Polycast is known, the world over,
as a leading producer of cast acrylic sheet
for aircraft cabin windows, fighter
canopies, windscreens, wing-tip lenses,
outer laminates and instrument panels for
general aviation and military aircraft. Our
range of sizes, thicknesses, colors and
research facilities are dedicated to meeting
the present and future needs of the
demanding aerospace industry. Polycast is
also recognized as the manufacturer most
responsive to the specific needs of its
Having been manufacturing cast acrylic sheet
for over 30 years, Polycast is
presently the principal supplier meeting
U.S. Military Material Specifications
MIL-P-5425, MIL-P-8184, and MIL-P-25690 to
the United States aerospace industry. In
fact, MIL-P-8184 has been revised to
recognize the improved performance of an
enhanced crazed-resistant material that Polycast developed.
Other accomplishments include:
Everyone at Polycast is dedicated
to the development of improved acrylic
products to meet the fast-changing demands
of commercial and military aircraft
manufacturers. Polycast standards
consistently surpass the quality levels
required by the Mil Spec and our strong
technical support team is widely recognized
as a leader in the aerospace industry.
- The production of a horizontally
shrunk sheet with residual shrinkage of
less than .25% that allows for forming
before fabrication, a characteristic
ideal for the construction of edgelit
panel and radar screen applications.
- The development of a sheet with
different thicknesses in the center and
edges, an innovation that enabled an
aircraft manufacturer to design a canopy
with strong frontal impact capabilities
yet thin enough for a pilot to eject
- The formulation of colors for
meeting specific percentages of light
transmission at final stretched
Aerospace Grade Products
Below is an overview of our aerospace grade
acrylic sheet. For technical data,
please download our brochure on our
POLY A (ASTM D-4802)
is our standard unshrunk acrylic
manufactured to a visual and optical
aircraft specification. It is available in
clear as well as transparent colors. Common
applications are non-critical glazing for
commercial helicopters and sport planes.
POLY FR9 is an
interior acrylic material ideal for aircraft
applications where low flame spread and low
smoke generation are desirable.
Download Poly FR9 Brochure
POLY 900 is a
semi-cross-linked material formulated to
meet British specifications DTD-5592.
POLY II (MIL-P-5425)
military specification covering
heat-resistant, preshrunk, clear, and
colored acrylic sheet. Material supplied for
conformance for this specification is
identified by the name POLY II®. Polycast is
qualified to furnish sheets in thickness
0.060-1.000 to meet this specification.
POLY 76 (MIL-P-8184)
is a crosslinked, preshrunk acrylic with
excellent resistance to crazing, solvent
attacks and thermal dimensional change. As
one of few U.S. Military approved materials
for stretched panels (MIL-P-25690),
sophisticated applications for both military
and commercial aircraft are numerous.
Availability in transparent colors enhances
the versatility of this product. It meets or
exceeds all requirements of MIL-P-8184, Type
I and II, Class 1 and 2.
POLY 84 (MIL-P-8184)
is a uniquely formulated, crosslinked
preshrunk acrylic specifically designed to
provide superior craze and solvent
resistance for today's changing environment.
Improvements such as lower water absorption
and increased resistance to acids expands
the number of "as cast" applications. Poly
84 also meets or exceeds MIL-P-8184, Type I
and II, Class 1 and 2. Its superior craze
resistance makes it ideal for monolithic
windscreens, outer laminates and canopies.
It is also available in transparent colors.
It meets or exceeds all requirements of
MIL-P-8184.Type I and II, Class 1 and 2.
POLY 2000 (MIL-P-25690)
military specification covering stretched
acrylic sheet specially designed from
Mil-P-8184 base material. It offers enhanced
craze properties and increased crack
resistance. Material supplied for
conformance to this specification is
identified as Poly 2000™.
Download Poly 2000 Brochure