Smooth-Cast Onyx Fast - Ultra-Black Urethane Resin (Gallon Unit)
ONYX offers the convenience of a 1A:1B by volume mix ratio and has a very low viscosity, so it is easy to mix and pour.
Smooth-Cast Onyx Fast - Ultra-Black Urethane Resin (Gallon Unit)
Nº de artículo: 54297542

Smooth-Cast Onyx Fast - Ultra-Black Urethane Resin (Gallon Unit)

Nº de artículo: 54297542

USD 218

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ONYX offers the convenience of a 1A:1B by volume mix ratio and has a very low viscosity, so it is easy to mix and pour.
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What Stands Out

Ultra-Black Finish
Achieves a deep, rich black color that's perfect for creating striking visual effects in various applications, setting it apart from standard resins.
Quick Curing Formula
Designed for fast curing, this resin reduces waiting times for projects, allowing users to complete tasks quickly without sacrificing quality.
Versatile Applications
Ideal for casting, molding, and prototyping, Smooth-Cast Onyx Fast serves a diverse range of industries, meeting the needs of artists, designers, and manufacturers alike.

Detalles de producto

Shop the best deals for Smooth-Cast Onyx Fast - Ultra-Black Urethane Resin - Pint Unit at Ubuy Puerto Rico. Get fast and reliable worldwide shipping for all your crafting needs.
  • Convenient if you desire a black casting, adding color pigment is not necessary (can be polished and buffed to a high gloss shine)
  • Unlike other black resins, ONYX does not contain mercury
  • ONYX offers higher heat resistance vs. competitive black resins
  • ONYX is less expensive vs. other black resins
  • Shore 80D
Is Discontinued By ManufacturerNo
ManufacturerSmooth-On, Inc.
Date First AvailableFebruary 24, 2014
Item Weight9 lbs (4.08 kg)

Who Should Buy?

Suitable For
  • Artists and Creators

    Ideal for artists seeking to create detailed sculptures and models with a fast-curing, high-quality black finish.

  • Mold Makers

    Perfect for mold makers needing a quick and durable resin for producing intricate molds and castings.

  • Repair Professionals

    Useful for professionals in need of a reliable and fast-curing resin for repairs and bonding applications.

Not Suitable For
  • Beginner Crafters

    Less suitable for beginners who may struggle with precise mixing and handling of fast-curing resins.

DESCRIPCIÓN DEL PRODUCTO

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Preguntas y respuestas de los clientes

  • Pregunta: What is Smooth-Cast Onyx Fast used for?

    Respuesta: Smooth-Cast Onyx Fast is primarily used for casting applications where a high-quality, ultra-black finish is desired. It is ideal for creating intricate molds, sculptures, and prototypes. Its rapid curing time allows users to achieve impressive results without lengthy wait periods, making it perfect for artists, DIY enthusiasts, and professionals in the manufacturing sector.
  • Pregunta: How do I mix Smooth-Cast Onyx Fast?

    Respuesta: Mixing Smooth-Cast Onyx Fast involves combining equal parts of Part A and Part B in a clean container. Thoroughly stir the mixture for 2-3 minutes to ensure a homogeneous consistency. Proper mixing is essential for achieving optimal curing and performance. It's best to use a scale for precision, especially for larger projects, to ensure correct ratios for effective results.
  • Pregunta: Can Smooth-Cast Onyx Fast be tinted or colored?

    Respuesta: Yes, Smooth-Cast Onyx Fast can be tinted with compatible colorants or pigments. This flexibility allows users to achieve various shades while maintaining the glossy, ultra-black finish. When tinting, it's advisable to start with small amounts to gauge color intensity before adding more.
  • Pregunta: What is the working time of Smooth-Cast Onyx Fast?

    Respuesta: Smooth-Cast Onyx Fast offers a working time of approximately 3-5 minutes after mixing. The quick-setting nature is advantageous for rapid prototyping and production needs. However, it’s recommended to plan your project in advance to maximize the working time effectively, especially when dealing with intricate designs.
  • Pregunta: Is Smooth-Cast Onyx Fast suitable for outdoor use?

    Respuesta: Yes, Smooth-Cast Onyx Fast is suitable for indoor and outdoor applications. Its durability and resistance to environmental factors make it a viable choice for outdoor sculptures, signage, or decorative elements. However, applying a UV-resistant topcoat can enhance longevity when exposed to direct sunlight.
  • Pregunta: Can I use Smooth-Cast Onyx Fast for food-related applications?

    Respuesta: Smooth-Cast Onyx Fast is not recommended for food-related applications. While it is safe once cured, it is not formulated for direct contact with food, so it’s best used for artistic pieces or non-food items. For food-grade projects, it’s prudent to seek products specifically designed for food safety.
  • Pregunta: What release agent should I use with Smooth-Cast Onyx Fast?

    Respuesta: Using a release agent is essential to prevent adhesion between your mold and the cast material. Silicone-based release agents or polyurethane-specific release sprays are effective choices. Apply the release agent to your mold before pouring the resin to ensure a smooth demolding process and prevent damage to your mold.
  • Pregunta: How long does Smooth-Cast Onyx Fast take to cure completely?

    Respuesta: Smooth-Cast Onyx Fast typically cures to handling strength within 30-45 minutes, while full cure can take approximately 24 hours. Ambient temperature and humidity also influence curing times, so it’s beneficial to conduct your projects in a controlled environment for optimal results.
  • Pregunta: Where can I buy Smooth-Cast Onyx Fast - Ultra-Black Urethane Resin Gallon Unit in Puerto Rico?

    Respuesta: You can purchase Smooth-Cast Onyx Fast - Ultra-Black Urethane Resin Gallon Unit from Ubuy. Ubuy offers a convenient online shopping experience with a diverse selection of products, including specialty resins. Their platform ensures that you can find the exact item you're looking for while providing a user-friendly experience for your purchase.

Nutritionist's Take

Smooth-Cast Onyx Fast is not a food item but a urethane resin used primarily in crafting, industrial applications, and mold making. As such, nutritionists do not analyze it in terms of dietary benefits or nutritional value, as it is not intended for consumption. This product does not offer any health claims, nor does it provide any nutritional benefits. In fact, exposure to urethane resins can pose potential health risks if not handled properly, including respiratory issues. Therefore, it is crucial for consumers to recognize that this product is not suitable for any dietary needs and should be treated with caution in terms of safety rather than nutrition.

Smooth-On Molding & Casting Editorial Review

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Smooth-Cast Onyx Fast-Ultra Black Urethane Resin is a fast-curing plastic material suitable for casting automotive and tractor mirror mounting spaces or fluid-dripping effects. Smooth-Cast Onyx Fast is incredibly resilient, sandable and drillable making it perfect for artistic displays. Surfaces coated with Smooth-Cast Onyx Fast effortlessly holds screws tightly into place. The material is easy to use but should be poured in moderate quantities based on specific usage instructions. The plastic is ideal for slush pouring with a quick setting time. The plastic is suitable for filling in voids for plastic parts and casting outdoor furniture replacement parts.

Customer Reviews & Ratings

4.6
323 valoraciones de los clientes
  • 5 estrella
    78%
  • 4 estrella
    13%
  • 3 estrella
    5%
  • 2 estrella
    0%
  • 1 estrella
    4%

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ventajas

  • Sets quickly and works exactly as advertised
  • Durable, sandable and drillable
  • Ideal for crafting artistic displays
  • Suitable for filling voids
  • Intended for automotive use
  • Holds screws tightly in place
  • Perfect replacement for outdoor furniture

Contras

  • Short pot life

Platform Trust & Buyer Confidence

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“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”

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23 July 2026 · via Trustpilot
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Product Price History

Información importante

  • Limitaciones: Para los productos enviados al extranjero, ten en cuenta que cualquier garantía del fabricante puede no ser válida; las opciones de servicio del fabricante pueden no estar disponibles; los manuales del producto, las instrucciones y las advertencias de seguridad pueden no estar en los idiomas del país de destino; los productos (y los materiales que los acompañan) pueden no estar diseñados de acuerdo con las normas, especificaciones y requisitos de etiquetado del país de destino; y los productos pueden no ajustarse al voltaje del país de destino y a otras normas eléctricas (lo que requiere el uso de un adaptador o convertidor, si procede). El destinatario es responsable de asegurarse de que el producto puede ser importado legalmente al país de destino. Cuando hagas un pedido a Ubuy o a sus filiales, el destinatario es el importador registrado y debe cumplir todas las leyes y normativas del país de destino.
  • No todos los productos que aparecen en Ubuy están a la venta, ya que Ubuy es un motor de búsqueda a nivel mundial. Los productos están sujetos a las normas de exportación/comercio.