SikaBiresin
L337
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PRODUCT DATA SHEET
SikaBiresin L337
Version 01.01 (08 – 2023), en_US
PRODUCT DATA SHEET
SikaBiresin L337 (Formerly EL-337)
Filled Epoxy Laminating System for High Temperature Applications
TYPICAL PHYSICAL PROPERTIES (FOR FURTHER VALUES SEE SAFETY DATA SHEET)
DESCRIPTION
SikaBiresin L337
is a two component, filled,
non-staining epoxy laminating system that
provides room temperature hardening (B
Stage) and is designed for high temperature
laminating and tooling applications.
SikaBiresin L337
has excellent handling
properties and fabric wet-out to produce a
void free tool with high dimensional stability.
Tools made with SikaBiresin L337 can be
used at continuous temperatures of 230 F
(110 C) and up to a 250 F (121 C) intermittent
use maximum. While SikaBiresin L337
will
gel at room temperature, it must be post-
cured to achieve ultimate strength.
PRODUCT BENEFITS
– For applications up to 250 F (121 C)
– High mechanical properties
– Excellent cloth wet-out
– Excellent dimensional stability
AREAS OF APPLICATION
Typical applications include vacuum form
molds, prototype injection molds, high
temperature bonding fixtures, spray metal
molds, compression molds, high
temperature laminating molds and parts to
be used in high temperature applications.
SikaBiresin L337 can be used with Sika s
intermediate-to-high temperature surface
coats: ES-229, SP-707, or ES-224.
Properties
SikaBiresin L337 (A)
Resin
SikaBiresin L337 (B)
Hardener
Composition Epoxy Amine
Mix ratio by weight
Mix ratio by volume
100
100
16
21
Aspect Gray liquid Clear amber liquid
Color (mixed) n/a Grey
Viscosity Brookfield (mixed) n/a 3,000 – 5,000 cps
Density at 77 F (25 C) (mixed) n/a 10.51 lbs./gal
Pot life (228g) at 77 F (25 C) n/a 45 – 60 Minutes
SikaBiresin
L337
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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 UNLESS NOTED)
PROCESSING
Preliminary self-support cure schedule: Cure
for 24 hours at 77 F (25 C) + 4 hours at 125 F
(51.6 C) – 140 F (60 C) range. You may attach
support structure and demold tool after this
schedule is completed before additional cure
is given.
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.
Heating and cooling rates during post-cure:
Always allow tools made with Sika high
temperature systems to gel at room
temperature before subjecting them to post
cure (24 hours is usually sufficient). This will
prevent excessive exotherm and shrink stress
from occurring. When oven curing laminated
molds, always place mold in a room
temperature oven and increase temperature
at a rate of no more than 50 F (30 C) per hour.
When heat cure is completed, turn off oven
and allow molds to remain in the oven. Never
remove mold from oven until mold
temperature has been lowered to less than
100 F (38 C).
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,
International703-527-3887.
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
SIKA 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 L337 (A)
Resin
SikaBiresin L337 (B)
Hardener
Hardness, Shore D, ASTM D2240 88
Flexural strength, ASTM D790
A
39,035psi (269MPa)
Flexural modulus, ASTM D790
A
1,300,000psi (8,963MPa)
Tensile strength, ASTM D638
A
27,285psi (188MPa)
Compressive strength, ASTM D695 14,930 psi (103 MPa)
Izod Impact Strength (notched) , ASTM D256 5.29 in-lbf/in
Glass Transition Temperature (Tg by DMA) 238 F (115 C)
Coefficient of thermal expansion – TMA 24 ppm/ F (43 ppm/ C)
(A)
6-Layer, 10 ounce glass fabric laminate
Cured 24 hours at 77 F (25 C) + 2 hours at 150 F (66 C) + 2 hours at 200 F (93 C) + 2 hours at 250 F (121 C) + 3 hours at 300 F
(149 C).