Why is my cured resin soft or cloudy?

Common Reasons for Soft or Cloudy Resin

The main culprits are often incorrect mixing ratios, insufficient mixing, high humidity, or removing the piece from its mould too early. Using an imprecise ratio of resin to hardener may leave the mixture under-cured and soft. Incomplete mixing can cause cloudiness or patchy spots. High moisture in the air can interfere with curing, and demoulding before the resin is fully set can result in both softness and a cloudy appearance.

How to Prevent These Issues

• Follow instructions: Always check the resin manufacturer’s ratio and mixing time recommendations.
• Precise measurement: Use digital scales to ensure accuracy for best curing results.
• Mix thoroughly: Scrape the sides and bottom of your cup to make sure everything is incorporated.
• Monitor your workspace: Aim for a dry, dust-free and temperature-stable area. Higher humidity can cause cloudiness, so work in controlled conditions if possible.
• Patience with demoulding: Wait the full recommended cure time before removing your piece from the mould. This reduces the risk of soft or sticky resin.

Beginners might find practical support helpful – our Resin Class – 3D Effects Coasters Masterclass covers correct resin preparation techniques step by step.

When This Matters Most

Achieving a hard, crystal-clear cure is vital for items like coasters, trays or decorative pieces. Imperfect finishes are especially noticeable in functional resin art that needs to withstand handling or display.