Shenzhen Huazhisheng New Material Technology Co., Ltd.
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DOWSIL™ 737 Sealant: High-Performance One-Part Silicone For Industrial Applications
DOW's DOWSIL™ 737 is a primerless, one-part neutral cure silicone sealant compliant with ASTM C920. It features rapid room-temperature curing (3-6 min skin time), extreme temperature resilience (-65℃ to 177℃), UV stability, and permanent elasticity from 100% silicone rubber formulation.
The oxime cure mechanism activates upon airborne moisture exposure to form flexible seals. Key advantages: direct adhesion to 20+ substrates (e.g. ABS, anodized Al, SS) without primers; zero slump/sag; rain resistance after 14-min tack-free time; handling strength in 24hrs. Limitations: Not FDA-approved for food contact; may discolor brass/copper and stress-craze polycarbonate in confined spaces.
| Property (ASTM/CTM) | Unit | Value |
|---|---|---|
| Rheology | ||
| Flow/Sag (CTM0062) | inches | Nil (0) |
| Extrusion Rate (1/8" orifice) | g/min | 395 |
| Cure Profile | ||
| Skin-over Time (CTM0098) | min | 3-6 |
| Tack-free Time | min | 14 |
| Mechanical Properties | ||
| Hardness (Shore A, CTM0099) | points | 33 |
| Tensile Strength (CTM0137A) | MPa | >1.2 (>175 psi) |
| Elongation (CTM0137A) | % | >300 |
| Peel Strength (CTM0293) | N/mm | 3.5 (20 ppi) |
| Electrical Performance | ||
| Dielectric Strength | V/mm | 13.5 (344 V/mil) |
| Table: Typical properties per technical datasheet (cured 7 days @25°C/50% RH) |
Industrial Assembly: Replaces fasteners in appliances (refrigerator/freezer liners); automotive lamp sealing (VW TL 52006 certified).
Electronics: Waterproofing coaxial connectors (IP68), protecting instrumentation from condensation.
Construction: Bonding plastic moldings to substrates, outdoor display sealing (>10y weatherability per industry reports).
1. Who are we?
We are Shenzhen Huazhisheng New Material Technology Co., Ltd., a professional industrial adhesives and sealants supplier based in China since 2018. we serve global markets: Mainland China (60%), Southeast Asia (20%), North America (10%), and Europe (10%).
2. What products do you offer?
we supply high-performance adhesives and sealants from global leaders including:
Cemedine, Dow Corning, Shin-Etsu, Araldite, and Momentive,etc.
3. How do you guarantee product quality?
Quality assurance through:
Mandatory pre-production samples approval
Final inspection by QC team before shipment
International certifications: SGS, UL, FDA, RoHS, REACH
4. Why choose us over other suppliers?
Reliable Supply:Authentic products from top manufacturers
Expert Support:Technical guidance for product selection
Global Compliance:Certifications meeting target market standards
Efficient Service:Customized solutions & professional support
5. What services do you provide?
Delivery:EXW/FOB/CIF
Payment:USD/EUR/CNY/HKD via T/T, L/C
Support:Technical consultation & logistics coordination
