EasyFlo Black -Black Polyurethane Resin - Black color-

EasyFlo Black is a low-viscosity polyurethane resin that produces deep black casting parts without the need for additional pigment. Its 1A:1B mix ratio by weight and volume and its low viscosity make it especially convenient for mold casting, achieving a final Shore Hardness of 70D with excellent mechanical properties.

Technical specifications

* Cure time varies depending on ambient temperature and mixed mass.

What it is used for

EasyFlo Black is designed for any application requiring rigid black parts with high detail definition and no additional pigmentation steps. It is a common choice in special effects workshops, industrial design, and fine arts:

• Artistic reproductions and sculptures in solid black
• Rapid prototyping of functional or decorative parts
• Special effects and character work (FX) in film, television, and theatre
• Series production of small parts by casting in silicone molds
• Scale models and presentation models
• Replicas of industrial or prop objects

How to use it

1. Shake or stir each component separately before opening, as they may settle during storage.
2. Prepare the mold and apply a release agent if the mold material requires it (especially for polyurethane, plaster, or wood molds).
3. Weigh or measure parts A and B in a 1:1 ratio in a clean, dry container. Accurate measurement improves the cure.
4. Mix vigorously for 20-30 seconds, scraping the sides and bottom of the container thoroughly. The pot life is 1-2 minutes — work quickly.
5. Pour the mixture into the mold in a continuous, thin stream to minimise air bubble incorporation.
6. Allow to cure for 10 to 15 minutes before demoulding. At low temperatures the cure may take slightly longer.
7. Once demoulded, the part can be worked (sanded, drilled, painted) without issues after full cure.

Usage tips

Temperature control

The temperature of the mold and the environment directly affects pot life and cure time. Below 20 °C the cure slows down and parts may show greater initial flexibility. Above 25-28 °C the pot life drops to under a minute, which can make casting in complex molds difficult. Work preferably between 20 and 25 °C for consistent results.

Minimising bubbles

With a viscosity of only 200 cP, EasyFlo Black flows well, but vigorous mixing incorporates air. Use a tall, narrow container for mixing and pour in a thin stream from some height. If you have a vacuum chamber, degassing the mixture for 30-45 seconds before casting eliminates virtually all bubbles. For production runs, a pressure chamber during cure also gives good results.

Storage and shelf life

Store components in their original, tightly closed containers in a dry place at temperatures between 15 and 25 °C. Avoid storage in areas with large temperature fluctuations or high humidity. Once opened, use the components as soon as possible. If component A (polyol) crystallises due to cold, warm it gently in a water bath until it returns to a uniform liquid state.

Frequently asked questions