SikaBiresin CR
77
FR
1 /
2
PRODUCT DATA SHEET
SikaBiresin CR77 FR
Version 01.01 (09 – 2024), en_US
PRODUCT DATA SHEET
SikaBiresin CR77 FR (Formerly EL-319)
Flame Retardant, Epoxy Laminating System
TYPICAL PHYSICAL PROPERTIES (FOR FURTHER VALUES SEE SAFETY DATA SHEET)
DESCRIPTION
SikaBiresin
CR77 FR is a UV stabilized,
halogen-free, flame retardant epoxy
laminating system. It is designed for use
in fabricating parts or for repairs on
structures which require flame
retardant and self-extinguishing
properties. SikaBiresin CR77 FR offers
both room temperature and post curing
capabilities.
PRODUCT BENEFITS
– Meets FAR 25.853 flame testing for aircraft
interiors and other areas where flame
retardant properties are required
– Non-halogen flame retardancy
– Self-extinguishing
– Epoxy (non- styrene)
– Excellent bond to all fabrics
AREAS OF APPLICATION
SikaBiresin CR77 FR is suitable for vacuum bag ged,
open molding, or resin transfer molding
applications. Areas of application include
aerospace, transportation, architectural, and
others.
Tests with actual materials and conditions
have to be performed to ensure satisfactory
performance.
Properties
SikaBiresin CR77 FR (A)
Resin
SikaBiresin CH77-2 (B) Fast
Hardener
Composition Epoxy Amine
Mix ratio by weight 100 12
Aspect Clear liquid Clear liquid
Color (mixed) Light amber
Viscosity Brookfield (mixed) 2,100 cps
Density at 77 F (25 C) (mixed) 9.86 lbs./gal
Pot life (220g) at 77 F (25 C) 68 minutes
SikaBiresin
CR
77
FR
2
/
2
Sika Corporation
30800 Stephenson Highway
Madison Heights, MI 48071
U.S.A.
Telephone: +1 248- 577-0020
Email: tsmh@us.sika.com
www.sikaindustry.com
TYPICAL MECHANICAL AND THERMAL PROPERTIES (NEAT FORM)
Cure Schedule: 24 hours at room temperature + 4 hours at 212 F (100 C)
FLAME RETARDENT PROPERTIES (NEAT FORM)
Tested according to FAR/JAR 25.853 Appendix F, Part (a)(1)(i), (ii), (v)
Cure Schedule: 24 hours at room temperature + 4 hours at 212 F (100 C)
PROCESSING
Alternative post-cure options can be used, if
needed, in processing. Contact Sika Corporation s
Industry Technical Services Department at
tsmh@us.sika.com for additional information and
advice.
Normal health and safety precautions should be
observed when handling these products:
Ensure adequate ventilation
Wear gloves, glasses, and protective clothes
For further information, please consult the Safety
Data Sheets
STORAGE CONDITIONS
Shelf life of resin and hardeners is 24 months
when stored in original, unopened containers
between 65-77 F (15 – 25 C). Keep containers
tightly closed.
PACKAGING INFORMATION
Packaging information is available upon
request. Please contact your local Sika sales
representative.
FURTHER INFORMATION
Advice on specific applications will be given on
request. To contact Sika Corporation s Industry
Technical Services Department, send an email to
tsmh@us.sika.com. Copies of Safety Data
Sheets and Product Data Sheets are available
upon request.
BASIS OF PRODUCT DATA
All technical data stated in this document are
based on laboratory tests. Actual measured data
may vary due to circumstances beyond our
control.
ENVIRONMENTAL, HEALTH AND SAFETY
For further information and advice regarding
transportation, handling, storage and disposal of
chemical products, user should refer to the
actual Safety Data Sheets containing physical,
environmental, toxicological and other safety
related data. User must read the current
actual Safety Data Sheets before using any
products. In case of an emergency, call
CHEMTREC at 1-800-424-9300, International
703-527-3887.
LEGAL DISCLAIMER
Prior to each use of any product of Sika Corporation,
its subsidiaries or affiliates ( SIKA ), the user must
always read and follow the warnings and
instructions on the product s most current product
label, Product Data Sheet and Safety Data Sheet
which are available at usa.sika.com or by contacting
IKA s Technical Service Department via email at
tsmh@us.sika.com. Nothing contained in any SIKA
literature or materials relieves the user of the
obligation to read and follow the warnings and
instructions for each SIKA product as set forth in the
current product label, Product Data Sheet and
Safety Data Sheet prior to use of the SIKA product.
SIKA warrants this product for one year from date
of installation to be free from manufacturing
defects and to meet the technical properties on the
current Product Data Sheet if used as directed
within the product s shelf life. User determines
suitability of product for intended use and assumes
all risks. User s and/or buyer s sole remedy shall be
limited to the purchase price or replacement of this
product exclusive of any labor costs. NO OTHER
WARRANTIES EXPRESS OR IMPLIED SHALL APPLY
INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. SIKA SHALL NOT BE LIABLE
UNDER ANY LEGAL THEORY FOR SPECIAL OR
CONSEQUENTIAL DAMAGES. SIKA SHALL NOT BE
RESPONSIBLE FOR THE USE OF THIS PRODUCT IN A
MANNER TO INFRINGE ON ANY PATENT OR ANY
OTHER INTELLECTUAL PROPERTY RIGHTS HELD BY
OTHERS. Sale of SIKA products are subject to the
Terms and Conditions of Sale which are available at
https://usa.sika.com/en/group/SikaCorp/termsand
conditions.html or by calling +1 800-933-7452.
Properties, Test Method
SikaBiresin CR77 FR (A)
Resin
SikaBiresin CH77- 2 (B) Fast
Hardener
Shore D hardness, ASTM D2240 87
Flexural strength, ASTM D790 23,200 psi (160 MPa)
Flexural modulus, ASTM D790 548,000 psi (3,778 MPa)
Tensile strength, ASTM D638 9,689 psi (66.8 MPa)
Tensile modulus, ASTM D638 228,985 psi (1, 579 Mpa)
Tensile elongation, ASTM D638 5.3%
Tg (DMA), ASTM, ASTM D4065 199 F (93 C)
Test Description Test Method
Test Results
(F1) 60 Second Vertical Burn, 90 Vertical Ignition Test FAR/JAR 25.853 Pass
(F2) 12 Second Vertical Burn, 90 Vertical Ignition Test FAR/JAR 25.853 Pass
(F5) 30 second-45 Angle Burn Test FAR/JAR 25.853 Pass