NMW is a medium wall semi-rigid sleeving, available in black 1.2mtr unlined lengths, It comes in a range of sizes up to 230mm diameter. NMW is available in a shrink ratio of typically 3:1 and benefits from the wall thickness where wear resistance and mechanical strength are important.

It is also available with a hot melt adhesive lining NMWA, or with a mastic sealant NMWA(S). These combine the attributes of the unlined material with the benefit of the lining, making it the ideal solution to cable jointing and repairs, both above and below ground where it protects against ingress of moisture, salt water and chlorine attack.

Physical Properties

Shrink ratioTypically 3:1
MaterialCross-linked polyolefin with respective lining where applicable
FlexibilitySemi rigid
ColoursBlack
Tensile strength14.0N/mm”
Ultimate elongation300% min
Relative density1.1 max.
Longitudinal change10% max.

Thermal Properties

Operating temperature range-55°C to + 80°C
Shrinkage temperature>120°C
Storage stabilityVery good

Electrical Properties

Dielectric strength20KV/mm
Volume resistivity10Õ4ohm.cm.

Chemical Properties

Water absorption0.4% (24h at 25°C)
CorrosionNon-corrosive
FlammabilitySelf-extinguishing
(tubing only)

PRODUCT CODE REF.Internal Diameter (mm) Nominal wall thickness (mm) after heating (full recovery)Standard reel size (mtrs)
Expanded As supplied min.Recovered after heating max.
NMW12/312321.2
NMW20/620621.2
NMW25/825821.2
NMW30/10301021.2
NMW34/10341021.2
NMW40/12401221.2
NMW45/13451321.2
NMW54/18541821.2
NMW70/25702521.2
NMW90/3090302.41.2
NMW122/40122402.61.2
NMW170/58170582.81.2
NMW230/772297731.2**

* Please prefix the above numerical reference with NMWA for hot melt adhesive, and NMWA(S) for the mastic sealant.
** Non-standard size available on request.