How to dispose of resin – how to throw away resin safely

How to dispose of resin

Can I throw resin into the trash?

From time to time, I take an inventory of what resin supplies I have and determine if they are still something I can use of it they are past their useful life.  If you are thinking about the same thing, please read these tips to make sure you know how to dispose of resin safely and responsibly.

1.  NEVER pour chemicals down your drain or toilet.

You may cause damage to your pipes or stop up your system.  Many resin supplies can also be marine pollutants, so you are harming aquatic life when you do this.

2.  If you have liquid resin components that you don’t want any longer, the safest option is to take your local waste collection center as ‘hazardous materials’ waste.

These centers (at least in the U.S.) generally also collect paint, batteries, electronics, etc. to keep them out of landfills.  You can also review the safety data sheet (SDS) information for your products.  There will be recommendations and cautions on how the product can be disposed of.  Be sure to keep labeling on the containers and put them in a package that allows waste collection personnel to handle the items safely.  (e.g.  Don’t hand them a bottle with sticky resin on the outside.  Put it in a plastic bag first.)

3.  If you have resin containers that are empty, be sure they are capped tight before throwing the containers in the trash.

Once I have used all the contents on resin and hardener kits, I will finish by putting one cap on the other bottle.  This will cure them shut!  Alternatively, if you have a small amount of resin and hardener in each, you can pour one bottle into the other, allow to cure, then throw away with your regular trash.

4.  Cured resin is considered inert and can be disposed of in regular trash.

Yes, you can throw your resin mistakes away.  Otherwise, here are some ideas on what to do with your resin mistakes.

5.  If you are working with mixed resin and find you don’t need all of it, allow it to cure before throwing it into the trash.

Otherwise, you can have some resin experiments ready to go for times like these.  Here is some resin experiment inspiration.


If you ever have questions about how to dispose of your resin products, please contact the manufacturer.


Unpublished Blog Posts of Resin Obsession, LLC © 2020 Resin Obsession, LLC

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23 thoughts on “How to dispose of resin – how to throw away resin safely

  1. Are you able to recycle finished resin products? I have a few mistake pieces, but I wold hate throwing them away. I like to recycle as much as possible, but I cant find any information on it.

    1. Yes! You can incorporate them into new resin projects. Unfortunately, there is no way to remelt the resin to reuse it.

  2. I am wondering if there is a known recycle code for resins in general (or a product specific one…) as in, is it a #7 which means that recycling centres in Australia cannot recycle it in their usual way and won’t accept it…? Thanks 🙂

    1. Are you talking about the containers or the resin itself? Even if I get the containers empty, I don’t try to recycle them.

  3. Great post Katherine! It’s so important to understand to correct means of disposal. And I love your idea about reversing the lids on empty bottles…brilliant !! Nothing makes me happier than a resin artist that is both knowledgeable and responsible. You are at the top of the list ♥

    1. Thanks so much Jane. I do wish all resin artists would take disposal methods seriously. We only get one Mother Earth!

  4. I’m an idiot and have poured quarter litre resin with hardener down my kitchen sink. Don’t know if it’s right but I added half bottle detergent then a kettle of hot water. HELP!!!!!!!!!

    1. Hi Kerry, unfortunately, you have likely damaged your plumbing by doing this. You need to call a plumber next. 🙁

      1. After I was done pouring resin and my daughter took the mixing cups and washed them in the sink. I scraped out as the resin but there was a little left over. By the time I realized what she was doing it was too late and she was done. Nothing was poured down the drain. She just washed the cups and it had a little resin left in there . What can I do? Will it mess up my sink?

  5. Hi! I’ve used all my resin, but I have leftover hardener. How do I dispose the hardener? I’ve looked everywhere to find the answer but couldn’t find any.
    Thank you in advance!

  6. Hi ketherine,which resin should I use for casting purpose.I want to use in acrylic plastic bangles carving surface up to 1/8″ deep with hard curing in 2 hours. What will b the perfect ratio of resin and hardner for curing in that time.please give exact no. Or grade according to my requirements.
    Thanking you and regards.

  7. My resin never cured in the mold. Is it a waste? Can I scoop it out and maybe add more hardener? Mix it better? Something?

  8. New to resin art and made sure to get no VOCs etc and mixed a very small amount (about 1/2 cup). I’m letting the resin cure in the bottom of a small wood box but have leftovers and paper towel with some on it. I threw the paper towel in the trash (just drips got on the paper towel), and have about half left in the plastic mixing container. Should I just let that cure and then throw it all away (container too)? Also how safe should I be fumes-wise with mixing very small amounts like that? I did it in my kitchen and have the box curing in the kitchen.

    1. Hi Jay, I’m glad to hear you are taking resin safety seriously! Once the resin is cured, you can safely throw it away in your household trash. In general, mixing small amounts of resin in your home should not produce a large amount of fumes. The best way to know about this though is to review the resin Safety Data Sheet (SDS) which gives specific recommendations on ventilation requirements.

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