Non-Solidify No-Leak Built in Mastic Cold Shrink Tube

Product Name:

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:

1. Solidifies without leaking – The built-in mastic slowly solidifies after shrinking, providing reliable flow-sealing without leaking or contaminating equipment.

2. Dual-end inner wall sealing – Both ends of the tube tightly adhere to the cable inner wall, preventing rainwater ingress.

3. Aging & weather resistant – UV-resistant and ozone-resistant materials ensure long service life in harsh outdoor environments.

4. 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.