LOCTITE 518 Medium Strength Anaerobic Flange Sealant
Basic Properties
LOCTITE 518 is a one-component red gel-like acrylic sealant (dimethacrylate ester) with thixotropy and UV fluorescence. It cures anaerobically when confined between metal surfaces, provides immediate low-pressure sealing, fills gaps up to 0.25mm, and tolerates minor contamination from cutting/lubrication oils.
Core Characteristics
It bonds to both active (e.g. grit-blasted steel) and passive substrates (low-copper aluminum), forming a medium-strength seal. Key advantages include instant pressure resistance (1.35 MPa @ 0.05mm gap) and reliable curing with surfactant-containing cleaner residues.
Key Performance Data
Typical mechanical properties after 24h cure @23°C:
| Property |
Test Method |
Value |
Substrate |
| Tensile Strength |
ISO 527-2 |
7.3 N/mm² (1,060 psi) |
- |
| Lap Shear Strength |
ISO 4587 |
8.4 N/mm² (1,220 psi) |
Grit-blasted mild steel |
| Tensile Strength |
ISO 6922 |
13 N/mm² (1,930 psi) |
Aluminum pins |
| Elongation at Break |
ISO 527-2 |
64% |
- |
Chemical Resistance:
| Environment |
Temp (°C) |
Strength Retention (5000h) |
| Synthetic Motor Oil |
150 |
50% |
| Unleaded Gasoline |
23 |
5% |
| ATF Fluid |
150 |
40% |
Application Scenarios
Designed for rigid metal flange sealing in:
Automotive: Gearbox casings, engine block flanges
Industrial: Hydraulic flanges, compressor covers, gearbox joints
FAQ
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
Your message must be between 20-3,000 characters!
