NSL 870 Corrosion Inhibitive Sealant

FAA Approved PMA Replacement Sealant for P/S 870 Class B

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 P/S 870 sealant. At room temperature, this two-part polysulfide base compound cures to a flexible, resilient rubber.

Learn more below or get a quote today.


  • P/S 870 Class B
  • 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
Cure Profile:
  • Application Life (hrs):
  • Tack Free Time (hrs):
  • Cure Time (hrs):
  • B-½
  • ½
  • 5-6
  • 24
Cure Profile:
  • Application Life (hrs):
  • Tack Free Time (hrs):
  • Cure Time (hrs):
  • B-2
  • 2
  • 5-6
  • 48
Shelf Life: 9 months | Consistency: Paste | Color: Gray

Available in:

  • 2½ oz. cartridges
  • 6 oz. cartridges
  • pint kits
  • quart kits
  • gallon kits

Also available in premixed and frozen cartridges. Other-size packaging available upon request.

All of our pricing is custom to your needs and can vary based on a number of factors including:

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

Please request a quote and we will be in touch as soon as possible.

Competitive Advantage


No Order Minimum*

Custom packaging and custom quantities with no minimums on orders.*


Speed of Delivery

Short lead times, just-in-time turnarounds, and no expedite fee.


International Service

Help with shipping logistics, regulations and documentation requirements.


Continued Support

Supporting our customers is our most important value as a company and as people.

*There are a small number of products that have mandated minimums by the manufacturer.

NSL PMA Sealant Benefits

  • 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)

For more information about PMA Sealants view our guide.

Request a Quote

To inquire about this product get in touch with our sales staff. We will return your message promptly.