3M K520 Adhesion Promoter for PP/EPDM Substrates with Acrylic Foam Tapes
Basic Properties
3M K520 is a transparent yellow adhesion promoter containing synthetic resin with toluene/isopropyl alcohol solvents and ~3% solids. It enhances bonding of acrylic foam tapes to polypropylene (PP) and EPDM substrates, especially in low-temperature winter conditions.
Product Description
K520 chemically modifies substrate surfaces to dramatically improve peel strength. It increases PP bond strength by 7x (4.9N/25mm→34.1N/25mm) and maintains >20N/25mm after 80°C heat/ humidity aging.
Characteristics
| Property |
Value |
Test Condition |
| PP Initial Peel Strength |
34.1 N/25mm |
23°C, 20 min cure |
| PP High-Temp Strength |
21.6 N/25mm |
80°C after conditioning |
| EPDM Initial Strength |
39.2 N/25mm |
23°C, 20 min cure |
| Drying Time |
30 sec - 24 hr (3 min recommended) |
23°C, 65% RH |
| Solvent Content |
Toluene/IPA blend |
SDS Section 3 |
Application Scenarios
Automotive Bumper Assembly: Enhances VHB™ tape bonding between PP bumpers and metal frames. Validated for -20°C performance, implemented in Toyota TNGA platform.
Building Sealant Bonding: Secures EPDM gaskets to aluminum profiles. Withstands 40°C water immersion for 336 hrs (41.2N/25mm), compliant with curtain wall standards.
Outdoor Equipment: Bonds PP solar mounts to EPDM roofing. Passes 95% RH aging (7-day strength >22.5N/25mm), applied in solar installations.
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
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