NSL PMA Sealant

FAA approved replacements for PRC/PPG Aerospace Sealants.

NSL1776M Class B

NSL1776M: Lightweight Aviation Fuel Tank and Fuselage Sealant

NSL1776M is a lightweight aviation sealant for use on fuel tanks and aircraft fuselage 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 PR-1776 sealant that cures at least 50% faster. Learn more below or get a quote today.

Replacement For: PR1776M Class B
Conforms To: AMS3281 by FAA-PMA Approval

Eligible manufacturers for NSL1776M series per FAA PMA Supplement PQ4210CE include:
ATR, Boeing, Bombardier, Cessna, Embraer.

See the complete list of NSL1776M eligible makes and models or click the part number to access the FAA PMA supplement:
NSL1776MB1/2: Sup. 2, Sup. 4, Sup. 5
NSL1776MB2: Sup. 2, Sup. 4, Sup. 5

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:B1/2B2
Application Life (hrs):1/22
Tack Free Time (hrs):<4<6
Cure Time (hrs):<6<9

Shelf Life: 12 monthsConsistency: PasteColor: Dark 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.

NSL1776M Class B - PMA Replacement for PR-1776

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