--- product_id: 273889732 title: "Smooth-On Cast 305 Urethane Resin (Trial Unit)" brand: "smooth-on" price: "AED 193" currency: AED in_stock: true reviews_count: 5 category: "Smooth On" url: https://www.desertcart.ae/products/273889732-smooth-on-cast-305-urethane-resin-trial-unit store_origin: AE region: United Arab Emirates --- # 30 min demold time Bright white, paintable 1:1 mix ratio Smooth-On Cast 305 Urethane Resin (Trial Unit) **Brand:** smooth-on **Price:** AED 193 **Availability:** ✅ In Stock ## Summary > 🎨 Cast your vision with precision and style—because your creativity deserves the smoothest flow. ## Quick Answers - **What is this?** Smooth-On Cast 305 Urethane Resin (Trial Unit) by smooth-on - **How much does it cost?** AED 193 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ae](https://www.desertcart.ae/products/273889732-smooth-on-cast-305-urethane-resin-trial-unit) ## 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 - • **Flawless Finish:** Bright white, bubble-free castings ready for sanding and painting—your canvas awaits. - • **Rapid Creativity:** 7-minute pot life balances speed and control for rapid project turnaround without compromise. - • **Effortless Mixing:** One-to-one volume ratio means zero guesswork, just flawless blends every time. - • **Durable & Versatile:** Tough, moisture-resistant, and compatible with plastic, metal, and wood for all your prototypes and models. - • **Perfect Pace, No Rush:** 30-minute demold time lets you craft with precision, not pressure. ## Overview Smooth-On Smooth-Cast 305 is a low-viscosity, bright white urethane resin with a 30-minute demold time and 7-minute pot life. It features a simple 1:1 mix ratio, produces bubble-free, durable castings that are paintable and moisture resistant, ideal for prototyping, sculpting, and special effects. No vacuum degassing needed, making it perfect for professionals seeking reliable, high-quality results with controlled curing. ## Description SMOOTH-ON SMOOTH-CAST 305 - SLOWER CURE TIME Smooth Cast 305 liquid plastic is an ultra-low viscosity casting resin. Does Smooth-cast 300 cure too fast for you Problem solved. Smooth-Cast 305 cures slower than Smooth-cast 300 with a 30 minute demold time and 7 minute pot life. It yields castings that are bright white and virtually bubble free. Vacuum degassing is not necessary. Smooth-Cast offers the convenience of a one to one mix ratio (one part A to one part B by volume). 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, making prototype models, and special effects props. Review: Excelente resina - Buen rendimiento y duración. Era lo esperado. Review: Mehor de lonque esperaba muy bueno - Es muy bueno ## Features - SMOOTH-ON SMOOTH-CAST 305 - 2 Pint Kit - Comes with 30 minute demold time and 7 minute pot life - Cures Slower than Smooth-Cast 300, quick enough for rapid turnaround - Bright White Color, can be sanded and painted ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00ZGOSTTY | | Brand | Smooth-On | | Brand Name | Smooth-On | | Color | Bright White | | Colour | Bright White | | Compatible Material | Plastic, Metal, Wood, General-Purpose | | Container Type | Bottle | | Customer Reviews | 4.6 out of 5 stars 197 Reviews | | EU Spare Part Availability Duration | 30 Minutes | | Full Cure Time | 30 Minutes | | Included Components | 1 x Smooth Cast 300, 1 x Smooth Cast 500, 1 x Smooth Cast 700 | | Item Form | Liquid | | Item Package Quantity | 1 | | Item Weight | 907 g | | Item form | Liquid | | Manufacturer | Smooth-On | | Material | Plastic | | Material Type | Plastic | | Model | Smooth-Cast 305 | | Number of Pieces | 2 | | Other Special Features of the Product | Portable | | Part Number | FBASOSC305Trial | | Special features | Portable | | Specific Uses For Product | Craft, Model | | Specific uses for product | Craft, Model | | UPC | 035239000262 | | Viscosity Level | Low | | Volume | 16 Fluid Ounces | | Water Resistance Level | Water Resistant | ## Product Details - **Brand:** Smooth-On - **Item form:** Liquid - **Material:** Plastic - **Special features:** Portable - **Specific uses for product:** Craft, Model ## Images ![Smooth-On Cast 305 Urethane Resin (Trial 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 ### ⭐⭐⭐⭐⭐ Excelente resina *by C***N on 21 February 2022* Buen rendimiento y duración. Era lo esperado. ### ⭐⭐⭐⭐⭐ Mehor de lonque esperaba muy bueno *by O***Z on 4 March 2022* Es muy bueno ### ⭐⭐⭐⭐⭐ Item was as described *by A***R on 6 January 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! ## 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 --- ## 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.ae/products/273889732-smooth-on-cast-305-urethane-resin-trial-unit](https://www.desertcart.ae/products/273889732-smooth-on-cast-305-urethane-resin-trial-unit) --- *Product available on Desertcart United Arab Emirates* *Store origin: AE* *Last updated: 2026-07-14*