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Flamemaster has been consistently producing quality sealants for the aerospace industry since 1942.


CS1900: Firewall Sealant

CS1900 from Flamemaster is a firewall sealant intended for use sealing firewall structures. Elastomeric at operating temperatures, it can withstand flash temperatures of 2000 deg F. Learn more below or get a quote from NSL Aerospace today.

Meets requirements of specification:  MIL-S-38249 Ty1

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:
  • Application Life (hrs):
  • Tack Free Time (hrs): N/A
  • Cure Time (hrs): 72
Shelf Life: 6 Months | Consistency: Paste | Color: Black

*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.

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Technical Data Sheets (TDS)

Safety Data Sheet (SDS)

NSL Product Guides