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Accessories - 3 of 5Updated 13 November 2026

Demolding Rings

A demolding ring gives you a grip to pull a cured impression out of a cavity.

What a Demolding Ring Does

A demolding ring is a small plastic tube. Placed on a filled cavity, it holds a surplus of product above the part. Once cured, that surplus is the grip you hold to pull the impression out.

Demolding ring filled with F20 on top of a part

How to Use It

  1. Choose the ring that fits the diameter of the cavity before you inject.
  2. Fill the cavity, then stop injecting.
  3. Place the ring on the cavity and finish the injection inside it.
  4. Build a grip about 1 cm high.
  5. Take the ring off after polymerization, hold the grip firmly, and pull straight.

When You Need a Bigger Grip, or None

A large impression made with an XL product takes more force to extract. Use larger rings for a more generous grip.

With a Pasty product in a through bore, you do not need a ring. The surplus of product left at the entry is the grip.

Related Pages

Demolding Rings
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