Regular sealants can't handle the heat, but PPG Aerospace® P/S 700 Black Spec Firewall Sealant from SkyGeek can. The high-temperature primerless firewall sealant has a service temperature range from -65 °F (-54 °C) to 400 °F (204 °C) and can easily withstand flash temperatures up to 2,000°F (1093°C). Designed for sealing firewall structures against the passage of air and vapors, PPG Aerospace P/S 700 Black Spec Firewall Sealant offers low sag and ease of application to make sure you get a complete, reliable seal.
PPG Aerospace® P/S 700 Black Spec Firewall Sealant is a two-part synthetic rubber compound designed to be mixed just before it is applied. Uncured, the sealant has a paste-like consistency that makes it suitable to apply by extrusion gun or spatula. PPG Aerospace® PS700 Sealant cures at room temperature and is resistant to common aircraft chemicals, offering a strong, long-lasting hold. PPG Aerospace® P/S 700 Black Spec Firewall Sealant bonds to virtually any aircraft substrate for flexible application.
| Application Properties (typical) | | | Color | Part A - Brown
Part B - Black
Mixed - Black | | Mixing ratio by weight | Part A: Part B
2.5:100 | | Base Viscosity | 12,000, (1200)
(Brookfield #6 @ 10rpm), Poise (Pa-s) | Application life and cure time
@ 77°F (25°C), 50% RH | | Application Life (hours) | Tack Free Time (hours) | Cure time to 30 A Durometer (hours) | | 2 | <4 | 48 | | |
| Performance Properties (typical) | | | Cure Time | 14 days @ 77°F (25°C), 50% RH | | Cured specific gravity | 1.36 | | Nonvolatile content,(%) | 70% | | Ultimate cure hardness (Durometer A) | 75 | | Peel strength, pli (N/25 mm),100% cohesion | | Dry, 14 days @ 77°F (25°C), 50% RH | Dry, 72 hours @ 400°F (204°C) | | QQ-A-250/4 (Aluminum) - 12 (53) | QQ-A-250/4 (Aluminum) - 15 (67) | | MIL-S-5059 (Stainless steel) - 12 (53) | MIL-S-5059 (Stainless steel) - 15 (67) | | | Thermal rupture resistance | Retains pressure of 5 psi with only negligible deformation, both before and after flame test @ 2000°F (1093°C). | | Low temperature flexibility @ -65°F (-54°C) | No cracking, checking or loss of adhesion. | | Corrosion resistance | No corrosion, adhesion loss, softening, or blistering after 20-day immersion in 3% salt water solution @ 140°F (60°C). | | Resistance to other fluids | Excellent resistance to water, alcohols, petroleum-base and synthetic lubricating oils. | | Flame resistance | No flame penetration after 15 minutes @ 2000°F (1093°C). | |
Note: The application and performance property values above are typical for the material, but not intended for use in specifications or for acceptance inspection criteria because of variations in testing methods, conditions and configurations.
Surface preparationImmediately before applying sealant to primed substrates, the surfaces should be cleaned with solvents. Contaminants such as dirt, grease, and/or processing lubricants must be removed prior to sealant application.
A progressive cleaning procedure should be employed using the appropriate solvents and new lint free cloth (reclaimed solvents or tissue paper should not be used). Always pour solvent on the cloth to avoid contaminating the solvent supply. Wash one small area at a time.
It is important that the surface is dried with a second clean cloth prior to the solvent evaporating to prevent the redeposition of contaminants on the substrate.
Substrate composition can vary greatly. This can affect sealant adhesion. It is recommended that adhesion characteristics to a specific substrate be determined prior to application on production parts or assemblies.
For a more thorough discussion of proper surface preparation, please consult the SAE Aerospace Information Report AIR 4069. This document is available through SAE, 400 Commonwealth Avenue, Warrendale, PA 15096-0001.
Mixing instructions
P/S 700 is supplied in a two-part kit. Mix according to the ratios indicated in the application properties section. Mix Part A and Part B separately to uniformity, then thoroughly mix entire contents of both parts of the kit together taking care to avoid leaving unmixed areas around the sides or bottom of the mixing container.
Storage life
The storage life of P/S 700 is at least 12 months when stored at temperatures below 80°F (27°C) in original unopened containers.
Health precautions
This product is safe to use and apply when recommended precautions are followed. Before using this product, read and understand the Material Safety Data Sheet (MSDS), which provides information on health, physical and environmental hazards, handling precautions and first aid recommendations. An MSDS is available on request. Avoid overexposure. Obtain medical care in case of extreme overexposure.
For industrial use only. Keep away from children.
For emergency medical information call 1-800-228-5635.
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