generators is the standard answer, and it means your plastic line comes with a power plant attached whether you wanted one or not.

With the recycled loop, the same crude goes into Fuel instead, and the plastic and rubber come out at 60/min per Blender rather than 20/min per Refinery. The crude requirement per unit of product drops substantially, which is the practical benefit the ore column cannot express.

Getting the loop started

A loop that feeds itself still needs something to start with, and this trips people.

Build the base recipes first. A small direct plastic and rubber line gives you the starter stock and continues to top up any imbalance later. Do not dismantle it when the loop comes online.

Prime both buffers before switching over. A few hundred of each product in storage means the loop can absorb a hiccup without stalling.

Use Priority Mergers with loop input on the priority side. Otherwise fresh input and recycled input compete, and the loop is the one that starves.

That third point is the same pattern as the aluminium water loop, and for the same reason: whenever a chain feeds itself, the returned material needs priority over fresh supply, or the return path backs up while the front end keeps pushing.

Common mistakes

Leaving the residue output unconnected. The refinery stops completely, main product included.

Treating plastic and rubber as symmetrical. Rubber emits twice the residue.

Reading the recycled recipes’ ore figures as a verdict. They are costed in isolation; the loop is what makes them good.

Building the loop without buffers. If either side runs dry the whole thing stalls.

Chasing Residual Plastic without a resin surplus. It is a disposal solution, not a production upgrade.