GS#213 High-Temperature Vacuum Bag Sealant Tape for Aerospace Composite Cure Operations

General Sealants GS#213 Off-White High-Temperature Vacuum Bag Sealant Tape is a specialized tacky sealant tape engineered for use in aerospace composite manufacturing and repair vacuum bagging operations. It provides an airtight, leak-free seal between vacuum bag films, breather materials, release films, and tool surfaces during autoclave and oven cure cycles for composite aircraft components.

The high-temperature formulation maintains its sealing performance throughout elevated temperature cure cycles, preventing bag leaks that could compromise the compaction pressure and resin flow required for producing void-free, specification-compliant composite structures. Its consistent tack and conformability ensure reliable sealing on both flat and complex-contoured tool surfaces.

GS#213’s off-white color provides clear visual differentiation from dark tool surfaces and composite materials, making it easy to identify and inspect the seal perimeter before and during cure. The 1/8 x 1/2 x 25 foot roll is a practical size for medium-scale composite repair and manufacturing operations.

Product Specifications

Technical Information

GS#213 is formulated from a high-temperature elastomeric polymer system that maintains tackiness and deformability at ambient temperature for easy application, while retaining its sealing integrity and air-tightness at elevated autoclave and oven cure temperatures. The material does not cure or harden during the composite cure cycle, allowing the vacuum bag assembly to be disassembled and the tape removed cleanly after the cure is complete.

The tape’s conformability allows it to seal complex bag perimeters and follow contoured tool edges without bridging or gapping, which would create leak paths that compromise the vacuum integrity of the bag system. Consistent vacuum integrity throughout the cure cycle is essential for achieving the specified fiber volume fraction, void content, and mechanical properties in cured composite structures.

GS#213 should be applied to a clean, dry tool surface, pressing firmly to eliminate air entrapment beneath the tape. The vacuum bag film is then pressed into the exposed tacky surface of the tape and hand-rolled to ensure complete contact and air-free sealing around the full bag perimeter. Overlapping tape joints at corners should be pressed firmly to prevent leak paths at the overlap.

Why Choose GS#213 Vacuum Bag Tape?

• ✅ High-Temperature Rated — Maintains seal integrity during autoclave cure cycles
• ✅ Reliable Airtight Seal — Prevents vacuum leaks that compromise composite quality
• ✅ Off-White Color — Easy visual inspection of seal integrity
• ✅ Clean Removal — Does not cure or permanently bond during composite cure

Frequently Asked Questions

Q: What is GS#213 vacuum bag sealant tape used for?
A: GS#213 is used to create an airtight seal on vacuum bags used in aerospace composite manufacturing and repair. It seals the bag perimeter to the tool surface to maintain vacuum integrity during autoclave or oven cure cycles.

Q: What is the MPN for GS#213 1/8 x 1/2 x 25?
A: MPN is GS213-1-8X1-1E11-2X25.