Tacky Tape® 5MS142 BY Yellow 1/2″ x 1/8″ Vacuum Bag Sealant Tape – 25′ Roll

Tacky Tape 5MS142 BY by Tacky Tape is a professional-grade vacuum bag sealant tape available in 1/2″ x 1/8″ x 25′ Roll format. Designed for use on Vacuum Bags, Composite Layup Tools, Autoclave Processing, it delivers reliable performance, long-lasting adhesion, and protection across a wide range of industrial, commercial, and specialized applications. Yellow in color, this product is trusted by engineers, safety professionals, and maintenance teams worldwide who demand consistent, specification-grade tape performance in every application.

Technical Information

Tacky Tape 5MS142 BY is a yellow, butyl-based vacuum bag sealant tape used in composite manufacturing to create an airtight, vacuum-tight seal between the vacuum bag film and the tool surface or bag itself during vacuum bagging and autoclave curing processes. The tacky, non-curing butyl compound conforms to irregular tool surfaces and bag folds to maintain vacuum integrity throughout the cure cycle. The 1/2″ x 1/8″ cross-section and 25′ roll length are standard for production-scale composite layup operations in aerospace, marine, and sporting goods manufacturing.

Why Choose Tacky Tape 5MS142 BY?

• Butyl Vacuum Sealant — Non-curing, tacky compound maintains airtight vacuum bag seal
• Yellow Color — Standard industry color for vacuum bag sealant tape identification
• 1/2″ x 1/8″ Standard Profile — Industry-standard dimensions for composite layup vacuum bagging
• Conforms to Irregular Surfaces — Flexible butyl seals around tool edges and bag folds
• 25′ Roll Length — Production-scale quantity for composite manufacturing programs

Frequently Asked Questions

Q: What is Tacky Tape 5MS142 BY used for?
A: Tacky Tape 5MS142 BY is used for sealing vacuum bags to tool surfaces in composite manufacturing — for vacuum-assisted resin infusion (VARI), prepreg layup, and autoclave curing processes where an airtight, vacuum-tight bag seal is required throughout the cure cycle.

Q: What is the MPN for Tacky Tape 5MS142 BY Yellow 1/2″ x 1/8″?
A: The Manufacturer Part Number (MPN) is 534211642-BY.

Q: What temperature range does Tacky Tape vacuum sealant work at?
A: Tacky Tape vacuum bag sealant tapes are formulated for composite curing temperatures. Consult the current Tacky Tape 5MS142 datasheet for the specific maximum autoclave temperature rating for your cure cycle.

Q: Does vacuum bag sealant tape bond permanently to tools?
A: No. Vacuum bag sealant tape is designed to be peeled off the tool surface after each cure cycle. It should not cure or cross-link during the process — it remains a tacky, peel-able butyl compound throughout.

Q: Can Tacky Tape 5MS142 be reused between cure cycles?
A: Vacuum bag sealant tape is generally a single-use consumable. Once the vacuum bag is removed after curing, the used sealant tape is discarded and fresh tape is applied for the next layup.