NSL PMA Sealant

FAA approved replacements for PRC/PPG Aerospace Sealants.

NSL870 Class B

NSL870: Corrosion Inhibitive Aviation Sealant

NSL870 is a corrosion inhibitive aviation sealant intended for use on integral fuel tanks and pressurized cabins as well as other areas subject to contact with aircraft fuels, lubricants, oils, water and/or weathering. This is an FAA-approved PMA replacement for PPG’s PS-870 sealant. Learn more below or get a quote today.

At room temperature, this two-part polysulfide base compound cures to a flexible, resilient rubber.

Replacement For: P/S 870 Class B
Conforms To:
MIL-PRF-81733 by FAA-PMA Approval

Eligible manufacturers for NSL870 series per FAA PMA Supplement PQ4210CE* include:
Airbus, Boeing, Bombardier, Embraer, McDonnell Douglas, Rolls Royce.

See the complete list of NSL870 eligible makes and models or click the supplement numbers below to access the FAA PMA supplement:
NSL870B1/2: Sup. 2, Sup. 5
NSL870B2: Sup. 2, Sup. 3, Sup. 5
NSL870B4: Sup. 2

Packaging: Available in 2½ - and 6-oz. cartridges, pint, quart and gallon kits. Also available in premixed and frozen cartridges. Other-size packaging available upon request.

Technical Data

Cure Profile:B1/2B2B4
Application Life (hrs):1/224
Tack Free Time (hrs):5 – 65 – 612 – 14
Cure Time (hrs):244872

Shelf Life: 9 monthsConsistency: PasteColor: Gray

*Please consult the technical data sheet for specificities of environmental conditions that yielded the above data. Standard cure rates are based on industry curing standards.


Why don’t we have pricing on our product page? Because pricing is not a one-size-fits-all proposition. There are multiple variables determining product price, such as:

  • Part name, type, class, or manufacturer
  • Size
  • Quantity
  • Specification
  • Shelf life requirement
  • Purchaser type: Distributor or end-user?

Every quote is custom, created just for you and your specific needs. Please fill out the form on our CONTACT US page and we’ll be in touch ASAP.

NSL870 Class B - PMA Replacement for P_S870 Cl

NSL PMA Sealants

  • Non-critical Part (FAA AC 43-18 (2))
  • FAA Approved (Supplement PQ4210CE)
  • 8130 Airworthiness Approval
  • PPG/PRC replacement
  • 30%-50% cost savings on average
  • Faster turnaround
  • Customizable packaging
  • Available pre-mixed and frozen (PMF)

Product Resources

Technical Data Sheets (TDS)

Safety Data Sheets (SDS)

NSL Product Guides