Armacell ARMA-BST11812 Pipe Insulation 1-1/8 in Id

Product Description

The ARMACELL ARMA-BST11812 is a closed-cell elastomeric pipe insulation sleeve designed for thermal and condensation control on refrigerant, chilled water, and cold-water piping systems. Each section measures 1-1/8 inches inner diameter with a 1/2 inch wall thickness and 6 feet in length. The lapseal design integrates a factory-applied self-sealing lap strip along the slit edge, allowing the insulation to be installed without additional adhesive at the longitudinal seam. Licensed HVAC technicians, plumbers, and mechanical insulation contractors are the primary installers for this product type.

This product is suited for residential and commercial mechanical systems where controlling heat gain and preventing condensation on cold piping is required. Common applications include refrigerant suction lines, chilled water supply and return piping, and domestic cold-water lines in both new construction and retrofit installations. The carton contains 150 linear feet of insulation, making it appropriate for larger job quantities rather than single-pipe spot repairs.

Key Features

• 1-1/8 inch inner diameter fits standard pipe and tubing OD sizes for suction line and chilled water applications
• 1/2 inch wall thickness provides thermal resistance and condensation control
• Lapseal self-sealing longitudinal slit eliminates the need for separate seam adhesive during installation
• 6-foot sections allow for easy handling and cutting to length on the job
• 150 linear feet per carton supports full-system installs and reduces per-foot material cost on larger projects
• Closed-cell elastomeric construction resists moisture absorption and vapor diffusion

Compatibility

Designed as an OEM-style replacement and standard-fit insulation sleeve for copper and plastic pipe and tubing with a 1-1/8 inch outer diameter in residential and commercial mechanical piping systems.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or mechanical insulation contractors. Shut off and depressurize the piping system and allow lines to reach ambient temperature before applying insulation. Slide sections over the pipe or slit and wrap around existing piping, pressing the lapseal strip firmly to close the longitudinal seam. For end joints and fittings, use compatible elastomeric insulation adhesive per the manufacturer instructions and applicable mechanical code requirements.

Technical Specifications

• Inner Diameter: 1-1/8 inches
• Wall Thickness: 1/2 inch
• Section Length: 6 feet
• Carton Quantity: 150 linear feet
• Seam Type: Lapseal self-sealing
• Country of Origin: United States

Standard Information

• Brand: ARMACELL
• Manufacturer Part Number: ARMA-BST11812