F-50 A/B Page 1 of 2 Date: 01/04/2023
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
www.bjbenterprises.com
F-50 A/B
55 SHORE A POLYURETHANE ELASTOMER
The F-50 A/B is a 55 Shore A production-oriented polyurethane system. This material features quick demold times, excellent
physical properties and a non-mercury based catalyst. F-50 A/B processes at ambient temperatures and is easily colored.
Rapid demolds Ideal for part production
Very easy to use Excellent tear strength and toughness
PHYSICAL PROPERTIES TEST METHOD ELEVATED TEMPERATURE CURE*
Hardness, Shore A ASTM D2240 55 5
Density (g/cc) ASTM D792 1.07
Cubic Inches per Pound N/A 26.1
Color/Appearance Visual Transparent Pale Yellow
Tensile Strength (psi) ASTM D412 845
Elongation (%) ASTM D412 425
Tear Strength (pli) ASTM D624 95
Shrinkage (in/in) linear ASTM D2566 @ 1 depth 0.001
HANDLING PROPERTIES Part A Part B
Mix Ratio by weight 50 100
Mix Ratio by volume (cartridge dispense friendly) 46 100
Specific Gravity @ 77 F (25 C) 1.13 1.03
Color Pale Yellow Amber
Viscosity (cps) @ 77 F (25 C) Brookfield 550 850
Mixed Viscosity (cps) @ 77 F (25 C) Brookfield 930
Work Time, 100 g mass @ 77 F (25 C) 7 8 minutes
Gel Time 9 10 minutes
Demold Time @ 77 F (25 C) 2 3 hours
Properties above are typical and not for specifications.
SHORE A POLYURETHANES
Dedicated to QUALITY, SERVICE, SAFETY, and INNOVATION
An ISO-9001 Certified company
F-50 A/B Page 2 of 2 Date: 01/04/2023
For more information call BJB Enterprises, Inc. (714) 734-8450 Fax (714) 734-8929
NON-WARRANTY “Except for a warranty that materials substantially comply with the data presented in Manufacturer’s latest bulletin describing the product (the basis for this substantial
compliance is to be determined by the standard quality control tests generally performed by Manufacturer), all materials are sold “AS IS” and without any warranty express or implied as
to merchantability, fitness for a particular purpose, patent, trademark or copyright infringement, or as to any other matter. In no event shall Manufacturer’s liability for damages exceed
Manufacturer’s sale price of the particular quantity with respect to which damages are claimed.”
CURE SCHEDULE/HEAT CURING:
Most of the physical properties can be achieved in 5-7 days at 77 F (25 C). You may use your own post-cure schedule but the physical
properties may vary from BJB s cure schedule of 1-3 hours at 77 F (25 C) followed by 16 hours at 160 F (71 C). Do not exceed
curing temperature of 200 F (93 C).
STORAGE:
Store at ambient temperatures, 65-80 F (18-27 C). Unopened containers will have a shelf life of 6 months from date of shipment when
properly stored at recommended temperatures. Purge opened containers with dry nitrogen before re-sealing.
NOTE:
F-50 Part B, in liquid form, will darken with age. Opened containers of material should be purged with dry nitrogen prior to replacing
lids or caps to prevent moisture contamination. Prolonged direct exposure to sunlight can affect the surface of this product. Cover
molds or other products when storing outdoors. The cure will be inhibited if cast against a tin catalyzed silicone RTV.
PACKAGING Part A Part B Cubic Inches per Kit
5-Gallon Kits 20 lbs. 40 lbs. 1,566
55-Gallon Drum Kits 200 lbs. 400 lbs. 15,660
SAFETY PRECAUTIONS:
Use in a well-ventilated area. Avoid contact with skin using protective gloves and protective clothing. Repeated or prolonged contact
on the skin may cause an allergic reaction. Eye protection is extremely important. Always use approved safety glasses or goggles
when handling this product.
IF CONTACT OCCURS:
Skin: Immediately wash with soap and water. Remove contaminated clothing and launder before reuse. It is not
recommended to remove resin from skin with solvents. Solvents only increase contact and dry skin. Seek qualified
medical attention if allergic reactions occur.
Eyes: Immediately flush with water for at least 15 minutes. Call a physician.
Ingestion: If swallowed, call a physician immediately. Remove stomach contents by gastric suction or induce vomiting only as
directed by medical personnel. Never give anything by mouth to an unconscious person.
Refer to the Material Safety Data Sheet before using this product.
WARNING: This product can expose you to chemicals including Butyl benzyl phthalate (BBP), which is known to the State of
California to cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
Handling Guide