Coolants have seen quite a revolution in the automotive industry. The sector has come a long way from standard air cooling to liquid-led cooling. In the 1950s, when automotive components started using PFAS, or per- and polyfluoroalkyl substances, cooling systems became even more potent.

The primary advantage of PFAS comes from the high-temperature resistance of these chemicals. They made cooling more powerful and efficient, extending the life of the engine and batteries.

As of 2025, the situation has sprung up with troubling aspects. Many coolants contain these “forever” chemicals, which bear deep-seated repercussions on the environment. They also have connections to serious health concerns, from cancer to reduced immunity.

Now that the automotive sector has recognized this situation, ongoing discussions in relevant industry circles center on eco-friendly alternatives to conventional coolants. What does this mean for car owners?

PFAS in Automotive Cooling Systems 

These chemicals help automotive components withstand adverse conditions and last longer under duress. So, along with improving cooling efficiency, PFAS can extend the lifespan of various parts, such as radiators and water pipes. Moreover, automotive parts comprising PFAS offer better corrosion resistance and electrical insulation.

The problem is that PFAS can have nasty health and environmental impacts when they accumulate over time. Take the example of AFFF, an aqueous firefighting foam used to put out liquid fires. It infamously contains PFAS and is responsible for subjecting many firefighters to bladder and liver cancer. In fact, AFFF lawsuits and their plaintiffs’ plights are a vivid example of the potential damage PFAS can cause.

Their environmental impact is equally distressing. The US FDA notes that the persistent nature of these chemicals (bioaccumulation) has contaminated the air, soil, and water in many regions.

According to TruLaw, individuals must be proactive in making manufacturers accountable for the possible side effects of PFAS-containing products. It includes companies that manufacture coolants and other heat management components in vehicles. 

What Are the Alternatives to PFAS-Based Coolants?

Besides the automotive sector, other fields like data centers and refrigeration are also worried about the business impact of phasing out PFAS. In late 2023, the European Chemicals Agency proposed a ban or large-scale restriction on PFAS production. If such proposals go through, companies will feel compelled to seek replacements and prepare for a change in business as usual.

Ongoing research has found a few possible alternatives to phase out PFAS from automotive components. However, there are apprehensions about their safety in high-temperature conditions. 

Synthetic heat transfer fluids have emerged as a possible substitute in the electrical and semiconductor industries. These coolants use silicone oils (polydimethylsiloxanes). The idea is to keep them free of not only PFAS but also of fluorinated hydrocarbons.

An MDPI report suggests that short-chain PFAS can be good alternatives for their long-chain counterparts as their bioaccumulation is lower. Moreover, their risk of acute toxicity is also less. The paper also discusses telomer-based fluoropolymer as a possible replacement. The focus is on finding biodegradable options manufactured from non-perishable resources.

Some automotive experts recommend immersive battery cooling as a safe approach for managing battery thermal runaway. It can also offer quick charging and a longer lifespan.

When Will PFAS Alternatives in Automotives Become Viable?

At present, we know the gravity of the damage PFAS can cause to our health and the environment. However, substituting them in the automotive sector is long-drawn and complicated. 

Chemistry World observes that PFAS are ubiquitous in the global automotive supply chain. Besides coolants, they prevail in engines and fuel components. Their replacement must meet safety and durability standards to become commercially viable.

However, since the movement to ban these chemicals has picked up gusto worldwide, we can expect more momentum in the coming years. Car connoisseurs can anticipate substantial developments in this area, from alternative coolants to greener electronic components.

How Can You Limit PFAS Exposure as an Automotive Enthusiast?

In the meantime, one can opt for automotive products with lower or zero PFAS levels. Alternate coolants may not be feasible yet, but you can avoid using waxes and sealants that contain these chemicals. 

Some car washers also use tire shines with PFAS. The advantage for service providers is that PFAS helps create a barrier that makes dirt and grime easier to remove from the vehicle. However, the current context demands that we ask if this solution is indispensable.

Similarly, we recommend checking the stain-resistant coating on car seats. Even dashboards and other interior areas may use these chemicals for heat resistance. Some companies have come forward with PFAS-free options for vehicular coatings. They are worth exploring the next time you service or upgrade your vehicle.

As the world advances toward heightened environmental and health awareness, a lot will change in the automotive sector. As responsible car owners, we cannot afford to be dismissive about the chaos caused by the excessive use of PFAS. Let’s hope alternate solutions pick up steam and become more readily available.