OEM Silicone Sealants & Adhesives from China
1 resources tagged with "Adhesives Sealants"
Silicone sealants from China come in two main cure chemistries — neutral cure (alcohol/oxime, non-corrosive, safe on metals and electronics) and acetoxy cure (acetic acid, faster but corrodes some substrates) — and reputable formulations meet ISO 11600 or ASTM C920. The sourcing detail that matters is matching cure type to substrate: acetoxy on bare copper or sensitive electronics is a corrosion problem waiting to happen. Watch for sealants that pass an initial bond test but fail UV or thermal-cycle aging, which is where cheap formulations come apart.
When you source sealant, the pitfall is the wrong cure chemistry for the substrate and formulations that don't hold up under weathering. We confirm the cure type, the ISO 11600 / ASTM C920 claim, and aging behavior for the intended use.
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FAQ
Neutral or acetoxy cure — which do I need?
Neutral cure is non-corrosive and safe on metals, glass, and electronics; acetoxy cures faster and bonds well but its acetic acid byproduct corrodes copper and some metals. Match cure type to your substrate.
What standards apply to silicone sealant?
ISO 11600 (joint sealants) and ASTM C920 (elastomeric sealants) are the common references. Ask for a test report confirming the grade rather than accepting the claim on the datasheet alone.
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