PPG PR-2225 Class B is a high temperature, electrically conductive, corrosion inhibitive sealant. Service temperature is −54 to 149 °C, with intermittent excursions up to 204 °C. It provides excellent electrical conductivity and EMI/RFI shielding and is an effective barrier against corrosion on aluminium alloys and between dissimilar metals. It is a two-part, nickel filled, condensation cured silicone, a low sag, thixotropic paste applied by extrusion gun or spatula, and is compatible with polysulfide sealants.
Application Properties (B-1)
- Colour: A white, B olive, mixed olive; mix ratio by weight 4:100
- Base viscosity 15,000 P (1500 Pa·s)
- Application life 1 hour; tack free under 4 hours; 40 Shore A in 24 hours
Performance
- Specific gravity 2.20; hardness 68 Shore A
- Tensile strength 1517 kPa (220 psi); 1344 kPa after 30 minutes at 252 °C
- Contact resistance 0.04 ohm; volume resistivity 0.10 ohm·cm
- No corrosion or change in conductivity after 2000 hours salt spray; no cracking at −54 °C
Storage
- At least 6 months below 27 °C in unopened containers; can kits and Semkit cartridges
| Packing | 6 OZ |