Any commercially available sea anemone that you would buy to use as an original model would not give the best representation of the sea creature. For the most realistic and unique representation, creating your own sea anemone using modeling clay is best. Sculpting this model is not as complicated a task as you might think. Proper positioning of the tentacles is key to attaining realism.
Creating your own bulb-tip sea anemone offers several advantages:
In the step-by-step gallery below, you will learn how to make a bulb-tip sea anemone using
mold making and casting materials.
First create your base. Then roll your own tentacles. Use Chavant brand non-sulfur clay.
Completed sea anemone sculpt secured to base board.
Surround with a mold wall that will give you at least 0.5" on all sides of the mold from the edges of the tentacles.
Be sure that it is centered inside the mold wall.
Hot glue the edges of the mold wall to the base board.
Mold Star 15 silicone rubber is used to create the mold. It has a mix ratio of 1 part A to 1 part B by volume.
Dispense an equal part of B.
Thoroughly mix part A and B until there are no streaks. Mold Star 15 does not require vacuum degassing.
Pour the rubber into the lowest part of the mold in a long, thin stream.
Pour rubber in a single spot and let it rise over the model and seek its own level.
Completed pour. Mold Star 15 has a pot life of 50 minutes and a cure time of 4 hours.
To demold your original, cut the plastic mold wall and remove it completely.
Lift the entire mold to separate it from the base.
You will need to cut open your mold open in 4 places in order to demold your original piece. It is helpful to have a friend help hold the mold open while cutting.
Continue cutting just enough so that you can demold your piece. Do not cut your mold all the way to the bottom.
The original sea anemone has been successfully demolded and is ready for casting. All the detail has been captured by the mold rubber.
Align the cut seams and use rubber bands to close the mold.
Align the cut seams in the mold. The mold has been secured with rubber bands. Since we will pour an EcoFlex silicone casting, we need to apply a release agent to prevent bonding.
Since it will be difficult to reach all of the thin tentacle areas of the mold, a liquid release agent is your best option. Combine 2 parts isopropyl alcohol and 1 part dish washing soap.
Mix the alcohol and soap together until blended thoroughly.
Rotate to thoroughly coat the tentacle cavities.
Thoroughly drain the excess release liquid. Allow it to dry for 30 minutes before mixing and pouring your rubber casting.
EcoFlex 00-30 supersoft silicone rubber will be used to make the casting. It has a mix ratio of 1 part A to 1 part B by volume.
Ignite fluorescent color pigments that glow under UV light are used to pigment the silicone.
Pre-mix the Ignite red pigment.
Mix the Ignite red into part B until there are no streaks. The pigment is concentrated so a little goes a long way.
Pour part A into the colored part B.
Thoroughly mix parts A and B together to remove all color streaks. EcoFlex 00-30 has a pot life of 45 minutes and a cure time of 4 hours.
Use a vacuum chamber to vacuum out air bubbles within the silicone. The silicone will rise, break and fall. Your vacuum must pull 29 inches of mercury for complete vacuum.
Slowly pour the vacuumed silicone into the mold cavity.
Allow EcoFlex 00-30 to cure for at least 4 hours at room temperature (73 F).
When fully cured, remove the rubber bands from the mold.
Slowly pull apart the cut seams of the mold. Slowly pull and wiggle your casting out of the mold.
The fully cured casting is life-like and vibrant.
EcoFlex 00-30 is soft and stretchy.
You can vary and combine color pigments or paint your finished piece using EcoFlex 00-30 to create an infinite number of casting effects.
Position and secure your sea anemone in your aquarium.
Your sea anemone casting is identical to the real thing. Tentacles dance freely and realistically in your aquarium.
You can create a variety of sea creatures for your aquarium. View our other videos and galleries to learn how.