Silicone Mold Curing Agent Ratio & Troubleshooting: No Curing Issues
May 18,2026
Based on silicone manufacturers’ professional mold-making experience, the curing agent-to-silicone ratio should be adjusted per customer needs. For fast curing and demolding, add more curing agent—but the maximum ratio for condensation-type silicone must not exceed 5%, as excess causes unstable mold performance (poor toughness, cracking, shorter lifespan).
Within a reasonable range, more curing agent speeds up the reaction. However, thorough stirring is critical: uneven mixing leads to surface-first curing, with slower inner-layer curing (or complete failure), wasting materials and increasing costs.
Non-curing is common during silicone use and mold making. To troubleshoot, check these key points:
1.Ensure curing agent is added in the manufacturer’s precise ratio—insufficient amounts directly hinder curing.
2.Verify full stirring: even correct ratios cause local non-curing if mixed unevenly, harming mold performance.
3.Check temperature: below 0℃, no reaction occurs. 25℃ room temperature is optimal for stable curing.
4.For addition-type silicone, avoid contact with N/P/S/organotin chemicals (model materials, smoking, reagents)—these inactivate the catalyst, preventing curing.
Practical Solutions to Silicone Non-Curing Issues
To resolve non-curing: Operate at ~25℃, use a professional scale to add curing agent per manufacturer’s ratio, and stir fully for 3-5 minutes. For addition-type silicone, avoid cross-contamination—never use tools previously for condensation-type silicone (residues cause failure).
Following these guidelines avoids non-curing, reduces waste, boosts efficiency, and ensures high-quality, durable molds.
TAG:
Building H3, Shenye Zilinshan, Shengping Community, Longcheng Street, Longgang District, Shenzhen
Request Quote
