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POLYBACŪ #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).
POLYBACŪ #500 can be applied overhead without sagging. Adheres to clean substrates such as: metal, glass, most woods, ceramics, painted surfaces and many other substrates.
POLYBACŪ #500 was formulated to perform at temperatures ranging from -86°F to 400°F continuously and at 425°F intermittently.
Performance Properties
| Test |
Test Method Results |
| Colors | aluminum, black, clear, white |
| Specific Gravity @ 77° F (25° C) | 1.04
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| Extrusion Rate (1/8 orifice, 90 psi air pressure) | 350 gms/min
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| Flow Rate (sag or slump on 1/8 x 4 bead), in | nil
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| Tack-tree Time @ 77° F (25° C) and 50% RH | 10-20 minutes
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| Cure Time @ 77° F (25° C) and 50% RH (1/8 thickness) | 24 hours
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MIXING 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.
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