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    Lengths - Insulation

    Insulation lengths are available in 2-meter lengths coming in multiple wall thickness options with a core stock of 3/8", 1/2" & 3/4". These are designed for thermal insulation of pipework in HVAC systems. The insulation helps improve energy efficiency and reduce condensation. The two leading brands offered by Smith Brothers are:

    • Kaimann

    • Armacell

    Both brands are known for high-quality elastomeric foam insulation, suitable for commercial and residential air conditioning systems. Other version of insulation such as self-seal can be found with the consumables section on the website HERE.

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    Picture of 15mm x 25mm Insulation Tube Class O 2m (5/8"x1" Wall) (56 Metres Per Box)

    15mm x 25mm Insulation Tube Class O 2m (5/8"x1" Wall) (56 Metres Per Box)

    KAI015025
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 5/8in (15mm) Bore x 1in (25mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 35mm x 19mm Insulation Tube Class O 2m (1 3/8"x3/4" Wall) (48 Metres Per Box)

    35mm x 19mm Insulation Tube Class O 2m (1 3/8"x3/4" Wall) (48 Metres Per Box)

    KAI035019
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 1-3/8in (35mm) Bore x 3/4in (19mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    20x13 EVO Armaflex Insulation Unslit (3/4" x 1/2" Wall) (104m per Box)

    ARM020013
    Armaflex Pipe Insulation. 3/4in (20mm) Bore x 1/2in (13mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    35x9 EVO Armaflex Insulation Unslit (1 3/8" x 3/8" Wall) (76m per Box)

    ARM035009
    Armaflex Pipe Insulation. 1.3/8in (35mm) Bore x 3/8in (09mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    22x13 EVO Armaflex Insulation Unslit (7/8" x 1/2" Wall) (100m per Box)

    ARM022013
    Armaflex Pipe Insulation. 7/8in (22mm) Bore x 1/2in (13mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Picture of 54mm x 9mm Insulation Tube Class O 2m (2 1/8"x3/8" Wall) (60 Metres Per Box)

    54mm x 9mm Insulation Tube Class O 2m (2 1/8"x3/8" Wall) (60 Metres Per Box)

    KAI054009
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 2-1/8in (54mm) Bore x 3/8in (9mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: Out of Stock
    Picture of 54mm x 13mm Insulation Tube Class O 2m (2 1/8"x1/2" Wall) (46 Metres Per Box)

    54mm x 13mm Insulation Tube Class O 2m (2 1/8"x1/2" Wall) (46 Metres Per Box)

    KAI054013
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 2-1/8in (54mm) Bore x 1/2in (13mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 28mm x 19mm Insulation Tube Class O 2m (1 1/8"x3/4" Wall) (56 Metres Per Box)

    28mm x 19mm Insulation Tube Class O 2m (1 1/8"x3/4" Wall) (56 Metres Per Box)

    KAI028019
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 1-1/8in (28mm) Bore x 3/4in (19mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 20mm x 19mm Insulation Tube Class O 2m (3/4"x3/4" Wall) (76 Metres Per Box)

    20mm x 19mm Insulation Tube Class O 2m (3/4"x3/4" Wall) (76 Metres Per Box)

    KAI020019
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 3/4in (20mm) Bore x 3/4in (19mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    28x9 EVO Armaflex Insulation Unslit (11/8" x 3/8" Wall) (98m per Box)

    ARM028009
    Armaflex Pipe Insulation. 1.1/8in (28mm) Bore x 3/8in (09mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    15x13 EVO Armaflex Insulation Unslit (5/8" x 1/2" Wall) (122m per Box)

    ARM015013
    Armaflex Pipe Insulation. 5/8in (15mm) Bore x 1/2in (13mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Picture of 12mm x 19mm Insulation Tube Class O 2m (1/2"x3/4" Wall) (100 Metres Per Box)

    12mm x 19mm Insulation Tube Class O 2m (1/2"x3/4" Wall) (100 Metres Per Box)

    KAI012019
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 1/2in (12mm) Bore x 3/4in (19mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    12x13 EVO Armaflex Insulation Unslit (1/2" x 1/2" Wall) (142m per Box)

    ARM012013
    Armaflex Pipe Insulation. 1/2in (12mm) Bore x 1/2in (13mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    10x13 EVO Armaflex Insulation Unslit (3/8" x 1/2" Wall) (172m per Box)

    ARM010013
    Armaflex Pipe Insulation. 3/8in (10mm) Bore x 1/2in (13mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Picture of 22mm x 19mm Insulation Tube Class O 2m (7/8"x3/4" Wall) (72 Metres Per Box)

    22mm x 19mm Insulation Tube Class O 2m (7/8"x3/4" Wall) (72 Metres Per Box)

    KAI022019
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 7/8in (22mm) Bore x 3/4in (19mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 42mm x 13mm Insulation Tube Class O 2m (1 5/8"x1/2" Wall) (56 Metres Per Box)

    42mm x 13mm Insulation Tube Class O 2m (1 5/8"x1/2" Wall) (56 Metres Per Box)

    KAI042013
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 1-5/8in (42mm) Bore x 1/2in (13mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    22x9 EVO Armaflex Insulation Unslit (7/8" x 3/8" Wall) (140m per Box)

    ARM022009
    Armaflex Pipe Insulation. 7/8in (22mm) Bore x 3/8in (09mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    20x9 EVO Armaflex Insulation Unslit (3/4" x 3/8" Wall) (140m per Box)

    ARM020009
    Armaflex Pipe Insulation. 3/4in (20mm) Bore x 3/8in (09mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    6x13 EVO Armaflex Insulation Unslit (1/4" x 1/2" Wall) (200m per Box)

    ARM006013
    Armaflex Pipe Insulation. 1/4in (06mm) Bore x 1/2in (13mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Picture of 10mm x 19mm Insulation Tube Class O 2m (3/8"x3/4" Wall) (108 Metres Per Box)

    10mm x 19mm Insulation Tube Class O 2m (3/8"x3/4" Wall) (108 Metres Per Box)

    KAI010019
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 3/8in (10mm) Bore x 3/4in (19mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    15x9 EVO Armaflex Insulation Unslit (5/8" x 3/8" Wall) (200m per Box)

    ARM015009
    Armaflex Pipe Insulation. 5/8in (15mm) Bore x 3/8in (09mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Picture of 35mm x 13mm Insulation Tube Class O 2m (1 3/8"x1/2" Wall) (76 Metres Per Box)

    35mm x 13mm Insulation Tube Class O 2m (1 3/8"x1/2" Wall) (76 Metres Per Box)

    KAI035013
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 1-3/8in (35mm) Bore x 1/2in (13mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 15mm x 19mm Insulation Tube Class O 2m (5/8"x3/4" Wall) (80 Metres Per Box)

    15mm x 19mm Insulation Tube Class O 2m (5/8"x3/4" Wall) (80 Metres Per Box)

    KAI015019
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 5/8in (15mm) Bore x 3/4in (19mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    12x9 EVO Armaflex Insulation Unslit (1/2" x 3/8" Wall) (234m per Box)

    ARM012009
    Armaflex Pipe Insulation. 1/2in (12mm) Bore x 3/8in (09mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    10x9 EVO Armaflex Insulation Unslit (3/8" x 3/8" Wall) (266m per Box)

    ARM010009
    Armaflex Pipe Insulation. 3/8in (10mm) Bore x 3/8in (09mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Picture of 28mm x 13mm Insulation Tube Class O 2m (1 1/8"x1/2" Wall) (84 Metres Per Box)

    28mm x 13mm Insulation Tube Class O 2m (1 1/8"x1/2" Wall) (84 Metres Per Box)

    KAI028013
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 1-1/8in (28mm) Bore x 1/2in (13mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 42mm x 9mm Insulation Tube Class O 2m (1 5/8"x3/8" Wall (70 Metres Per Box)

    42mm x 9mm Insulation Tube Class O 2m (1 5/8"x3/8" Wall (70 Metres Per Box)

    KAI042009
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 1-5/8in (42mm) Bore x 3/8in (9mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Armacell Class O Armaflex Insulation Unslit

    6x9 EVO Armaflex Insulation Unslit (1/4" x 3/8" Wall) (352m per Box)

    ARM006009
    Armaflex Pipe Insulation. 1/4in (06mm) Bore x 3/8in (09mm) Wall. Black unslit flexible nitrile rubber insulation that offers reliable protection against condensation and effectively preventing energy loss. Suitable for use on hot and cold water services, chilled water lines, heating systems, air conditioning ductwork, refrigerated pipework, process and industrial pipework and equipment. (Price Per Metre - Sold in 2m Lengths)
    Status: In Stock
    Picture of 22mm x 13mm Insulation Tube Class O 2m (7/8"x1/2" Wall) (108 Metres Per Box)

    22mm x 13mm Insulation Tube Class O 2m (7/8"x1/2" Wall) (108 Metres Per Box)

    KAI022013
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 7/8in (22mm) Bore x 1/2in (13mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 35mm x 9mm Insulation Tube Class O 2m (1 3/8"x3/8" Wall) (92 Metres Per Box)

    35mm x 9mm Insulation Tube Class O 2m (1 3/8"x3/8" Wall) (92 Metres Per Box)

    KAI035009
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 1-3/8in (35mm) Bore x 3/8in (9mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 20mm x 13mm Insulation Tube Class O 2m (3/4"x1/2" Wall) (120 Metres Per Box)

    20mm x 13mm Insulation Tube Class O 2m (3/4"x1/2" Wall) (120 Metres Per Box)

    KAI020013
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 3/4in (20mm) Bore x 1/2in (13mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 28mm x 9mm Insulation Tube Class O 2m (1 1/8"x3/8" Wall) (124 Metres Per Box)

    28mm x 9mm Insulation Tube Class O 2m (1 1/8"x3/8" Wall) (124 Metres Per Box)

    KAI028009
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 1-1/8in (28mm) Bore x 3/8in (9mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 12mm x 13mm Insulation Tube Class O 2m (1/2"x1/2" Wall) (172 Metres Per Box)

    12mm x 13mm Insulation Tube Class O 2m (1/2"x1/2" Wall) (172 Metres Per Box)

    KAI012013
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 1/2in (12mm) Bore x 1/2in (13mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 22mm x 9mm Insulation Tube Class O 2m (7/8"x3/8" Wall) (156 Metres Per Box)

    22mm x 9mm Insulation Tube Class O 2m (7/8"x3/8" Wall) (156 Metres Per Box)

    KAI022009
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 7/8in (22mm) Bore x 3/8in (9mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 10mm x 13mm Insulation Tube Class O 2m (3/8"x1/2" Wall) (190 Metres Per Box)

    10mm x 13mm Insulation Tube Class O 2m (3/8"x1/2" Wall) (190 Metres Per Box)

    KAI010013
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 3/8in (10mm) Bore x 1/2in (13mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 15mm x 13mm Insulation Tube Class O 2m (5/8"x1/2" Wall) (144 Metres Per Box)

    15mm x 13mm Insulation Tube Class O 2m (5/8"x1/2" Wall) (144 Metres Per Box)

    KAI015013
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 5/8in (15mm) Bore x 1/2in (13mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 20mm x 9mm Insulation Tube Class O 2m (3/4"x3/8" Wall) (160 Metres Per Box)

    20mm x 9mm Insulation Tube Class O 2m (3/4"x3/8" Wall) (160 Metres Per Box)

    KAI020009
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 3/4in (20mm) Bore x 3/8in (9mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 6mm x 13mm Insulation Tube Class O 2m (1/4"x1/2" Wall) (240 Metres Per Box)

    6mm x 13mm Insulation Tube Class O 2m (1/4"x1/2" Wall) (240 Metres Per Box)

    KAI006013
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 1/4in (6mm) Bore x 1/2in (13mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 15mm x 9mm Insulation Tube Class O 2m (5/8"x3/8" Wall) (224 Metres Per Box)

    15mm x 9mm Insulation Tube Class O 2m (5/8"x3/8" Wall) (224 Metres Per Box)

    KAI015009
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 5/8in (15mm) Bore x 3/8in (9mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
    Picture of 12mm x 9mm Insulation Tube Class O 2m (1/2"x3/8" Wall) (264 Metres Per Box)

    12mm x 9mm Insulation Tube Class O 2m (1/2"x3/8" Wall) (264 Metres Per Box)

    KAI012009
    Kaimann Kaiflex ST High Performance Class O Pipe Insulation. Excellent fire resistance and thermal efficiency. 1/2in (12mm) Bore x 3/8in (9mm) Wall. (Price Per Metre - Sold in 2m Lengths) - Black
    Status: In Stock
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