Silicone Sealants
Silicone sealants are RTV (room-temperature vulcanizing) one- or two-component systems that cure to form durable elastomeric seals with weatherability from -50 °C to 200 °C. Construction (structural and weatherproofing glazing), industrial assembly, and electronics potting are the largest markets.
Key Properties at a Glance
| Cure System | Acetoxy (acid), Oxime, Alkoxy (neutral), Amine |
|---|---|
| Service Temperature | -50 °C to 200 °C |
| Tack-Free Time | 10 – 60 min @ 23 °C, 50% RH |
| Cure Depth (24h) | 2 – 4 mm |
| Movement Capability | ±25% (structural) to ±50% (premium weatherseal) |
| Standards | GB 16776 (structural) / GB/T 14683 (construction) / ASTM C920 / ISO 11600 |
Range shown is category-wide; refer to individual grade COA for precise specs.
Products & Grades/ 2
Acetoxy-Cure Silicone Sealant (Acid Cure)
Acetoxy-cure silicone sealants release acetic acid (vinegar smell) during cure. The fastest, lowest-cost RTV-1 chemistry — ideal for plumbing fixtures, bathtubs, sanitary ware, and DIY general-purpose sealing. Not suitable for stone, marble, mirrors, or copper/brass (causes corrosion).
Neutral Alkoxy-Cure Silicone Sealant
Neutral alkoxy-cure silicone sealants release alcohol (methanol or ethanol) during cure — non-corrosive, suitable for stone, marble, copper, and aluminum substrates. The dominant chemistry for premium construction sealants and structural glazing. Standards: GB 16776, ASTM C920 Class 50.