Are Silicone Sponges Eco-Friendly? 11 Important Facts You Should Know

Are Silicone Sponges Eco-Friendly? 11 Important Facts You Should Know

last updated on June 18th, 2022

Silicone sponges have become quite popular, replacing traditional sponges since silicone versions can be used indefinitely.

They come in various shapes and sizes, and in addition to using them in the kitchen, they are also commonly used in the bathroom for cleaning surfaces or for cleaning yourself.

But although the idea behind these sponges is that they are better for the environment than traditional sponges due to being reusable, are they really eco-friendly?

Overall, silicone sponges are not eco-friendly, especially when you consider how they are made and disposed of. However, there are a few aspects of them that are eco-friendly.

In this article, we’ll look at how eco-friendly silicone sponges are, including whether they are a suitable alternative to traditional sponges and whether or not there are better eco-friendly alternatives out there.

1. Are Silicone Sponges Eco-Friendly?

Before we determine whether or not silicone sponges are eco-friendly, it’s important to look at what silicone actually is and what it is made of.

Silicone is derived from sand, and to make it, quartz sand is heated at temperatures of up to 1800℃ (3272℉).

Doing this draws the silicon out of the sand, and it is then allowed to cool before being ground into a powder.

As you can imagine, heating sand at these temperatures requires a lot of energy, which is supplied by burning fossil fuels

Fossil fuels are non-renewable resources and burning them contributes to air pollution through greenhouse gas emissions.

The silicon powder is then combined with a chemical called methyl chloride and heated again, which causes a chemical reaction that creates the main component of silicone, dimethylchlorosilane. 

Afterward, the dimethylchlorosilane is distilled by heating it at a series of various temperatures, again requiring more energy use. 

After distillation, water is added which causes the dimethylchlorosilane into two substances known as disilanol and hydrochloric acid, then those two substances react to form polydimethylsiloxane. 

The polydimethylsiloxane is then combined with other chemicals in a process known as polymerization to form the silicone itself, then molded into silicone sponges or various other silicone products.

The process of making silicone sponges themselves is not very eco-friendly due to the amount of energy and the number of chemicals that are used. 

We’ve already mentioned that burning fossil fuels to supply that energy creates air pollution, but using chemicals to create silicone can contribute to water and soil pollution as well due to chemical runoff.

Even though the process of making silicone sponges is not very eco-friendly, there are other aspects of silicone sponges that are when we look at the larger picture rather than just how they are made, but we’ll look at each one of these separately.

2. Are Silicone Sponges Biodegradable?

Silicone sponges are not biodegradable. That’s because even though the silicone material is derived from sand, the silicone itself as well as the products made from it are man-made, synthetic materials.

They are made with heavy chemical use and don’t break down in a way that allows them to return completely to their environment. 

Silicone is a non-reactive and stable material, and it’s also resistant to extreme temperatures so it can’t be broken down by weather, bacteria, or other environmental elements.

It’s due to these reasons that silicone makes an effective material to use for sponges.

But unfortunately, it also means that no matter how long they are left in the environment, silicone sponges are never going to return completely back to the environment.

Being non-biodegradable is also not eco-friendly, which is another downside to silicone sponges.

3. Are Silicone Sponges Compostable?

Since silicone sponges are not biodegradable, they are not compostable either. 

Even if they were, though, you wouldn’t want to compost them since they are made with so many chemicals that could leach into your compost and contaminate it.

4. Are Silicone Sponges Recyclable?

One eco-friendly aspect of silicone sponges is that silicone can be recycled. 

The problem with this from the standpoint of an eco-conscious consumer is that silicone is not accepted as a recyclable material everywhere and usually has to be taken to a specialized facility in order to be recycled properly.

With that being said, silicone may not be accepted at your local recycling facility, but many silicone manufacturers often send leftover silicone off to be recycled and may offer programs that allow you to send in your silicone products for recycling as well.

However, even though silicone can be recycled, it can only be recycled so many times before it loses its quality in a way that it can no longer be recycled.

5. Are Silicone Sponges Sustainable?

Silicone sponges are sustainable in the sense that they can be reused indefinitely, which is why they are considered by many to be eco-friendly.

But considering how the sponges are made and that there are limited ways to dispose of them makes them not as eco-friendly as they should be.

The fact that silicone is derived from sand also leads many to assume that the sponges must be sustainable. But sand is actually considered to be a non-renewable resource.

Sand can take thousands or millions of years to form since it is formed by rocks eroding and weathering over time.

Plus, sand that is used for industrial processes such as making silicone is collected by mining, a process that contributes to habitat destruction, erosion, and lowering of the water table, as well as pollution through emissions by the machinery used and transport of the sand.

Considering the amount of sand that is mined versus how long it takes for new sand to form, you can see that making silicone is not sustainable without more regulations being placed on mining the sand used to make it.

6. Are Silicone Sponges Durable?

We already mentioned that silicone is a stable material with high resistance to extreme temperatures, so it doesn’t break apart easily the way that other sponges do.

So yes, silicone sponges are very durable which is why they are able to be reused for such a long time. 

In fact, even though silicone is similar to plastic in the way it is made, silicone sponges won’t shed microplastics over time either.

7. Are Silicone Sponges Washable?

Silicone sponges are washable. Since they have a resistance to high temperatures, they can even be tossed in the dishwasher to be cleaned and disinfected without breaking down.

This is another reason why silicone sponges are able to be reused for such a long time, which makes them eco-friendly and sustainable in that sense.

8. Are Silicone Sponges Toxic?

Since silicone sponges are made from solid silicone, they aren’t thought to be toxic since silicone is a stable material that is non-reactive and won’t break down easily.

Silicone also isn’t thought to be toxic to aquatic organisms either since it doesn’t break down and doesn’t shed microplastics.

9. Do Silicone Sponges Harbor Bacteria?

Silicone is a non-porous material, so silicone sponges don’t harbor bacteria the way that other sponges do. 

Since bacteria can’t get inside the silicone, the sponges don’t provide a hospitable place for bacteria or germs to live.

Any bacteria than does get onto the sponge can be washed away easily with just soap and water, especially since the sponges can be washed in the dishwasher as well.

The sponges are also easy to disinfect without holding any disinfectant chemicals inside them.

10. Are Silicone Sponges Better Than Regular Sponges?

From an eco-friendly standpoint, silicone sponges are not better than regular sponges.

Regular sponges are most often made from natural, renewable materials, with the exception of sponges that are made from plastic.

But regular sponges aren’t as durable or as easy to clean and they can harbor bacteria so they have to be disposed of more frequently.

From a longevity standpoint, silicone sponges are better than regular sponges since they are more durable, and washable, and they don’t harbor bacteria. You can use them indefinitely provided that you take care of them.

Overall, which one is better depends on if you’re looking for an overall more eco-friendly product or a  more durable product that you don’t have to replace as often.

11. How to Dispose of Silicone Sponges

Since they are washable and reusable, you shouldn’t really have to get rid of them unless they are broken.

If they are broken and you can find somewhere locally that accepts silicone as a recyclable material, then that’s the best way to dispose of silicone sponges.

If you don’t have somewhere locally that recycles them, your only other option is to throw them away.

They will go to a landfill and won’t decompose, so this is the least most eco-friendly option.

That’s why you should try to get as much use out of silicone sponges as you possibly can.

3 Eco-Friendly Alternatives to Silicone Sponges

Other than being durable and reusable, silicone sponges are not eco-friendly as far as how they are made and how they can be disposed of.

Here are some better eco-friendly options, but note that you won’t get the same durability and you will have to replace them more often.

1. Natural Sponges 

Natural sponges are made from sea sponges, and they are made from a renewable resource and are biodegradable.

These sponges can be pricey and will have to be replaced every couple of months, but they are a much more eco-friendly option than silicone sponges.

2. Natural Loofahs

Natural loofahs are another alternative to silicone sponges. Natural loofahs come from a plant in the gourd family, so they come from a renewable resource.

Loofahs are also biodegradable and compostable, and are more affordable than natural sea sponges. 

However, they can harbor bacteria and will need to be replaced around once per month.

3. Synthetic Sponges

Even many synthetic sponges are a better alternative to silicone sponges in terms of eco-friendliness, provided that they don’t have a scrubby side.

Most synthetic sponges are made from cellulose and hemp fibers and are biodegradable as well.

However, avoid synthetic sponges with a scrubby side if you want to be more eco-friendly since the scrubby side is usually made from polyester or nylon, both of which are plastics that lower the eco-friendliness.

Even with synthetic sponges, you will have to replace them at least once per month since they can fall apart easily and harbor bacteria growth.

Conclusion

When it comes to silicone sponges, the bottom line is that although they are more durable and don’t have to be replaced nearly as often, they aren’t exactly eco-friendly.

Silicone sponges are derived from sand, a non-renewable resource, and made by using high amounts of energy through heat and various chemicals.

They also aren’t biodegradable and although they are technically recyclable, it is hard for a consumer to do so.

But, they can save money by being washable and reusable and they don’t harbor bacteria so you can make them more eco-friendly by using them for as long as possible.

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