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The USA INDUSTRIALS BULK-RS-S40-27 is a stock-length silicone rubber sheet used in gasketing, sealing, vibration damping, and thermal insulation applications across HVAC, plumbing, electrical, and industrial trades. Measuring 12 inches wide by 12 inches long, this red silicone sheet carries a Shore A durometer rating of 35 to 45, placing it in the soft-to-medium flexibility range. It withstands temperatures from -60 degrees F to 500 degrees F and delivers a tensile strength of 650 psi, making it suitable for high-heat or wide-temperature-swing environments where standard rubber compounds fail.
This silicone sheet is well suited for residential and commercial applications requiring cut-to-fit gaskets, thermal pads, equipment mounts, or sealing inserts. HVAC technicians commonly use silicone sheeting to fabricate custom gaskets for air handling equipment, duct connections, and heat-producing components. Plumbers and pipefitters use it for flange seals and vibration isolation. The 12-inch by 12-inch format provides a practical starting size for single-use cuts or low-volume fabrication work without material waste.
Designed as a general-purpose silicone rubber sheet for fabrication of custom gaskets, seals, pads, and isolation mounts across HVAC, plumbing, and industrial applications.
Cut to required dimensions using a sharp utility knife, die cutter, or scissors before installation. Always shut down and de-energize or depressurize the system before replacing or installing any gasket or sealing component. Verify that the sheet thickness and durometer are appropriate for the specific joint load and temperature conditions of the application. Consult applicable mechanical or plumbing codes when using fabricated gaskets in pressure-rated systems.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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