DOWSIL Q3-6611
Harmonization Code : 3208.20.90 | Paints and varnishes that are dispersed or dissolved in a non aqueous medium
Main features
- Self-Leveling Flowable Dispensing
- Temperature-Controlled Rapid Cure
- High Tensile Strength
Product Description
DOWSIL™ Q3-6611 Adhesive is a one-part, heat-curing silicone adhesive formulated for electronic and automotive assembly applications requiring flowability, adhesion, and mechanical durability. The material is designed to flow, fill, and self-level after dispensing, enabling efficient sealing, gasketing, and component attachment processes. With no mixing required and cure speed controlled by temperature, DOWSIL™ Q3-6611 supports flexible manufacturing operations. The cured adhesive provides high tensile strength, unprimed adhesion to aluminum, and reliable performance across a broad operating temperature range, making it suitable for demanding assemblies including engine controllers, ABS modules, transmission controllers, connectors, and lighting systems.
Key features
- One-part heat-cure silicone: Eliminates mixing requirements while allowing cure speed to be adjusted through processing temperature.
- Flowable, self-leveling behavior: Flows and fills after dispensing to support sealing, gasketing, and component attachment applications.
- High-strength adhesion: Delivers approximately 850 psi lap shear adhesion to aluminum after cure.
Applications / Suitable for
- Sealing lids and housings
- Attaching baseplates
- Gasketing applications
- Connector sealing
- Engine controller assemblies
- ABS and transmission controller assemblies
- Automotive and industrial lighting assemblies
Technical Specifications
General Properties
Physical Properties
Additional Information
As-supplied / before-processing properties
Typical as-supplied properties for the black grade prior to cure. Values are typical data and not specifications.
| Property | Q3-6611 (Black) | Q3-6611 (Gray) | Unit | Method / condition |
|---|---|---|---|---|
| Viscosity | 92.4 | 87 | Pa·s | Typical value |
| Heat cure time | 180 | - | minutes | 100°C |
| Heat cure time | 60 | 60 | minutes | 125°C |
| Heat cure time | 30 | 30 | minutes | 150°C |
| Shelf life | 12 | 12 | months | Stored at 5°C |
After-processing / final-state properties
Typical cured properties for the black grade. Values are typical data and not specifications.
| Property | Q3-6611 (Black) | Q3-6611 (Gray) | Unit | Method / condition |
|---|---|---|---|---|
| Specific gravity | 1.32 | 1.31 | - | Cured |
| Durometer hardness | 60 | 59 | Shore A | Typical value |
| Lap shear adhesion to aluminum | 850 | 880 | psi | Unprimed adhesion |
| Hardening transition by DSC | -46 | - | °C | DSC measurement |
| Linear CTE | - | 250 | ppm/°C | TMA |
| Recommended operating range | -45 to 200 | -45 to 200 | °C | Long-term operation |
