High Temperature Resistant Vacuum Bagging Sealant Tape

High Temperature Resistant Vacuum Bagging Sealant Tape 

Vacuum bagging sealant tape is a butyl based formulation modified with heat stable polymers. It handles ramp soak profiles from 120°C to 180°C without bleeding or hardening. Unlike cheap alternatives, this vacuum bagging butyl tape keeps its conformability during autoclave and oven curing, so you don’t get vacuum drops midway through a cycle. Two other related keywords you’ll see in practice: high temp sealant cord, vacuum integrity tape. The material leaves no greasy residue on molds or bagging film, which saves cleaning steps between layups.

Technical Specifications

Key Advantages

• Remains flexible and tacky from 120°C up to 180°C – no embrittlement.
• No silicone, no solvents – safe for prepreg and secondary bonding.
• Peels off cleanly from steel, aluminium, and composite tools.
• Works with nylon, polyester, and PTFE release films without sticking.
• Resists edge tearing when you pull bagging film tensioned.

Product Packing & Shipping

Each roll on a cardboard core, 14-20rolls per outer carton.

Shipped as non dangerous goods. No refrigeration needed.

How to Use

• Wipe the tool flange with a clean cloth – no release agent on the sealant area.
• Apply tape along the vacuum path, pressing gently with fingers.
• Do not stretch the tape; lay it naturally.
• Position the bagging film over the tape, then press the film down starting from one corner.
• Use a roller or thumb to eliminate air channels.
• Pull vacuum and check with a leak detector before heating.

Applications

• Aerospace composite parts (autoclave cure, 120–180°C cycles)
• Wind turbine blade root and shear web bonding (oven cure)
• High temperature epoxy and BMI prepreg lay ups
• Marine and automotive carbon fibre components (out of autoclave with oven post cure)

FAQs

Q: Can this vacuum bagging sealant tape handle 180°C for a full 4 hour soak?
A: Yes, we’ve tested it at 180°C for 4 hours – vacuum held below 1 mbar. Slight softening occurs but no runny residue.

Q: What’s the difference between your 150°C and 180°C grades?
A: Same base tape, but the 180°C version need vulcanized rubber , For most wind blade work, 150°C grade is sufficient.

Q: Does it stick to bagging film after cooling?
A: No, it releases easily at room temperature. If it feels sticky, dust a little talc.

Q: Can I splice two pieces together?
A: Yes – overlap ends by 5–10 mm and press firmly. No separate adhesive needed.

Why Choose Us

Senping manufacture this vacuum bagging sealant tape in house with batch to batch tracking. Our compounding line is dedicated to high temperature sealants – we don’t switch between low temp and high temp formulas on the same shift, so cross contamination never happens. Over the last 10 years, we’ve supplied over 50*40’HQ container to customers worldwide without a single leak related claim. Short lead time: 5–7 days for standard stock.