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Smooth-On Smooth-Cast 325 ColorMatch Liquid Plastic Compound Smooth Cast 325

4.5 4.5 out of 5 stars 546 ratings

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Brand Smooth-On
Color Clear Amber
Material Resin
Item Weight 32 Ounces

About this item

  • ideal for making marble-like resin, clear colored gems and more!
  • Easy to use, just add color to the clear mix
  • 10 minute demold time
  • can be easily tinted with smooth-on so-strong colorants

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Smooth-On Smooth-Cast 325 ColorMatch Liquid Plastic Compound Smooth Cast 325


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Product Description

New fast-cast resin that was developed specifically for adding color pigments and fillers to achieve true color representation or filler effect. Small amounts of pigment will yield accurate, vivid colors from cured castings. Vacuum degassing is not necessary. Convenient one-to-one mix ratio (one part A to one part B by volume). The differences between them are pot life and demold time. Fully cured castings are tough, durable, machinable and paintable. They resist moisture and mild solvents. Applications for Smooth-Cast Liquid Plastics include reproducing small to medium size sculptures, cold cast bronze castings, making prototype models, roto cast pieces, special effect props, and decorative jewelry. Net weight 32 oz. (909 grams).Technical Information: pot life: 2.5 minutes, demold time (depending on mass): 7-10 minutes, shrinkage: .01 in./in., viscosity: 100 cups, S.G. g/cm3: 1.07, S.V. cu. in./lb.: 27.7, ultimate tensile strength: 3,170 PSI

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Customer reviews

4.5 out of 5 stars
4.5 out of 5
546 global ratings

Customers say

Customers like the performance, quality and ease of use of the sculpting material. They mention that it works well, is worth the money and that it's super easy to use. Some are satisfied with smoothness. However, some customers are disappointed with bubbles. Customers also differ on speed, durability, and color.

AI-generated from the text of customer reviews

26 customers mention21 positive5 negative

Customers like the performance of the sculpting material. They mention that it works well, is easy to use, and produces pretty nice results. Some say that the product is worth the money.

"Works perfectly, hardens quickly, paints easily, and great durability. This is my first time using casting material and process...." Read more

"...Worth the money, although when poured clear, cures with a slightly yellowish tint. Not ideal for crystal clear pours...." Read more

"...rotocasting to replicate some light covers and I ended up with pretty nice results. I colored it using eye candy pigment powder, and it held well...." Read more

"...This blows the others out of the water, in performance AND price." Read more

22 customers mention22 positive0 negative

Customers like the quality of the sculpting material. They say it's a good product that works well to produce clear canopy parts for models. It hardens quickly, and it' s great for their current projects. It has a pretty solid sheer when mixed correctly, and takes color very well. It's durable and perfectly fine to paint.

"...It has a pretty solid sheer when mixed correctly, and it takes color very very well!..." Read more

"Works perfectly, hardens quickly, paints easily, and great durability. This is my first time using casting material and process...." Read more

"...The SmoothCast 300 is a fantastic resins, like the 380...." Read more

"...It's ridged, durable, and perfectly fine to paint, so the clearness of the cast was probably user error." Read more

14 customers mention14 positive0 negative

Customers find the sculpting material easy to use. They mention that it is super easy to apply with other smooth on products, the bottles contain easy-to-follow instructions, and the process went smoothly. Some customers also say that it's great for beginners.

"...Easy to use, can be adapted to serve multiple uses, and when I've contacted Smooth-On they have had people who are actually familiar with their..." Read more

"...This is my first time using casting material and process. The process went smoothly and I got good parts on my first try...." Read more

"Very easy to work with!!" Read more

"...of pot time, cures fairly fast and it is the HARDEST of them all. Once dried, the edge if a part after 20 min...." Read more

4 customers mention4 positive0 negative

Customers like the smoothness of the sculpting material. They mention that it's soft when they remove it from the mold, but hardens within a few hours.

"...It takes dyes really nicely as well. Its soft when you remove it from the mold but hardens within a day or so." Read more

"...Smooth on makes a great product that I have used for years and to run into a batch that is like this is extremely rare...." Read more

"Smooth..." Read more

"Smooooooth!..." Read more

16 customers mention11 positive5 negative

Customers are mixed about the speed of the sculpting material. Some mention that it's a great resin that sets fast, hardens quickly, and can be colored. It's great for quick casting and can also be colored, but some say that it hardening too fast.

"Works perfectly, hardens quickly, paints easily, and great durability. This is my first time using casting material and process...." Read more

"...As it sets fast, this stuff works great for including chunky glitter, gold leaf, or inclusions, avoiding a lot of unwanted sinkage that you'll get..." Read more

"...It's crystal clear without any pigments or dyes. As it claims, it cures fast and can be taken out of the mold in 10-15 minutes, and becomes rock-..." Read more

"...It definitely does not fully cure in 10 minutes. Also, if you are trying to do a clear mold, I would not recommend this one...." Read more

11 customers mention6 positive5 negative

Customers have mixed opinions about the durability of the sculpting material. Some mention that the cast pieces last a long time, while others say that it's not gonna be brittle and won't hold its shape. The molds themselves don't last very long, and the thin shell will deform and risks tearing.

"Works perfectly, hardens quickly, paints easily, and great durability. This is my first time using casting material and process...." Read more

"...It is soft at firdt, and rhe thin shell will deform and risks tearing. It definitely does not fully cure in 10 minutes...." Read more

"...great, can be oven heater to 120Deg to accelerate the cure and lasts a long time (at least 5 to 8 years)...." Read more

"...detailed castings... The price is just too steep for such a short lifespan of the molds and the amount you get." Read more

9 customers mention6 positive3 negative

Customers have mixed opinions about the color of the sculpting material. Some mention that it works well, it takes to tints as expected, and is crystal clear without any pigments or dyes. However, others say that it cures with a slightly yellowish tint, and that it's not snow white but a dirty cloudy yellow.

"...It has a pretty solid sheer when mixed correctly, and it takes color very very well!..." Read more

"...Worth the money, although when poured clear, cures with a slightly yellowish tint. Not ideal for crystal clear pours...." Read more

"...Very few, if any bubbles. It's crystal clear without any pigments or dyes...." Read more

"Product is great to make clear windshields for diecast and slot cars" Read more

7 customers mention0 positive7 negative

Customers dislike the bubbles in the sculpting material. They say that the product produces a lot of bubbles, and the amount of bubble is ridiculous. Some customers also have issues with the product bubbling up after the pour.

"...The bubbles don't seem to touch the surface, so if you're going for a solid color you are good to go." Read more

"...Even then, i always found air bubbles in the casting, which is a bit annoying with a translucent resin...." Read more

"...too short of a pot life, doesn't blend well and is prone to air bubbles after sufficient blending that cannot be removed by the vacuum because the..." Read more

"...I had some issues with the product bubbling up after the pour this could likely be fixed by pulling the air out before the pour but i did not have..." Read more

Amazing isn't a strong enough word for this product
5 Stars
Amazing isn't a strong enough word for this product
Amazing isn't a strong enough word for this product. It takes detail, fine fine FINE detail very well. First introduced to this product at Gencon, I have used it in multiple builds, it has been used on stage, and exceeded expectations time and time again. I've used 325 for props but it's also been used to create items for daily use. It has a pretty solid sheer when mixed correctly, and it takes color very very well!I have yet to find a product by Smooth-On that has failed to deliver!Easy to use, can be adapted to serve multiple uses, and when I've contacted Smooth-On they have had people who are actually familiar with their product, and make intelligent suggestions from experience.Both the product and the Smooth-On seller here on Amazon are rock solidOn the pictures look closely at the unfinished silver of the Corvo mask I built, the fake tool marks I made in the monster clay transferred perfectly to the final cast. In the second build progress shot, you can see where the copper wire was being bent to fit the piece. The sheer of the 325 took the abuse without issue. The final shot was part of another build, and I happened to mask off half for paint. You can see in the shot how the 325 looked before and after paint and the fine detail that was caught. I did not make a single cast in a vacuum environment, these were all straight mold casts using Oomoo 30 and Smooth Cast 325
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Top reviews from the United States

Reviewed in the United States on August 15, 2017
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DrX
5.0 out of 5 stars Amazing isn't a strong enough word for this product
Reviewed in the United States on August 15, 2017
Amazing isn't a strong enough word for this product. It takes detail, fine fine FINE detail very well. First introduced to this product at Gencon, I have used it in multiple builds, it has been used on stage, and exceeded expectations time and time again. I've used 325 for props but it's also been used to create items for daily use. It has a pretty solid sheer when mixed correctly, and it takes color very very well!

I have yet to find a product by Smooth-On that has failed to deliver!

Easy to use, can be adapted to serve multiple uses, and when I've contacted Smooth-On they have had people who are actually familiar with their product, and make intelligent suggestions from experience.

Both the product and the Smooth-On seller here on Amazon are rock solid

On the pictures look closely at the unfinished silver of the Corvo mask I built, the fake tool marks I made in the monster clay transferred perfectly to the final cast. In the second build progress shot, you can see where the copper wire was being bent to fit the piece. The sheer of the 325 took the abuse without issue. The final shot was part of another build, and I happened to mask off half for paint. You can see in the shot how the 325 looked before and after paint and the fine detail that was caught. I did not make a single cast in a vacuum environment, these were all straight mold casts using Oomoo 30 and Smooth Cast 325
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9 people found this helpful
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Reviewed in the United States on July 22, 2020
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5.0 out of 5 stars Works perfectly, hardens quickly, paints easily, and great durability
Reviewed in the United States on July 22, 2020
Works perfectly, hardens quickly, paints easily, and great durability. This is my first time using casting material and process. The process went smoothly and I got good parts on my first try. The photo shows my mold and four medallions I cast. The medallions have been painted but not antiqued yet. The medallion to the right is the original.
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Reviewed in the United States on April 6, 2019
One person found this helpful
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Reviewed in the United States on April 11, 2022
2 people found this helpful
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Reviewed in the United States on October 5, 2023
Reviewed in the United States on June 25, 2020
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5.0 out of 5 stars Better than any other "fast cure" resin out there
Reviewed in the United States on June 25, 2020
I've been using this resin to make custom game controller buttons, and it always comes out beautifully! Very few, if any bubbles. It's crystal clear without any pigments or dyes. As it claims, it cures fast and can be taken out of the mold in 10-15 minutes, and becomes rock-hard within 4 hours. If you haven't had luck with resins such as PUDUO, ArtNGlow, etc... This is what you're looking for. This blows the others out of the water, in performance AND price.
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One person found this helpful
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Reviewed in the United States on August 3, 2023
Reviewed in the United States on February 4, 2016
30 people found this helpful
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Top reviews from other countries

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Michelle.
1.0 out of 5 stars :(
Reviewed in Mexico on February 22, 2024
Jennifer Pang
5.0 out of 5 stars Liquid Plastic Compound Smooth Cast 325
Reviewed in Singapore on March 22, 2021
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Jennifer Pang
5.0 out of 5 stars Liquid Plastic Compound Smooth Cast 325
Reviewed in Singapore on March 22, 2021
Received my item in good condition
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