---
product_id: 16459202
title: "Smooth-Cast™ 305 Liquid Plastic Resin for Special Effects, & More, White - Pint Unit"
brand: "smooth-on"
price: "C$4026"
currency: NIO
in_stock: true
reviews_count: 8
category: "Smooth On"
url: https://www.desertcart.ni/products/16459202-smooth-cast-305-liquid-plastic-resin-for-special-effects-more
store_origin: NI
region: Nicaragua
---

# 30-minute fast, reliable cure time Ultra-low viscosity for bubble-free pours 1:1 mix ratio by volume for effortless blending Smooth-Cast™ 305 Liquid Plastic Resin for Special Effects, & More, White - Pint Unit

**Brand:** smooth-on
**Price:** C$4026
**Availability:** ✅ In Stock

## Summary

> 🎨 Cast your vision flawlessly—fast, bright, and bubble-free!

## Quick Answers

- **What is this?** Smooth-Cast™ 305 Liquid Plastic Resin for Special Effects, & More, White - Pint Unit by smooth-on
- **How much does it cost?** C$4026 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/16459202-smooth-cast-305-liquid-plastic-resin-for-special-effects-more)

## Best For

- smooth-on enthusiasts

## Why This Product

- Trusted smooth-on brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Durable & Versatile:** Craft tough, long-lasting sculptures, prototypes, and special effects with confidence.
- • **Speed Meets Control:** 30-minute cure time balances quick turnaround with ample working time—ideal for multiple casts daily.
- • **Bubble-Free Brilliance:** Achieve flawless, bright white castings every time thanks to ultra-low viscosity resin.
- • **Creative Freedom Unleashed:** Perfect for artists and makers craving mind-blowing effects and seamless color integration.
- • **Effortless Precision Mixing:** Simplify your workflow with a perfect 1:1 volume ratio—no guesswork, no mess.

## Overview

Smooth-On Smooth-Cast™ 305 is a bright white, ultra-low viscosity urethane resin designed for quick, durable castings with a convenient 1:1 mix ratio and a 30-minute cure time. Ideal for small to medium sculptures, prototypes, and special effects, it delivers bubble-free results and versatile creative potential, making it a top choice for professionals and hobbyists alike.

## Description

desertcart.com: Smooth-On Smooth-Cast™ 305 Liquid Plastic Resin for Special Effects, & More, White - Pint Unit : Industrial & Scientific

Review: Excellent Product - I’ve used a lot of casting resins and urethanes and this is one of the best Smooth-On has to offer. I like it better than 300 (2 min pot life and 10 minute cure), as 305 has a manageable pot life of 8 minutes and a cure time of 30. These characteristics make it an ideal material if you need to produce several casts in a day, while providing adequate time to mix and pour into your molds. The plastic is bright white as advertised when cured and durable. I’m producing very small castings (4-6 grams of material at a time) and the 1-1 volume ratio is very easy to mix and follow.
Review: Item was as described - This resin worked very well for my project. The resin itself is quite sturdy after casting and was easy to measure out before casting. I highly recommend!

## Features

- Ultra-Low Viscosity Casting Resin - Virtually bubble-free, bright white resin for quick, versatile castings.
- Broad Application - A fast cure resin for small to medium sculptures, prototype models, special effects props, etc.
- Mix Ratio of 1:1 By Volume - Easy to use urethane resin - Cure Time of 30 minutes - Cures tough & durable.
- Great For Mind-Blowing Effects - The Smooth-Cast Series resin casting kits are excellent for a wide array of coloring & effects.
- Perform a small-scale test of your project materials to determine suitability and compatibility. Refer to the technical bulletin for more information - available on our website.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #48,395 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #456 in Sculpture Molding & Casting Products |
| Brand | Smooth-On |
| Color | White |
| Customer Reviews | 4.6 out of 5 stars 220 Reviews |
| Item Form | Liquid |
| Material | Plastic |
| Special Feature | Portable |
| Specific Uses For Product | Art, Casting |

## Product Details

- **Brand:** Smooth-On
- **Color:** White
- **Item Package Quantity:** 1
- **Material:** Plastic
- **Special Feature:** Portable

## Images

![Smooth-Cast™ 305 Liquid Plastic Resin for Special Effects, & More, White - Pint Unit - Image 1](https://m.media-amazon.com/images/I/71OvxkSuDSL.jpg)

## Questions & Answers

**Q: I want to make a mold of my dogs paw print. Will it pour into a print in the mudd and make a mold?**
A: I would think the moisture would inhibit the curing of the resin, another way to get that imprint would be to pour plaster into the muddy pawprint and let it harden then wash off  the mud.

**Q: How is the pot life?  I dont have a pressure pot so I need a slow set resin for figure parts.  This still may not be enough time for me**
A: Smooth On has three white resins: Smooth Cast 300 is way too fast for me - 3 minutes - the stream of resin I am pouring into a 2nd or 3rd mold becomes a frozen waterfall. Smooth Cast 305 works for me: pot life of 7 minutes so I pour it (clear) into my mold and after 5 minutes it starts to turn cloudy and its cured in 30 minutes. I have never bought it but the literature says they have Smooth Cast 310 with a pot life of 15-20 minutes, cure time 3-4 hours.

**Q: How resistant to ultraviolet light is this material?**
A: Hard to say. I never really thought about that. I usually paint my casted pieces, however I have many extra's casts, that have been laying around for several years, and I do not see any discoloration or any other aging effects. I'd need more information as to what you want to cast, to know if this is the right choice for you, as there are many other casting materials, such as plasters and resins. My advice is to test it out. It's not terribly expensive. You might really like it. I love the stuff,

**Q: I’m looking for a very mailable, rubber, casting material, any suggestions?**
A: for the molds or the items cast out of a mold? with the right mold release, or a PVA liner you can cast silicone into silicone. I also like flexible urethane expanding foam rubber (most of them are self skinning). You can get it in rigid or flexible, and it expands like the cans of greatstuff insulation, but stays foamy/flexible, and it much less expensive than latex foam rubber.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent Product
*by D***N on February 3, 2023*

I’ve used a lot of casting resins and urethanes and this is one of the best Smooth-On has to offer. I like it better than 300 (2 min pot life and 10 minute cure), as 305 has a manageable pot life of 8 minutes and a cure time of 30. These characteristics make it an ideal material if you need to produce several casts in a day, while providing adequate time to mix and pour into your molds. The plastic is bright white as advertised when cured and durable. I’m producing very small castings (4-6 grams of material at a time) and the 1-1 volume ratio is very easy to mix and follow.

### ⭐⭐⭐⭐⭐ Item was as described
*by A***R on January 6, 2026*

This resin worked very well for my project. The resin itself is quite sturdy after casting and was easy to measure out before casting. I highly recommend!

### ⭐⭐⭐⭐⭐ Great product!
*by L***R on January 8, 2026*

HAHAHA I accidently bought it thinking it was a larger set of silicone for making molds (which they should make), but learned too late that it was not the case. I encased a project I worked 3 weeks on in a huge block of plastic that took 2 weeks of being submerged in acetone to free - my bad. But I later fell in love with it as a material to work with, it cures very quickly and has great integrity and durability. Keep in mind it cures so quickly that vacuuming is not always an option. It is very easy to use and worth the money. You can color it with dye but it mixes translucent and cures opaque so the color it will be is a bit of a guess.

## Frequently Bought Together

- Smooth-On Smooth-Cast™ 305 Liquid Plastic Resin for Special Effects, & More, White - Pint Unit
- Mold Star 15 Slow - 1A:1B Mix by Volume Platinum Silicone Rubber - Pint Unit
- Smooth-On Universal Mold Release - 14 Fluid Ounce Aerosol Can

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-02-21*