PPG PS890B-1/2 (100-ml-Semkit)

Additional Product Information

The PPG PS890B-1/2 is trusted by MRO teams and aircraft engineers worldwide because it delivers reliable, fuel-resistant sealing essential to the safety of both military aircraft and commercial fleets carrying millions of passengers each year. Its proven performance in sealing integral fuel tanks and critical fuselage joints makes it a must-have for minimizing downtime in both scheduled maintenance and urgent AOG situations. Packaged in a ready-to-use Semkit, it ensures consistent mixing, easy application and reduced waste, making it a practical and efficient solution. That’s why the aviation industry continues to rely on PS890B-1/2 as the benchmark for high-performance aerospace sealants.

Key Technical Specs for PPG PS890B-1/2

• Type / chemistry: Two-part, manganese-dioxide cured polysulfide (polysulfide fuel-tank sealant).
• Packaging: 100 ml (3.38 fl oz) Semkit cartridge, intended for small/precision repairs and AOG response.
• Service temperature: roughly −65 °F to +250 °F (−54 °C to +121 °C); intermittent excursions cited up to ≈ +275 °F (≈135 °C) in supplier literature.
• Physical / mechanical: elastomeric after cure, maintains flexibility and adhesion after prolonged fuel immersion; typical cured durometer ~A49 (lab cure), tensile strength and elongation detailed on TDS.
• Mix ratio: typical Part A : Part B mix ratios shown in TDS (example industry ratios ~10:100 by weight for similar products) - follow the Semkit instructions exactly.
• Load-bearing: NOT a structural or load-bearing material - intended for sealing and fuel containment only.
• Shelf life / storage: Semkit form typically ~9 months (≈270 days) when stored per manufacturer instructions (cool, dry).
• Hazard / shipping: commonly shipped under UN3082, Hazard Class 9, Packing Group III (check vendor paperwork per shipment).

Approvals & Specifications for PPG PS890B-1/2

• Manufacturer: PPG Aerospace (PRC / PPG product family).
• Common spec ID: P/S 890 Class B (PS890B) - often referenced as the PRC/PPG sealant family.
• Associated industry spec: AMS-S-8802 references/tests apply for PS890 family (check TDS for Type/Class mapping).
• OEM approvals: Widely used and accepted in OEM maintenance practice for fuel-tank sealing, but specific Boeing/Airbus/Lockheed part-level approvals are not always printed on the TDS - procurement should request a Certificate of Conformance (C of C) and any required OEM acceptance paperwork for installation on a given platform.
• Regulatory / safety docs: Part A and Part B SDS (Safety Data Sheets) and the TDS (Technical Data Sheet) are published by PPG and available as PDFs; these are the authoritative documents for safety and performance.

Typical Aircraft MRO / AOG Applications for PPG PS890B-1/2

• Used for sealing integral fuel tanks, access door interfaces and fuselage joints that are exposed to fuel or condensate.
• The Semkit size makes PS890B-1/2 ideal for immediate AOG repairs and smaller maintenance tasks where bulk kits would be wasteful.
• Keeping it in AOG kits prevents groundings for fuel-seal faults and allows rapid restoration of fuel-tight integrity until depot work is scheduled.

Compatibility & Safety Notes for PPG PS890B-1/2

• Substrate compatibility: Metals and common aircraft composites - surface prep per TDS is critical (clean, dry, solvent wipe).
• Seal compatibility: If mating to elastomeric seals, verify compatibility; polysulfides are generally compatible but confirm for specific seal compounds.
• Application: Semkit ensures pre-measured Part A/B and consistent mix when used per the Semkit applicator instructions. Correct mixing and tooling (no air entrapment) are essential.
• Curing: Ambient cure; cure rate depends on temperature/humidity. Field cure slower in cold conditions - plan for AOG timelines accordingly.
• Safety: Use PPE, adequate ventilation. Follow SDS for handling, spill, fire and disposal instructions. Store sealed cartridges per manufacturer temperature recommendations.
• Flammability / interior use: This is a fuel-tank sealant - check flammability/installation rules before using in non-fuel interior locations.

Packaging & Procurement for PPG PS890B-1/2 (matched to the Aerospheres page and common market packs)

• Pack offered on Aerospheres: 100 ml (3.38 fl oz) Semkit - individual cartridges with lot number and label. Aerospheres lists shelf life and expiry tracking on the product page.
• Typical order info to include: Manufacturer part number (PS890B1/2-1001 or PPG reference), Aerospheres SKU/part number, batch/lot, manufacture date, remaining shelf life, request TDS & SDS, request C of C and any required OEM acceptance documents.
• Storage: Rotate stock FIFO; temperature-controlled storage recommended to preserve shelf life.

Why PPG PS890B-1/2 is Chosen for AOG / MRO

• Rapid field response: Semkit form and room-temperature cure let ground crew apply repairs quickly on-site.
• Fuel resistance: Maintains seal integrity after prolonged contact with jet fuel/avgas - critical for fuel-tank airworthiness.
• Precision & reduced waste: 100 ml Semkits are cost-effective for small repairs vs bulk kits.
• Proven track record: Industry-standard polysulfide family used across many fleets - technicians know the product and application method.

Practical Suggestions for Your Team (AOG mindset) for PPG PS890B-1/2

• Keep several 100 ml Semkits in each AOG response kit for common fuel-tank access/patch jobs.
• Train ground crew on Semkit mixing/application, surface prep and tooling (no-air fillets).
• Carry solvent wipes (isopropyl), mixing applicator guns and finishing tools in the kit.
• For cold climates, plan for slower cure: have heated staging or temporary shelter to accelerate cure if mission time critical.
• Always capture batch/lot and application records for traceability and quality sign-off.

Manufacture / Aviation Spec Codes for PPG PS890B-1/2

• PPG / PRC family designation: P/S 890 Class B (PS890B).
• Associated industry test/spec reference: AMS-S-8802 (apply Type/Class mapping from TDS).
• OEM approvals: Request C of C and platform acceptance from PPG or supplier for Boeing/ Airbus / Lockheed Martin if your maintenance procedure requires explicit OEM listing. Many MROs accept PS890 family via OEM maintenance documentation or supplier approval - verify per aircraft program.

Alternative Names & Descriptions for PPG PS890B-1/2

• PPG PS890B-1/2 Semkit
• PS 890 B-1/2 Fuel Tank Sealant
• Pro-Seal 890 B Semkit
• PS890 Semkit 100 ml
• Rapid Cure Polysulfide Fuel Tank Sealant (100 ml Semkit)
• ps890b1 2
• PROSEAL 890
• PS890B-1/2
• ps890b1 2sk654 83574
• PS890 B1/2 SK654
• PS-890/B