--- product_id: 738028238 title: "Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc." brand: "smooth-on" price: "R413" currency: ZAR in_stock: false url: https://www.desertcart.co.za/products/738028238-smooth-on-smooth-cast-300-liquid-plastic-compound-smooth-cast store_origin: ZA region: South Africa --- # Fast 5-min cure time Precise 2-pint kit volume High strength plastic Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. **Brand:** smooth-on **Price:** R413 **Availability:** ❌ Out of Stock ## Summary > ⚡ Mold your ideas fast, mold your future faster! ## Quick Answers - **What is this?** Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. by smooth-on - **How much does it cost?** R413 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/738028238-smooth-on-smooth-cast-300-liquid-plastic-compound-smooth-cast) ## 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 - • **Compact & Portable:** Lightweight 907g kit fits easily into any workspace or on-the-go setup. - • **Rapid 5-Minute Cure:** Get professional-grade results in record time—no more waiting around. - • **Optimized 2-Pint Kit:** Ideal volume for precise projects without waste or excess. - • **Multicolor Versatility:** Add a splash of creativity with vibrant, multicolor options. - • **Durable High-Strength Plastic:** Engineered for toughness, perfect for prototypes and durable parts. ## Overview Smooth-On Smooth-Cast 300 is a 2-pint liquid plastic compound designed for rapid 5-minute curing and high-strength durability, perfect for professionals seeking quick, reliable molding solutions in a compact, multicolor kit. ## Description Easy 1:1 ratio; Can be sanded, primed and painted; Quick cure time; 2 pint kit ## Features - Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 - 2 pint kit ## Technical Specifications | Specification | Value | |---------------|-------| | Part number | 47641 | | Item Weight | 907 g | | Product Dimensions | 18.8 x 15.24 x 7.87 cm; 907.18 g | | Is Discontinued By Manufacturer | No | | Color | multicolor | | Material | Plastic | | Grit Rating | 300 | | Batteries Included | No | | Batteries Required? | No | | Item Dimensions LxWxH | 18.8 x 15.2 x 7.9 cm | ## Product Details - **Material:** Plastic - **Item dimensions L x W x H:** 18.8 x 15.2 x 7.9 cm - **Brand:** Smooth-On - **Item Weight:** 907 g - **Grit Number:** 300 ## Images ![Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. - Image 1](https://m.media-amazon.com/images/I/81gwmekNnqL.jpg) ![Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. - Image 2](https://m.media-amazon.com/images/I/71ZWTS1-Q2L.jpg) ![Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. - Image 3](https://m.media-amazon.com/images/I/81ubKEjBDDL.jpg) ![Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. - Image 4](https://m.media-amazon.com/images/I/71Koo4ru1vL.jpg) ![Smooth-On Smooth-Cast 300 Liquid Plastic Compound Smooth-Cast 300 by Smooth-On, Inc. - Image 5](https://m.media-amazon.com/images/I/71LJ0Lk-VZL.jpg) ## Questions & Answers **Q: Can I add glitter to this?** A: I've used 325 with glitter pigments, and it works very well. You'll have to add a decent amount of glitter and it will take longer to cure. **Q: Can I use this to cast a dome-shaped mask using a silicone mold? Will it stay liquid long enough for me to tilt it back & forth to form an even coat?** A: Smooth-Cast 300 is a snap cure material - a better choice may be Smooth-Cast 325 or Smooth-Cast 65D, both of which have a gradual cure profile. **Q: is it machinable?** A: Yeah, to an extent. I’ve taken a dremle tool to casted plastic to sand down parts and remove unwanted flashing that occurs. It’s pretty tough stuff, let it cure for a day or two before sanding or working on thinner areas, but I’ve even taken a hacksaw to some castings and they have held up just fine. **Q: Is this a silicone or a urethane?** A: This is a urethane casting resin. ## Frequently Bought Together - Smooth-Cast™ 300: Bright White, Low Viscosity, Liquid Plastic Casting Resin - Pint Unit - Smooth-On Mold Star™ 16 Fast Platinum Silicone Rubber, Silicone Mold Making Kit - Pint Unit - Smooth-On Universal Mold Release - 14 Fluid Ounce Aerosol Can --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/738028238-smooth-on-smooth-cast-300-liquid-plastic-compound-smooth-cast](https://www.desertcart.co.za/products/738028238-smooth-on-smooth-cast-300-liquid-plastic-compound-smooth-cast) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-04-28*