Product Name:
Built in Mastic Cold Shrink Tube
Product Introduction:
The Non-Solidify No-Leak Built in Mastic Cold Shrink
Tube is specifically designed for outdoor telecom and CATV
connections requiring permanent waterproofing. During installation,
simply remove the inner core; this Built in Mastic Cold Shrink
Tube automatically shrinks and tightly wraps around connectors
and cable interfaces.
Unlike ordinary sealants, this Built in Mastic Cold Shrink
Tube solidifies without flowing, ensuring reliable sealing
even on irregular connector surfaces. Both ends of the Built
in Mastic Cold Shrink Tube create a tight inner-wall seal,
forming a complete barrier against rainwater. Whether used on 1/2
jumpers, N-type connectors in telecom base stations, or DIN heads
in CATV systems, this Built in Mastic Cold Shrink
Tube delivers long-term insulation and sealing protection.
Every Built in Mastic Cold Shrink Tube passes rigorous
aging and weather resistance tests for harsh outdoor environments.
Another version of this Built in Mastic Cold Shrink Tube is
also ideal for quick repairs of general wire and cable connections
— truly one tube for multiple applications.
Product Applications:
Widely used for:
Waterproof sealing of coaxial cables in telecom base stations
(N-type connectors, 1/2 jumpers, DIN heads)
Sealing of cable TV connectors
Wire and cable connection sealing & insulation
General connector and cable joint protection against moisture
ingress
Key Features:
Solidifies without leaking – The built-in mastic slowly solidifies after shrinking,
providing reliable flow-sealing without leaking or contaminating
equipment.
Dual-end inner wall sealing – Both ends of the tube tightly adhere to the cable inner
wall, preventing rainwater ingress.
Aging & weather resistant – UV-resistant and ozone-resistant materials ensure long service
life in harsh outdoor environments.
parameters:
| Properties | Test Method | Typical Value |
| Color | / | Light grey |
| Ultimate Tensile | ASTM D412-75 | 9.0MPa |
| Ultimate Elongation | ASTM D412-75 | 750% |
| Tear Resistance | ASTM D624C-73 | 30KN/m |
| Fungus Resistance | ASTM G21 28 days exposure | No Growth |
| Dielectric Strength | ASTM D149-75 @1.75 Original | 21KV/m |
| 7days in water at 90℃ | 20.5KV/m |
| Volume resistance | ASTM D257 | 3.4×1015Ohm.cm |
Product pictures:
FAQ:
Q1: What makes this Built in Mastic Cold Shrink Tube different from heat shrink tubing?
A: No heat required. This shrinks automatically by
removing the inner core. The built-in mastic solidifies without
leaking, providing reliable flow sealing for telecom and CATV
connections.
Q2: Can it be used for CATV connectors and general wire splicing?
A: Yes. This works perfectly for CATV connectors, N-type,
DIN heads, 1/2 jumpers, and general wire/cable insulation sealing.
Q3: How does it prevent rainwater ingress?
A: Both ends of this create tight inner-wall sealing against the
cable, blocking rainwater from entering along the connection.
Q4: Does the mastic flow or leak after long-term use?
A: No. It solidifies slowly after shrinking and does not leak or
overflow. That is the key feature of this — reliable
sealing without contamination.
Q5: Is it weather-resistant and long-lasting?
A: Yes. Every is UV-resistant, ozone-resistant, and
aging-resistant, ensuring long service life in outdoor environments
like telecom base stations.
