Flame-Retardant Garolite G-10/FR4 Sheet
Multipurpose, 12" x 12", 5/16" Thick, Black





Performance | Extreme Strength, Flame Retardant, High Strength, High Temperature, Highly Absorbent, Highly Electrically Insulating, Moisture Resistant, Ultra Impact Resistant |
Tolerance Rating | Standard |
Color | Black |
Thickness | 5/16" |
Thickness Tolerance | -0.026" to 0.026" |
Width | 12" |
Width Tolerance | -1/4" to 1/4" |
Length | 12" |
Length Tolerance | -1/4" to 1/4" |
Temperature | |
Minimum | Not Rated |
Maximum | 280° F |
Tensile Strength | 35,000 psi to 50,000 psi |
Impact Strength | 5.5 ft·lbf/in to 12 ft·lbf/in |
Hardness | Rockwell M110 |
Hardness Rating | Extra Hard |
For Use Outdoors | No |
Military Specification | MIL-I-24768/27 |
Flammability Rating | UL 94 V-0 |
Application | Multipurpose |
Backing Type | Plain |
Clarity | Opaque |
Compressive Strength Range | 35,000 psi to 66,000 psi |
Density | 0.069 lb/in³ |
Dielectric Strength | 350 V/mil to 800 V/mil |
Flatness Tolerance | Not Rated |
Flexibility | Rigid |
Flexural Strength | 45,000 psi to 60,000 psi |
Material | Garolite |
Material Grade | Garolite G-10/FR4 |
Reinforcement Material | Fiberglass Fabric |
Resin Material | Epoxy |
Shape | Sheet, Bar |
Texture | Smooth |
Warning Message | Physical and mechanical properties are not guaranteed. They are intended only as a basis for comparison and not for design purposes. |
Water Absorption | 0.1% to 0.15% |
Country of Origin | United States |
DFARS Compliance | Specialty Metals COTS-Exempt |
Export Control Classification Number (ECCN) | EAR99 |
REACH Compliance | REACH (EC 1907/2006) (02/04/2026, 253 SVHC) Compliant |
RoHS Compliance | RoHS 3 (2015/863/EU) Compliant |
Schedule B Number | 392190.5050 |
U.S.–Mexico–Canada Agreement (USMCA) Qualifying | Yes |
Additional Specifications |
A good all-around choice, these Garolite G-10/FR4 sheets and bars are strong, machinable, and electrically insulating. They're made of a flame-retardant epoxy resin with fiberglass fabric reinforcement. Garolite G-10/FR4 is also called epoxy-grade industrial laminate and phenolic.
If you don't see the size you're looking for, please specify a length under additional bar lengths.
The information in this 3-D model is provided for reference only.

























