MAKROLON® SL polycarbonate sheet is an enhanced UV resistant sheet with exceptional weatherability and superior impact strength.

Available in clear as well as a variety of colors, SL is the perfect choice for extended service life and resistance to color shift. MAKROLON SL polycarbonate sheet is easily thermoformed, fabricated, and decorated. This performance is backed by a comprehensive warranty against breakage, excessive yellowing, and loss of light transmission.


Sign applications include predominantly white sign faces, elevated sign masts, and other harsh environment installations. Architectural applications include covered walkways, barrel vaults, upper story school glazing, bus shelters, and thermoformed skylights.

High Impact Strength

MAKROLON polycarbonate sheet is virtually unbreakable with 30 times the impact strength of acrylic and approximately 10 times that of impact modified acrylic.

Code Compliance

MAKROLON polycarbonate sheet products satisfy major building code requirements for a CC-1 rating in construction applications (BOCA, ICBO, SBCCI, and Dade County). MAKROLON polycarbonate sheet is approved for Consumer Product Safety Commission (CPSC 16CFR 1201) categories I & II and ANSI Z97. 1-1984 Safety Glazing Standards. MAKROLON polycarbonate sheet products are listed with Underwriters Laboratories for the UL flammability standard and the UL972 standard for burglary resistant glazing materials. Additionally, MAKROLON polycarbonate sheet is listed with Underwriters Laboratories for the UL48 standard for component sign accessories in rigid signface systems.

Yellowness Index Impact Resistance

Typical Physical Properties

Property Test Method Units MAKROLON
Specific Gravity ASTM D792 - 1.2
Refractive Index @ 72°F ASTM D542 - 1.586
Light Transmission, Clear 1/8" ASTM D1003 % 86
Light Transmission, Gray/Bronze ASTM D1003 % 50
Light Transmission, Dark Gray ASTM D1003 % 18
Rockwell Hardness ASTM D785 - M70/R118
Water Absorption, Equilibrium, 24 hrs ASTM D570 % 0.15
Tensile Strength, Yield ASTM D638 psi 9000
Tensile Strength, Ultimate ASTM D638 psi 9,500
Tensile Modulus ASTM D638 psi 345000
Flexural Strength ASTM D790 psi 13,500
Flexural Modulus ASTM D790 psi 345000
Compressive Strength ASTM D695 psi 12,500
Compressive Modulus ASTM D695 psi 345000
Elongation ASTM D638 % 110
Poisson's Ratio - - 0.38
Izod Impact Strength,
Notched @ 1/8"
ASTM D256 Ft-lbs/in 12-16
Izod Impact Strength, Unnotched @ 1/8" ASTM D256 Ft-lbs/in 60 (No failure)
Instrumented Impact, 1/8˝ ASTM D3763 Ft-lbs >45
Shear Strength, @ Yield ASTM D732 psi 6000
Shear Strength, Ultimate ASTM D732 psi 10000
Shear Modulus ASTM D732 psi 114000
Coefficient of Thermal Expansion ASTM D696 In/in/F 3.75 x 10-5
Coefficient of Thermal Conductivity ASTM C177 Btu-in/hr-ft2-F 1.35
Heat Deflection Temperature, @ 264 psi ASTM D648 F 270
Heat Deflection Temperature, @ 66 psi ASTM D648 F 280
Brittle Temperature ASTM D746 F -200
Shading Coefficient, Clear 1/8˝ ASHRAE - 1.02
Shading Coefficient Gray, Bronze 1/8˝ ASHRAE - 0.7
U Value 1/4˝ (summer gain, winter loss) - - 0.90, 0.96
Dieletric Constant, @ 10 Hz ASTM D150 - 2.96
Dieletric Constant, @ 60 Hz ASTM D150 - 3.17
Volume Resistivity ASTM D257 Ohm-cm 8.2 x 1016
Dissipation Factor, @ 60 Hz ASTM D150 - 0.0009
Dissipation Factor, @ 1 Hz ASTM D150 - 0.01
Arc Resistance ASTM D495 Seconds
    S. Steel Strip Electrode 10-11
    Tungsten Electrode 120
Dielectric Strength, in air, 125 mils ASTM D149 V/mil 380
Horizontal Burn, AEB ASTM D635 Inches <1
Ignition Temperature, Self ASTM D1929 F 1070
Ignition Temperature, Flash ASTM D1929 F 870
UL 94, Clear @ .060˝ UL 94 - V2
UL 94, Clear @ .220˝ UL 94 - V0

Sheffield Plastics Inc. will not be responsible for the use of this information relative to actual application. Users must make their own determination of its suitability for their specific application. No warranty is made for the fitness of any product, and nothing herein waives any of the seller’s conditions of sale.