LANCASTER, N.Y.—Apple Rubber Products Inc. has released two silicone compounds with UL 50 and UL 50 E certifications for use with and without environmental considerations.

The company said the compounds, 14SL7ML and 35SL5ML, provide an ultra-low compression set, even at elevated temperatures, and offer the quality and durability needed for safe operations.

With the UL 50 and UL 50E certifications, the product can be used for atmospheric ozone and generated ozone, therefore eliminating any environmental concerns due to ozone attacks. The compounds don't contain any phthalate plasticizers or require any anti-corrosion inhibitors for metal enclosures. They are cured without sulfur or peroxide to allow very little residue that may outgas and corrode electrical components.

Apple Rubber said it tested 14SL7ML to ASTM E 595, the standard for outgas testing. Results fell well within the screening levels for spacecraft materials.

These compounds withstand severe climates, allowing for use in environments where temperatures are between -65°C and +200°C. These compounds have been approved for Type 12, 12K or 13 enclosures that require oil swell resistance.