INSULCAST RTVS A-4000
Harmonization Code : 3208.20.90 | Paints and varnishes that are dispersed or dissolved in a non aqueous medium
Main features
- Two-Component Solvent-Based Silicone Adhesive for Silicones
- 900 to 2,500 cP Mixed Viscosity
- 73 to 260 deg C Service Range
Product Description
INSULCAST® RTVS A-4000 Silicone Adhesive is a two-component, solvent-based silicone resin adhesive for bonding silicones, Mylar, metals, and selected engineering plastics. The light-straw Part A and clear Part B are mixed at 100:3.3 by weight to produce a typical mixed viscosity of 900 to 2,500 cP. The adhesive is documented for lap-shear and peel performance at elevated temperature and retains flexibility from -73°C to 260°C. It may cure for one to four days at room temperature or be accelerated with an eight-hour cure at 200°C.
Key features
- Elevated-temperature bonding: The adhesive retains flexibility from -73°C to 260°C.
- Silicone and film adhesion: Documented substrates include silicones, Mylar, metals, and engineering plastics.
- Low mixed viscosity: Typical mixed viscosity is 900 to 2,500 cP.
Applications / Suitable for
- Bonding silicone materials
- Bonding Mylar and metal assemblies
- High-temperature engineering-plastic bonding
TDS, SDS & Technical Documents
Technical Specifications
No specifications available.
Additional Information
As-supplied / before-processing properties
Typical as-supplied or processing-state values unless otherwise stated. These values are not sales specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Part A color | Light straw | N/A | As supplied |
| Part B color | Clear | N/A | As supplied |
| Part A viscosity | 1,000 to 5,000 | cP | At 25°C |
| Part B viscosity | 50 | cP | At 25°C |
| Mix ratio | 100:3.3 | parts by weight | Part A : Part B |
| Mixed viscosity | 900 to 2,500 | cP | Typical |
| Pot life | 24 | min | At 25°C |
| Solids content | 55 | % | Part A |
After-processing / final-state properties
Typical cured or final-state values under the stated system and test conditions. These values are not sales specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Service temperature | -73 to 260 | °C | Documented range |
| 180° peel strength | 36 | oz/in | Mylar-to-Mylar |
| Lap shear strength | 130 | psi | Mylar-to-Mylar at 25°C |
| Lap shear strength | 120 | psi | Silicone-to-aluminum at 25°C |
| Dielectric strength | 450 | V/mil | ASTM D149 |
| Room-temperature cure | 1 to 4 | days | Documented schedule |
| Accelerated cure | 8 | h | At 200°C |
