Questions about Thermoset Composites?

Low Smoke & Flame Spread Sheet Molding Compound

These materials are designed to meet construction and building standards. They are designed to provide low smoke generation and flame spread in accordance with ASTM E162, E662 and E84 standards. They have good physical properties and be pigmented to meet a variety of color standards.

Please note: all of our materials are custom developed to meet your specific requirements, if you don't see a product performance metric that meets your needs, call us to discuss your specific project requirements at 317.773.1766 or email us at

Low Smoke & Flame Spread Sheet Molding Compound

S42 Series – Low Pressure, Low Density, Low Smoke
Sheet Molding Compound (SMC)


Glass Content 30%



Impact Strength-Izod Unnotched
Test Method: ASTM D-4812


1,010 J/m

Flexural Strength
Test Method: ASTM D-790

21,000 psi

145 MPa

Flexural Modulus
Test Method: ASTM D-790

1,000 ksi

7 GPa

Tensile Strength
Test Method: ASTM D-638

10,000 psi

69 MPa

Tensile Modulus
Test Method: ASTM D-638

1,700 ksi

12 GPa

Compressive Strength
Test Method: ASTM D-695

19,000 psi

131 MPa

Water Absorption (24 Hrs @ 23C)
Test Method: ASTM D-570


Barcol Hardness
Test Method: ASTM D-2583

30 to 60

Heat Distortion Temperature @ 264 psi
Test Method: ASTM D-648



Specific Gravity
Test Method: ASTM D-792

1.5 to 1.7

Test Method: ASTM D-955

0.05 to 0.20%

Flame Spread Index
Test Method: ASTM E162


Specific Optical Density @ 1.5 min
Test Method: ASTM E662

0 Non Flaming

1 Flaming

Specific Optical Density @ 4 min
Test Method: ASTM E662

10 Non Flaming

25 Flaming

Click to download a pdf of the S42 Series Data Sheet

The information on this sheet is a guide. The stated values reflect an average of several tests conducted on CI's goods. These values were obtained under ideal conditions and may not be replicated in any particular test, part, or application. Because the values achieved in actual parts depend considerably on part design, molding conditions, and testing methods, no guarantee is made or implied regarding values to be obtained in any specific test, part, or application. CI makes no warranty or representation as to the suitability of any of its goods for use in any application. CI relies on customer to conduct its own tests and judge for itself the suitability of CI's goods.