产品分类 · 68 个产品
密封胶
Polymers, crosslinkers, plasticizers, and adhesion promoters for silicone, MS-polymer, polyurethane, polysulfide, and acrylic sealant systems.
Sealants live in the joint — they must accommodate movement (thermal expansion, vibration, settlement) over decades while maintaining a watertight, airtight seal. The polymer chemistry that delivers this elastic-recovery performance differs sharply from coatings or adhesives: long polymer chains with controlled crosslink density, plasticizer choice that doesn't migrate, and adhesion-promoter packages that bond to glass, aluminum, and concrete without primer in most cases.
Coatingsink supplies the sealant raw-materials portfolio: silicone base polymers (RTV1, vinyl-terminated PDMS), MS-polymer (silyl-modified polyether) chemistry STP-E10/E30 grades, polysulfide LP2 and LP32 polymers, polyurethane prepolymers (IPDI-based and TDI-based), the acetoxy and alkoxy crosslinkers, tin and titanate catalysts, fumed silica reinforcement, and adhesion-promoter silanes (APS, vinyl, epoxy-functional) needed to formulate construction, automotive, and industrial sealants.
如何选择密封胶
买家在贸易和OEM配方中指定产品时使用的关键选择标准
Movement Capability
Class 25 sealant accommodates ±25% joint movement; Class 50 (modern silicone, MS-polymer) accommodates ±50%. Polysulfide and PU typically Class 25. Match sealant class to design joint movement (calculated from substrate thermal expansion + temperature range).
Substrate Adhesion
Silicone bonds to glass and clean metal but struggles on concrete and porous substrate without primer. MS-polymer adheres to most substrates without primer (its key advantage). PU and polysulfide need adhesion-promoter packages tuned to substrate.
Cure Mechanism
Acetoxy silicone (acid odor, fast cure, but corrodes metal) for residential glazing. Alkoxy silicone (neutral, slower, metal-safe) for industrial use. Hydroxyl-terminated silicone with tin catalyst for general purpose. MS-polymer cures via moisture activation. Polysulfide and PU are 2K systems.
Service Environment
Silicone for high-temperature (200 °C+ continuous) and UV-exposed joints. PU and polysulfide for trafficked horizontal joints (better abrasion). Acrylic for paintable interior caulks. Match polymer to environmental loads — UV, chemical, mechanical, temperature.
密封胶 应用场景
3 个应用场景指南
密封胶产品目录（68）
本分类所有化学品牌号 — 点击产品查看TDS、起订量及询价表单
ATH Flame Retardant Filler for Sealants ATH-80
Acetoxy Silicone Crosslinker SCA-100
Acoustical Non-Drying Sealant Compound AND-500
Acrylic Sealant Dispersion SAD-50
Alkoxy Silicone Crosslinker SCAL-50
Amino Silane Adhesion Promoter for Sealants APS-3
Antifungal Additive for Sanitary Silicone Sealants AFS-10
Bismuth Neodecanoate Catalyst BNC-18
Bituminous Emulsion Primer BE-50 (Waterborne)
Bituminous Primer for Waterproofing
Butyl Rubber Self-Sealing Tape Base BR-100
Butyl Rubber Solid IIR-268
Butyl Tape Sealant Base for IG Units BTB-200
Coated Calcium Carbonate for Sealants CC-2
Crystalline Waterproofing Additive CWA-100
DBTDL Tin Catalyst for Sealants
DIDP Plasticizer for PVC Sealants
DINP Plasticizer for Sealants
Dioctyl Phthalate (DOP) Plasticizer
EPDM Sealant Compound for HVAC and Roofing
Electrically Conductive Silicone Sealant ECS-50
Epoxy Silane Adhesion Promoter for Sealants ESS-187
Fumed Silica Reinforcing Filler for Silicone Sealants FSR-200
HMDI Aliphatic PU Sealant Prepolymer
High-MW Polyisobutylene PIB-1000
IPDI Sealant Prepolymer IPS-300
Intumescent Base for Fire-Stop Sealants IFS-300
Low-MW Polyisobutylene PIB-450
Low-Viscosity MS Polymer STP-E10
MDI-Based PU Sealant Prepolymer NC-8010
MOCA Chain Extender for PU Sealants
MS Polymer STP-E30 (Silyl-Terminated)
Methylhydrosiloxane Crosslinker for Addition Cure HCA-100
Molecular Sieve 3Å Desiccant Paste for Sealants
Neoprene Sealant and Gasket Compound NSG-50
Neutral-Cure Silicone Sealant Base NCS-100
Oxime Silicone Crosslinker SCOX-200
PU Joint Foam Sealant Prepolymer PJFS-80
PU Sealant Prepolymer NC-4035
Paintable Acrylic Caulk Dispersion PAC-50
Photocure Silicone Potting & Sealant PSP-100
Platinum Catalyst for Addition-Cure Silicone PTC-100
Polyether Polyol 2000 MW for Sealants
Polysulfide Curing Agent MnO2 Paste
Polysulfide Flexibilizer PF-50 for Epoxy
Polysulfide Hardener PH-50 (Lead-Free MnO2)
Polysulfide Polymer LP-32 (High MW)
Polysulfide Sealant Polymer LP-2
密封胶 常见问题
MS-polymer (silyl-modified polyether) gives PU-like elasticity with silicone-like UV stability and substrate adhesion — bonds to most substrates without primer, paintable, low odor, no isocyanate. PU sealants are stronger and more abrasion-resistant but need primer on glass and metal, and have isocyanate handling concerns. MS-polymer is becoming dominant for architectural and automotive sealing.