Syensqo BR 127

Source Syensqo BR® 127 directly from Composites One

Every decision we make at Composites One is designed to empower our customers—through responsive service, proactive solutions, and reliable access to the materials they depend on. That commitment extends to our role as an authorized stocking distributor of Syensqo BR 127, a corrosion inhibiting primer widely used in aerospace composites manufacturing and critical aviation bonding applications.

With deep expertise in handling time and temperature-sensitive materials like BR 127, Composites One offers the technical support, freezer capacity, and logistical strength needed to ensure product integrity and on-time delivery. We act as an extension of your team—focused on your success today and into the future. Let’s transform your supply chain into a strategic advantage. Discover the difference of working with Composites One—a customer-focused leader in advanced material distribution for aerospace manufacturing.

BR 127 AEROSPACE PRIMER

BR 127 corrosion inhibiting primer is a modified epoxy primer. It is the industry standard for high-performance corrosion inhibiting primers and has been used in virtually every commercial aircraft built since its introduction.

BR 127 primer can be used with essentially all 250°F (121°C) film adhesives and has been designed to provide optimal structural performance at temperatures ranging from -67°F to 300°F (-55°C to 149°C). BR 127 primer is formulated to provide maximum environmental resistance and durability within the bond line, as well as prevent corrosive undercutting. It can also be used effectively as a protective coating outside bonded areas.

BR 127 corrosion inhibiting primer can be cured prior to bonding. Recommended cure cycles range from 4 hours at 180°F (82°C) to 30 minutes at 250°F (121°C).

Primed details should be wrapped in Kraft paper (as protection from dust and dirt) and stored prior to adhesive bonding. Maintaining controlled conditions of 90°F (32°C) maximum temperature and 70% maximum humidity is recommended for extended storage life.

Cure cycles for adhesive films primed with BR 127 primer may vary from 200°F to 350°F (93°C to 177°C) with minimum pressures to assure proper mating of bonded details.

BR 127 primer meets BMS5-89 and MIL-A-25463 specifications.

FEATURES & BENEFITS

  • Industry-wide standard for corrosion resistant primers

  • Prevents hydrolysis of oxide layers

  • Structural performance from -67°F to 300°F
    (-55°C to 149°C)

  • Compatible with a wide variety of adhesive systems

  • Improves hydrolytic stability at the adhesive-to-metal interface

  • Protects prepared surfaces from further oxidation

  • Recommended use with FM ® 73, FM ® 87, FM ® 94, BR ® 95, FM ® 123-2, FM ® 123-5, FM ® 300, FM ® 300-1, or FM ® 300-2

All product information per Syensqo BR 127 Technical Data Sheet.

STOCKED SPECS

  • BMS5-89 TYPE 1, GRADE A

  • LCM 30-1222 REV C

  • HMS 20-2128 CL 2 FORM 1

  • SCGMS 56033 Rev D CI 1&2

  • MIL-A-25463 Rev B Type 1 CI 2, Group 3

  • MMM-A-132 Rev B Type 1 CI 2 Form F Group 3 

  • MAP-CC10589 Rev G Lockheed Spec

  • 2308405 REVISION G (LM-CC10589A)

  • C182630 REV B (C182630-1

  • Cytec Spec

  • PCS 5601 REVISION A

  • PS 21330 REVISION AU MMS 350 TYPE III

  • 13304463 Parker Meggitt

  • Please inquire about additional stocked specs.

Syensqo’s BR 127 is a premium, corrosion-inhibiting modified epoxy primer widely regarded as the aerospace industry standard.

BR 127 offers outstanding structural durability and environmental resistance, performing reliably over a broad temperature range from –67 °F to 300 °F (–55 °C to 149 °C). This aerospace epoxy primer enhances bond-line integrity by preventing hydrolysis of oxide layers, stopping corrosive undercutting, and improving hydrolytic stability at the interface between adhesive and substrate. Its compatibility with nearly all 250°F film adhesives and application flexibility—usable both within bonded areas and as a standalone protective coating—make it ideal for critical aerospace structures.

Beyond its protective performance, BR 127 epoxy primer is available in both conventional solvent-based and water-based (non-chromate) formulations, including an electrically conductive variant (BR 127 NC ESD) that incorporates carbon black for enhanced conductivity. It is designed for efficient application by spraying or rolling and integrates seamlessly into automated aerospace manufacturing processes. Its proven track record, used in virtually every commercial aircraft since its launch, ensures reliability and OEM compatibility, simplifying procurement, qualification, and compliance for aerospace manufacturers.

Composites One is an authorized Syensqo distributor offering BR 127 primer and composites materials meeting stringent aerospace specifications. BR 127 primer meets both BMS5-89 and MIL-A-25463 specifications.