Electrical Insulating Filler Tape KC78

High tensile strength and bonding strength.
Suitable for irregular shapes cable with good elongation.
Ensuring high quality seal over a wide range of temperatures.
Physical and electrical properties are unaffected by the degree of stretch.
Self-fusing tape.
Good chemical resistance, weather resistance and corrosion resistance.
Excellent ageing properties.
Excellent electrical properties.
Operation and installation easily.

Cotran Brand KC78 Electrical Insulation Filler Tape is a conformable, flexible, self-fusing butyl-based, waterproofing mastic tape. It provides excellent resistance to varying weather, aging, and it also provides excellent adhesion to metals, cable insulations and jacket. This product can be used in sealant as a waterproofing filler for low voltage cable terminations and joints. 


◆ To insulate low-voltage (below 600V) connections.
◆ To build up cable splices and fill out major irregularities and voids in low-voltage splices (below 2300V).
◆ To create a uniform base in irregular cable end for further overwrapping.
◆ To smooth bus bar irregularities.
◆ To be a moisture seal at grounding wire.
◆ To be a sealant with excellent adhesion to cable jackets and other insulating materials.

Test Parameters


Test Item


Test Method










Tensile Strength


ASTM D1000


Elongation at Break


ASTM D1000


Insulation resistance

1.53x1013 Ώ.cm

ASTM D1000


Copper corrosion




Cotran Brand KC78 eletrical insulation filler tape should be applied in successive half-lapped, level-wound layers until desired build-up is reached.

Step 1 Wipe off the dusts on the splice area before wrapping.


Step 2 Remove the liner and stretch the tape to 1 to 2 times of its original length, apply the tape in 50%-lapped with mastic side toward area to the wrapped. Stretching the tape to 4 times of its original length is not recommended.


Step 3 Finish breaking the tape by holding it with your thumb and stick the end well.


Step 4 AfterKC78 electrical insulation filler tape is applied, overwrapping COTRAN PVC insulation tape is recommended, apply 3 layers of COTRAN PVC insulation tape in a 50% overlapping with no tension. Make sure not to overstretch the PVC tape during installation.

Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.
Related products
Battery Water Cold Plate
Energy Storage System Battery Water Cold Plate

◆High production efficiency

◆Good heat exchange effect

◆Large thermal transfer area

◆High performance cost ratio

◆Rapid thermal cooling speed

◆Thin thickness to save space

◆Easy processing and shaping

◆Low leak risk and highsecurity

Shear bolt Connector&Lug
Shear bolt Connector&Lug

The shear bolt connectors are intended for stranded and solid aluminum and copper cable, low voltage and medium voltage up to 36 kV.

They comprise cable areas 10-400 mm² even bigger for sector cable. There is also a screw sleeve for branches up to a total of 100 mm². The joint with the conductor is achieved by the screws in the connector or terminal being tightened to a predetermined torque.

Brazed Water Cooling Sheet
Electric Automobile Power Battery Brazed Water Cooling Sheet

◆Rapid thermal cooling speed

◆Thin thickness to save space

◆Easy processing and shaping

◆Large thermal dissipation area

◆High thermal dissipation effect

◆Flexible runner channel design

◆Excellent welding performance

◆Low leak risk and high security

Nylon Cable Ties
Flexible Black Nylon Self-Locking Cable Ties
Each wire ties own an eye hole in the tail allowing the tie to be attached to a cable or hung from a hook. It is much better than plastic cord organizer ties and you do not need to trim it.

Spacer Tape
Spacer Tape

COTRAN spacer tape is extruded into two crossed threads that can then divert liquids, leading to its wide usage for casting resin joints in different applications, such as Low- and Medium Voltage, Cable Accessories and 2-component epoxy or PUR Cast Resins. It is engineered to build up voids in odd shaped splices and assures full resin coverage and forms a liquid tight mold.

7/16 Straight female Connector
7/16 Straight female Connector for 1-5/8 Flexible RF Cable
Material and Plating Inner Conductor Pin Brass / Silver Plating Inner Conductor Socket Tin Bronze / Silver Plating Insulator TPX Body & Outer Conductor Brass / Trimetal Plating Gasket Silicon Rubber Electrical Specifications Characteristics Impedance 50 Ohm Frequency Range DC~2.7GHz Insulation Resistance ≥5000MΩ Dielectric Withstanding Voltage 4000V rms Operating Voltage 2500V rms Center contact resistance ≤0.4 mΩ Outer contact resistance ≤0.2 mΩ Insertion Loss @DC-2.7 GHz ≤0.10dB VSWR @0.8-1.0 GHz ≤1.10  @1.7-2.7 GHz ≤1.13 PIM3(2*43dBm) ≤-155dBc Environmental & Mechanical Specifications Durability (matings) ≥500 cycles Mechanical Shock Test Method MIL-STD-202, Method 213, Test Condition D Vibration Test Method MIL-STD-202, Meth. 204, Cond. A Temperature Range -65°C to +85°C RoHS Compliant Sealing Class IP68 24hr, 1m, 20℃ Regulatory Compliance / Certification ISO 9001:2015 Compliant The facts and figures contained herein are carefully complied to the best of our knowledge, but they are intended for general informational purposes only.
Moisture Proof Sealing Material KC3000
Moisture Proof Sealing Material KC3000

KC3000 Moisture proof sealing material is widely used for moisture proof sealing in distribution control cabinet, RMU, HV/LV switch cabinet, cable branch box, terminal box, pad-mounted transformer, mechanism operation box, assembly control unit, which has low viscosity, good fluidity and easy penetration, resistant to natural freeze-thaw cycle and all kinds harsh environment, while no deformation, no deterioration, no cracking.

With a variety of metal materials, cable sheath material can be closely bonded and not corroded, but also effectively prevent small animals from underground into the cabinet, reduce safety risks; to realize the closed cabinet moisture proof, prevent cable interlayer or channel from moisture, to provide reliable protection for production and operation equipment.

vinyl-insulating PVC Tape
All-Weather Electrical PVC Tape KC63

◆ High tensile strength.

◆ Flame retardant.

◆ High elongation at break.

◆ The back is rubber pressure-sensitive adhesive with good initial viscosity and bonding strength.

◆ Excellent electrical properties.

◆ Withstand high/low temperature.

◆ Operation and installation easily.

Subscribe to our newsletter and stay up to date with the latest news and deals !

click here to leave a message

Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.