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

CS5306 Class B

CS5306: Polythioether Fast Cure Sealant

CS5306 from Flamemaster is a polythioether fast cure sealant intended for use when sealing on aircraft to yield weather tightness and fuel resistant seals.

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

Meets Requirements: AMS-3277 Type I formerly MIL-S-29574 Type I

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

Technical Data

Cure Profile:B1/4B1/2B2
Application Life (hrs):1/41/22
Tack Free Time (hrs):1/21<12
Cure Time (hrs):12<16

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.

CS5306 Fast Cure Polythioether Fuel Tank & Fuselage Sealant

Product Resources

Technical Data Sheets (TDS)

Safety Data Sheets (SDS)

NSL Product Guides