POLYBAC #500 - POLYGEM, Inc.

3. PRODUCT DESCRIPTION
POLYBAC® #500 is a single component, silicone adhesive sealant which cures to a tough, rubbery solid at room temperature on exposure to water vapor in the air (acetoxy cure).

POLYBAC® #500 can be applied overhead without sagging. Adheres to clean substrates such as: metal, glass, most woods, ceramics, painted surfaces and many other substrates.

POLYBAC® #500 was formulated to perform at temperatures ranging from -86°F to 400°F continuously and at 425°F intermittently.

APPLICATIONS: Gaskets in heating and refrigeration units, applying brackets or nameplates, sealing windows, formed-in-place gaskets, anti-abrasion coating, sealing marine cabins, caulking joints and applying ceramic wear tiles.

POLYBAC® #500 can also be used as a sealant for venting high efficiency furnaces.

SPECIFICATIONS: Conforms to MIL Spec. MIL-A-46106A, Amend. 2, Type 1.
FDA Regulation No.21 CFR 177.2600 (formerly 121.2562.)

4. APPLICATION INSTRUCTIONS

Surface must be clean, dry and free of dirt and oil. Do not apply if frost is present.
Cut tip to desired bead size. Dispense with caulking gun.
Apply sealant at 45° angle by pushing sealant ahead of nozzle.
Work material with putty knife or similar tool.
Allow 30 minutes to touch; 24 hours for full cure and strength.

Consult Polygem for additional technical instructions

Packaging
drums, 5 gallon, 10.3 oz., 4.7 oz., 3.0 oz. cartridges.

Shelf Life
1 year unopened.

5.TECHNICAL DATA

Performance Properties

Test Test Method Results

As supplied---

Colors aluminum, black, clear, white

Specific Gravity @ 77° F (25° C) 1.04

Extrusion Rate (1/8” orifice, 90 psi air pressure) 350 gms/min

Flow Rate (sag or slump on 1/8 x 4” bead), in nil

Tack-free Time @ 77° F (25° C) and 50% RH 10-20 minutes

Cure Time @ 77° F (25° C) and 50% RH (1/8” thickness) 24 hours

As cured---

Durometer Hardness, Shore A ASTM D-676 30

Tensile Strength ASTM D-412 350 psi (min)

Elongation ASTM D-412 500%

Brittle Point ASTM D-746 -100° F (-73° C)

ASTM D-2137A Volume Coefficient of Thermal Expansion 32 to 212° F 9.3 x 10^-4

ASTM D-2137A Thermal Conductivity, cal/(cm) (degrees C) (sec) 0.45x 10^-3

BTU per (ft)(degrees F)(hr) 0.11

As cured - Electrical

Volume Resistivity, ASTM D-257 ohm-cm 1.5 x 10¹⁵

Dielectric Strength, ASTM D-149, volts/mil 550

Dielectric Constant, ASTM D-150, at 60 Hz-2.8, at 100 Hz-2.8, at 100 KHz-2.8

Dissipation Factor, ASTM D 150, at 60 Hz-0.0015, at 100 Hz-0.0015, at 100 KHz-0.0015

Polygem, Inc. warrants its products to be free of manufacturing defects and that, at the time and place of shipment, our material will meet current physical properties when applied within Polygem’s directions and tested in accordance with ASTM and Polygem standards. Polygem, Inc’s liability is limited to replacement of material found defective. As Polygem, Inc. has no control over the use to which others may put its products, it is recommended that the product be tested to determine if suitable for a specific application and/or our information is valid in a particular circumstance. Responsibility remains with the architect or engineer, contractor and owner for the design, application and proper installation of each product. Nothing contained herein shall be construed to be a recommendation to use or as a license to operate under or to infringe any existing patents.

Data sheets are subject to change without notice, for latest revision check our website at www.polygem.com