PYM II Polymer Clay Spray Sealer

NOTE: PYM II is no longer being manufactured and I know of no sources anywhere in the world. I’m leaving this article up for archive purposes. 

What polymer clay spray sealer is available? It’s a question we often see asked on polymer clay forums and groups. Polymer clay itself is durable and waterproof and does not need a varnish or sealer. But if you have added a surface embellishment such as mica powder or chalk pastels, or used a technique such as crackled metal leaf, you will need to seal the surface to make sure that your special treatments don’t become damaged by the elements.

Liquid sealers such as Varathane or acrylic varnish are commonly used to seal polymer clay. But in some cases these varnishes don’t give satisfactory results. Mica powders can be rubbed off or smeared by the addition of varnish. And designs made with alcohol inks on the surface of baked polymer clay will run and bleed when painted over with liquid sealers.

Another problem occurs when you need to seal a highly textured surface. Sometimes liquid sealers will puddle in the texture and that can look gloppy and ugly. Wouldn’t it be great to have a spray varnish? But you’ve probably heard the warnings: Don’t use spray paints and sealers with polymer clay! And that warning is almost always correct. But there is at least one product on the market that is a spray sealer specially designed to be safe for polymer clay. It’s called PYM II. Note: Helmar Crystal Kote is another one.

PYM II is now available at Happy Things in the Netherlands, shipping to all of the EU.

Characteristics of PYM II Polymer Clay Spray Sealer

Okay, that’s an odd name, right?

It stands for Preserve Your Memories and I’m guessing it’s a second version they made (though there is no PYM I). It’s marketed as a spray sealant or coating that is used to preserve, seal, and protect things that hold memories for you such as photographs, newspaper clippings, children’s artwork, and even things like autographs. It’s also used as a fixative to keep glitter, charcoal, pastels, and mica powders from rubbing off or smearing.

PYM II comes in a 12 ounce aerosol can and a 6 ounce finger pump spray can. According to the company’s website, PYM II is water resistant, has UV blocking ability, is non-yellowing, is acid-free, and is compatible with many materials including polymer clay. Yes, you read that right. PYM II is a spray sealer that is safe for polymer clay! I’ll show you some results in a bit, but for now here’s my observations of PYM II acrylic sealer spray.

Does it Smell?

Just like any aerosol spray, you really do need to use this spray outdoors. Or at least in your garage. Although it does not have the strong solvent smell that spray paint has, you don’t really want any aerosol spray to be floating around in your house. It does have volatile compounds that aren’t good for you, so ventilation is a must. PYM II does have a fairly mild, but distinct fragrance that’s not a whole lot worse than hair spray. The smell dissipates very quickly and items that you spray with PYM II won’t have a lingering smell beyond a few hours.

How Glossy is it?

PYM II is a not really a gloss sealer spray, but it will give a slight sheen to items that it’s sprayed on. Items that are textured will remain textured. And a light coating of spray on a piece of copy paper, after drying, will look nearly the same as the uncoated paper. Thicker and multiple coats will build up, though, and given enough coats you can get a fairly glossy finish. But this is not a thick lacquer and it’s important to note that the texture of the item you are spraying will remain.

In the picture below, black Premo polymer clay was first baked and then stamped with various colors of Inka Gold (Affiliate Link – learn more here). Then the left half of the sheet was sprayed with two coats of PYM II. As you can see, the sealer makes the color richer and brighter and brings out the sparkle in the Inka Gold (Affiliate Link – learn more here). You can also see that it has a slight sheen. But it’s not truly glossy. Note that you can see the texture of the clay and of the stamped Inka Gold through the sealer.

PYM II polymer clay spray sealer is slightly glossy and works to seal water soluble paints such as Inka Gold.
A sheet of Premo was stamped with Inka Gold and then the left half was sealed with PYM II. Note the richer colors and the slight sheen of the coated side.

If you need a truly matte spray varnish, or one that is invisible on your finished piece, I recommend Helmar Crystal Kote Matte.

How Fast Does it Dry?

The manufacturer states that PYM II dries in about two minutes. I agree with that. I’ve used a lot of spray paint over the years and I expected this to act the same. But it truly dries almost instantly.

In fact, it acts much more like hair spray than spray paint. A light coating dries fast enough that I can spray one side of a piece of paper, flip it over, and spray the other side right away. A heavier coating (where you make it wet) will take longer, but it will be dry before you know it. It’s not worth going back in the house. Just hang out for a couple of minutes and then flip it over. But it does take 24 hours for the sealer to fully cure and harden.

How Durable is it?

It just doesn’t seem that a couple of light coats of a spray would give a durable finish. But it does. It’s flexible and does not crack off. I have some VerDay coated pieces that I sprayed with several fairly heavy coats of PYM II and I have to scratch pretty aggressively to damage the coating with my fingernail. I wouldn’t use it in high stress areas where one component rubs against another, but it will be quite durable in everyday use, even for beads or jewelry components.

Is PYM II Waterproof?

PYM II is water resistant. That means that after sealing with PYM II, you can get things wet but they won’t absorb the water. But this spray is not intended to fully waterproof an item and if submerged long enough I’m sure your item would be damaged by water.

This video by the manufacturer shows how well PYM II waterproofs newspaper. If you coat newspaper with PYM II and then dip it in water, the paper will not absorb water and become soggy. I find this to be amazing.

Tests with PYM II on Polymer Clay

I’m very happy with using Varathane as a finish for most of my polymer clay creations. But there are two instances when Varathane doesn’t work well for me. One is when sealing alcohol inks that are used to decorate the surface of baked polymer clay.  And the other is when I use mica powder on textured surfaces, such as when making these Mica Leaf Pendants.

You can seal mica powders on polymer clay with the spray sealer PYM II.
This polymer clay Mica Leaf Pendant is sealed with PYM II.

Sealing Alcohol Inks on Polymer Clay with PYM II

Alcohol inks are great for coloring unbaked translucent polymer clay. And once baked, the colors are stable. But if you use alcohol ink on the surface of baked clay, the colors can fade. Alcohol inks are soluble in alcohol, so basic cleaning solutions like Windex will cause surface alcohol ink to run and bleed. Hair spray, insect repellent, and even some lotions can cause alcohol inks to run.

If you try to seal your piece with Varathane or acrylic varnish, that can also cause the alcohol inks to run. I have heard that PYM II will work for this. I’ve also heard that you can use PYM II to keep adjacent colors of alcohol ink from running together and getting a dark interface line. So I tried it out.

I baked a sheet of white Premo polymer clay and then used Q-tips to apply a stripe of alcohol ink, starting with the blue at the top. I let each color dry before I used the next color. You can see this on the top half of the clay sheet in the picture. Starting with the red stripe and then going down (the bottom half of the picture), I sprayed the sheet with PYM II between each color of alcohol ink.

You’ll notice that on the top half of the sheet, each color dissolves the previous color and runs into it (which is typical behavior of alcohol ink). But the bottom half of the sheet, which was sprayed with PYM II between each color, does not dissolve the previous color and does not blend together. (Thanks to Boni for the wonderful idea!)

Alcohol Inks stay separated better when sealed between colors with PYM II.
This is a sheet of white Premo striped with alcohol ink. The top half was done without sealing between colors. The bottom half of the sheet was sealed with PYM II between each color, preventing them from mixing.

But you’ll also notice, if you look closely at that top blue stripe, the PYM II spray itself dissolved the alcohol ink a bit. Maybe I wasn’t waiting long enough between coats and the ink hadn’t dried fully. I’m not sure. And also notice that the alcohol inks laid down on top of the PYM II coating didn’t spread out as smoothly. Again, that might be due to it being freshly sprayed. If I’d waited several days between coats, that might have changed things.

I do know that fully cured PYM II is definitely resistant to alcohol, though. In one of their videos, the manufacturer shows writing on coated photograph with a Sharpie and then erasing it with rubbing alcohol. I tried this on a piece that I coated several months ago and it works! On fully cured PYM II, you can write with Sharpie and then erase it with alcohol without damaging the finish!!

Sealing Mica Powders on Polymer Clay with PYM II

Mica powders, such as Pearl-Ex or Perfect Pearls (Affiliate Link – learn more here) are wonderful on the surface of polymer clay. If you use a brush to apply mica powders to raw polymer clay, the mica will adhere to the clay during baking. But if you’re making jewelry, you need to seal it or the excess mica will rub off on you or your clothes. This is true to a certain extent with chalk pastels, too.  PYM II is a great fixative for charcoal and pastel drawings on paper and it’s also a great sealer for mica powders on polymer clay. It makes the colors brighter and more rich as well as fixing them in place.

To test this, I textured a sheet of black Premo polymer clay with a texture sheet and then brushed it with Magenta Pearl-Ex. (Affiliate Link – learn more here) After baking, I blew on it to remove the loose excess powder. I sealed the right side of the sheet with two coats of PYM II. Then I used baby wipes to rub each side to see how much color would come off.

Note that the PYM II did make the colors more rich and actually fixed the surface excess powder to the clay, changing its color slightly.

That’s why the right side is darker. On the left side there is actually quite a bit of loose powder in the recesses of the texture. And notice that you can easily rub off Pearl-Ex (Affiliate Link – learn more here) from the uncoated side, but the side coated with PYM II had very little color rub off. Keep in mind, both sides of this sheet were identical until I sprayed the right side with PYM II. It’s the only difference between the two.

PYM II spray coating works well to stabilize and seal mica powder such as Pearl-Ex on polymer clay.
Textured black Premo was coated with Pearl-Ex and then baked. The right half was sealed with PYM II. Then both sides were scrubbed with a baby wipe. Very little color came off the sealed side.

So yes, PYM II does a fantastic job of sealing mica powders on polymer clay. It especially works well for highly textured surfaces which would be difficult to seal with a liquid varnish or sealer such as Varathane.

Where to Buy PYM II

PYM II’s manufacturer, Doug and Donna Shepherd of Precision Blue, are retiring and the transition to a new owner has been problematic. It is no longer being manufactured.

Alternatives to PYM II

I have been actively seeking more alternatives and have bought and tried about 17 other spray sealers. To date, no other product works the same, and the vast majority of these spray sealers remain sticky on polymer clay. Please do not use Krylon spray varnishes or other hardware store brands. The craft store or hardware guy will tell you it is fine, but it is not.

Also, please be aware that a spray will work well on one clay and not on another, so take recommendation you get from Facebook groups with a grain of salt. You can read about my tests here. I’ve tested even more since writing this article, and I’m still going!

There are many brush-on varnishes that will work. Have a look at the ones I recommend in my Testing Sealers article. If you need to seal mica powders such as Pearl Ex, I do like using Final Coat or Christi Friesen’s Swellegant Sealer (Affiliate Link – learn more here).

How I’ve Used PYM II

  • I used it to seal patinas that I created with VerDay patina paints. You could undoubtedly use it for Swellegant in the same way
  • Sealing Pearl Ex test swatches
  • Sealing chalk pastels on polymer clay
  • Sealing mica powders on scrapbooking mixed media papers
  • Coating ink-jet printed images before covering with resin

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103 thoughts on “PYM II Polymer Clay Spray Sealer”

  1. Hi Ginger, thanks for this, it taught me a lot. I’m wondering if what I need to prevent my polymer clay jewelry (especially white or light coloured ones) from makeup stains. I’ve had this problem recently and I’m currently aggressively for a solution that does not leave a glossy finish like resin. CAC you recommend something or direct me where to find something that will help? Thank you!

    1. I saw your comment on Instagram and answered it there. I’ll repeat it here, for other readers who come along later. “…nothing will prevent the earrings from getting dirty if someone has makeup on their neck. And polymer clay of course can be washed and even scrubbed with a toothbrush. But to make it even easier to clean them, you can make the Surface smooth and fairly shiny. I think a varnish like varathane would be your best bet. Please do not use a spray. Please please do not use a spray.”

  2. Just purchased PYM II on Etsy for $40, I had to think twice about it before I clicked “check out” bc of the price. I hope it’s worth it, and seals pearl ex powder on my clay without compromising the integrity of the finished product.

  3. It seems to me that if PYM II is so popular, and works so well on so many different media, that some manufacturer would duplicate it. You mention the original manufacturers retired; that something went wrong with the new owner? Can the formula not be transferred to someone who could make it? Come ON, chemists! There’s a market out here!!

  4. Hello, Ginger. I read article and comments but didn’t see any references to using PYMII to seal gold/silver leaf. Do you have experience with that?
    Thank you.

    1. PYM II is a very lightweight coating that has about the same body as hairspray. It will not form a thick protective layer to prevent it being scratched off. It will, however, form a light coating to help protect it against oxidation and will help it stay shiny.

  5. FYI, their website says that as of March 2018 it will no longer be manufactured. :-/

  6. HI!! Have you used PYM on clay painted with acrylic (like Liquitex Basics or Folk Art, etc)? How does it hold up? Any chips? Stickiness?


    1. Yes, I’ve used PYM over acrylic paint. It works just fine.

      If your item will be subjected to wear that causes chips, then it’s best that it not be painted. You can create the item from colored clay instead. If you are using light washes of color that might not be terribly durable and you want a little bit extra protection, a varnish will help.

      PYM II is not a varnish. It’s a light-bodied finish that is used to fix surface treatments and give a bit of coverage to keep surface treatments from rubbing off. It’s more like a fixative and its thickness is a bit like that of hairspray. Many coats will build up to make a thicker coating, but if you need a tough coat then a varnish would be superior.

  7. Dear Ginger,have you noticed any yellowing or other color changes overtime after using PYM? I would appreciate your answer. Thank you!

  8. Hi I was told to try this on some shoes I painted that will be worn. Would this hold up to that? The paint I used is called Unicorn Spit and I also used a metallic acrylic paint

    1. I’ve never used Unicorn Spit (though it does look to be a really fun product), so I can’t speak for how well it would work. PYM II is very light-bodied and not at all durable for something that gets a lot of wear and abrasion.

  9. Hi Ginger, the only reason I find the spray might be the best idea to varnish polymer is when I have dusted a bit of this lovely shimmery metallic mica powder on my piece. Brush on varnishes seems to kind of tarnish that look….so I am hoping PYM II would do that job 🙂

  10. Love your feedback, always so helpful. However, quick question, PYM II is not sold in Canada, so do you think that Pebeo Satin Acrylic Spray Varnish can be alternative to use ? it is composed of acrylic resin and polyethylene wax ( what do you think?

    1. There is a slim chance that it might work, but I have tested (and wasted money on) many sprays and it’s very, very rare to find one that won’t be sticky on polymer clay. PYM II can be bought from in Canada, I believe. Also, Helmar Crystal Kote can be shipped to Canada if you order from the company and it works beautifully on polymer clay. Depending on your use, you might prefer to use one of the many brush-on varnishes instead. They often have a superior finish.

  11. They way you describe PYM it sounds the same as the Krylon “Preserve It!” Has anyone tried this? Way cheaper besides.

  12. Pingback: Polymer Clay Faux Opal Test Beads | KarenAScofield

  13. Hello everyone,
    Looking for an outdoor strong sealant for air dry polymer clay garden figures and decorations that I make, what would anyone recommend using? I was reading up on PYM ll and did not find any comments if anyone has used it outdoors.

    1. I wouldn’t use PYM outdoors. It’s more of a light sealer or fixative than a heavy varnish. Air dry polymer isn’t something I’m familiar with, but I don’t think it contains plasticizers. You can therefore use whatever varnish you have on hand. I think. As always, do a test on a sample to make sure. Have fun!

  14. Thanks to you and everyone for your input,

    How is Pmyii effect on Quilling jewelry that is paper and how would it work on Pineneedle basket. and on chrocet cord basket made with jute ,yarn, or cords?

    1. PYM is a very light-bodied surface protectant that will work on any of those surfaces. Perhaps not the corded ones, though, because if you use enough of it to saturate the cord, then it will have trouble drying. There’s no advantage to using it on them in a light spray, I wouldn’t think.

  15. Pingback: Sealers for Polymer Clay | Serenity Clay

  16. Hi. I am going to be teaching a gifted & talented Pokemon Biology class for 5th and 6th graders on a limited budget. Since I love using polymer clay, I thought it would be cool to have students make their own pokemon and decribe adaptations they have.

    My plan is to buy the 1.75 Ib original white Sculpey clay (I would rather go Premo! But I can’t afford it for 16 students) and bake it for them then let them paint it with acrylics. Then I was wondering what would be the easiest for me to quickly seal 16 projects that will ultimately just be sitting in their room. The PYM seems expensive for my budget, so I was wondering “how far” this can goes? Would you think a 12ounce can would cover 16 projects if each student is given ~2ounces of sculpey clay? Or could there be a better solution?

    Thanks so much for the help!

    1. Sounds like a fantastic class idea. Yes, one can of PYM would be enough. However, you don’t need to use it. Acrylic paint will adhere quite well to Original Sculpey and will not need to be sealed at all. If you truly feel that you need a sealer, you can use a water-based brush-on varnish such as Minwax Polycrylic or Varathane Polyurethane. If you need to use a spray, I’d pick Varathane Spray as it’s far more readily available than PYM and will work just fine for your purpose. And yes, one can should cover it. But I wouldn’t bother with any sealer or varnish. Good luck!

      1. Thanks! I appreciate the advice. I have barely used acrylics with my polymer clay since I usually mix clays to get the colors I want. Without having to buy the sealer I may be able to upgrade the clay to Super Sculpey to be a bit stronger for the student’s pokemon scultures. 🙂

    1. You can use PYM II to seal any kind of surface treatment on polymer clay, including the paint deposited using a silk screen technique. However, paint used in this way will usually stick quite well to the clay and a sealer is not needed. If you find the paint is peeling off the polymer clay or needs protection from abrasion, then using resin would be far more productive. Or you could use a different paint.

  17. Angie Pettigrew

    I have been unable to find PYM2, but wonder if Krylon Preserve It would be a comparable product. It is labeled to work on many surfaces (archival/acid free like the PYM2 product) including ceramics. Have you any info or have you used this item?

    1. I really don’t know anything about that product. I can say that I’m currently doing a test with 9 different clear spray finishes, all which say they’re good for plastic, and most are already an epic, sticky fail. Few of us can find PYM II in a store. It’s a “bite the bullet and order it online” kind of thing. But it’s worth it if you need a spray. You could always try the Krylon Preserve, but do a test first. Don’t use it on something that matters.

  18. I loved Varathane, it looked great, but 50% of the time it would peel. If I applied it on a clera day, perfect, cloudy? The humidity made it peel (those conditions happened within hours of eachother once, so 2 identical pieces turned out different in one day).
    If I could be guaranteed it would never peel maybe I’d give it a shot, but for now I’m going the labor intensive route: Sanding my clay using 10 grits of automotive grade sandpaper. It takes at least an hour but the effects last forever. The plus side too is that it’s environmentally more friendly

    1. All sealers will peel on certain clays. Kato and Premo seem to be the most likely to have peeling (whereas Fimo is more likely to have stickiness). Varathane almost always peels if you dig at it hard enough. I never recommend a sealer unless you have to use one. But if you do, Varathane performs better in more situations than anything else I’ve tried. It’s not perfect, but it does seem to be one of the best. (ie, there are no really perfect sealers for polymer clays)

  19. Pingback: Spray Sealants for Polymer Clay | KarenAScofield

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