As of September 24, 2020, we have fresh material and are shipping domestically and internationally.


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

CS3213 Class A and B and C

CS3213: Corrosion Inhibitive Sealant

CS3213 from Flamemaster is a corrosion inhibitive sealant intended for use on integral fuel tans and pressurized cabins as well as other areas subject to contact with aircraft fuels, lubricants, oils, water and/or weathering.

At room temperature, this two-part polysulfide cures to a flexible, resilient rubber. Learn more below or get a quote today.

Meets requirements of specification:   MIL-PRF-81733 & Lockheed STM-40-111

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: A-¼A-½
  • Application Life (hrs): ¼½
  • Tack Free Time (hrs): 815
  • Cure Time (hrs): 1630
Shelf Life: 9 months | Consistency: Self Leveling | Color: Gray

Technical Data:  *
  • Cure Profile: B-¼B-½
  • Application Life (hrs): ¼ ½
  • Tack Free Time (hrs):  68
  • Cure Time (hrs): 1630
Shelf Life: 9 months | Consistency: Paste | Color: Gray

Technical Data:  *
  • Cure Profile: C-20
  • Application Life (hrs):
  • Tack Free Time (hrs): 48
  • Cure Time (hrs): 96
Shelf Life: 9 Months | Consistency: Rollable | Color: 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.

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