Bayflex® 5253

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Product Types

  • System


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General Characterization

Bayflex® 5253 is a moldable microcellular polyurethane foam, designed for high production molded gasket applications such as radial seal filters.

Storage Conditions

Avoid moisture contamination during storage, handling, and processing. For both components, pad containers with either nitrogen or dry air (desiccant cartridge or air dryer at -40°F dew point).
Store poly component B from 18 °C to 30 °C (65°F to 85°F). Mix poly component to a homogenous state before use and before removing any material from container.
For optimum shelf life, the recommended storage temperature for the isocyanate component is 20 °C to 35 °C (68°F to 95°F). Do not expose isocyanate component to lower temperatures – freezing may occur.


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Packaging Type

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Technical Properties & Datasheets

Property Name Test Method Unit Value
Rise Time seg 78 ± 4
Mold Temperature °C 53 ± 5
Cream Time seg 26 ± 3
Free Rise Density kg/m^3 255
Mix Ratio by Weigh polyol/isocyanate 100/48
Material Temperature °C 30 - 40

Property Name Test Method Unit Value
Appearance Black liquid
Specific Gravity approx. 1.05
Dynamic Viscosity 25 °C mPa.s 1200
No. OH mg KOH/g 138
Water Content wt. % max. 0.3


Technical Data Sheet
Safety Data Sheet
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