Heat-Shrink Tubing CellPack SRH2/27-8 (mpn 127419) — adhesive-lined, shrink ratio 2:1, 27 mm diameter

CellPack SRH2/27-8 heat-shrink tubing is an adhesive-lined polymer sleeve engineered for electrical insulation, sealing and mechanical protection of cable joints and connections. With a nominal diameter of 27 mm and a 2:1 shrink ratio, the tubing reduces to half its original diameter when heated, while the inner hot-melt adhesive flows and forms a continuous moisture-resistant seal. The product is intended for use in industrial maintenance, installation and repair tasks where reliable insulation and environmental protection are required.

Advantages

The adhesive-lined construction ensures both electrical insulation and a sealed barrier against moisture and contaminants. A 2:1 shrink ratio provides predictable dimensional reduction for a wide range of cable diameters and joint profiles. The polymer material offers mechanical protection against abrasion and strain, while the melted adhesive fills voids to improve mechanical stability and long-term sealing. The tubing is flexible before and after shrinking, allowing it to conform to irregular shapes and maintain protection under vibration.

Suitable for

• Repairing and insulating damaged cable jackets and splices
• Sealing and protecting terminal connections and solder joints
• Environmental protection for outdoor or industrial cable runs
• Strain relief and mechanical reinforcement of cable transitions

Key specifications

• Shrink ratio: 2:1
• Nominal diameter before shrink: 27 mm
• Adhesive-lined (inner hot-melt sealant)
• Material: heat-shrinkable polymer with inner sealant
• Function: electrical insulation, moisture sealing, mechanical protection

How to use

Select a tubing length that covers the joint or repair with adequate overlap on both sides. Slide the tubing over the cable or splice before making the final connection if possible. Apply uniform heat using a heat gun, hot air tool or other controlled heat source, moving the heat source evenly along the tubing to avoid localized overheating. As temperature rises, the tubing will shrink to its final diameter and the inner adhesive will flow and form a continuous seal. Allow the assembly to cool undisturbed to ensure the adhesive sets and the tubing retains its final shape.

Usage recommendations

For best results, use a calibrated heat gun with temperature control and maintain an even distance while heating. Ensure surfaces are clean and dry before application. Choose tubing length and pre-shrink diameter to provide sufficient overlap; avoid direct flame or excessive localized heat. For outdoor or high-moisture environments, confirm that the adhesive fully wets the cable surface to form a continuous seal.