500°F High-Temperature Glass Cloth Masking Tape

• Click here for the GCT glass cloth tape data sheet.
• Total Thickness: 7 mil
• Temperature Range: -100°F to 500°F
• Typical Uses: Masking for thick powder coating, electrocoating, grit / shot blasting masking, thermal and plasma spray operations, other abrasive environments, solvents, and areas where flame retardent material is required
• Color: White
• Material: Fiberglass
• Adhesive: Silicone-based, pressure sensitive adhesive system
• Adhesion to Steel: 30 oz./inch
• Tensile Strength: 160 lbs/square inch
• Dielectric Strength: 4500 volts
• Excellent resistance to heat, shrinking, and solvents.
• Clean removal, no residue.
• Shelf life: Store at temperatures not to exceed 70°F, with relative humidity less than 50%, and away from direct sources of heat and sunlight. For optimum shelf life, store PSA tapes in an air-conditioned environment or cold storage room below 50°F (Please store tape for at least 12 – 24 hours, at room temperature, before use).

Glass cloth tape with Acrylic Adhesive is also available. Minimum order quantities and additional lead times apply.

All tapes are slit to width at time of order and cannot be returned for refund or credit.
Stock items are subject to availability, but are usually available for shipment within 24 hours.

Contact Us for more information.

• Push down hard! This is a pressure sensitive adhesive tape - pressure is required for it to adhere properly to parts.
• Clean parts thoroughly before applying tape.
• Apply tape to dry surfaces only.
• Tape is for intermittent, one-time use only.
• Store rolls on end in a cool, dry place.
• Shelf life is 12 months from date of purchase.

Frequently Asked Questions (FAQ's) for Glass Cloth Tape

• Q: Can glass cloth tape be used for heavy-grit media blasting? A: Yes. Unlike thinner polyester tapes, our GCT series is made from tightly-woven 5-mil fiberglass that provides exceptional abrasion resistance. It is designed to withstand the impact of grit, shot, and bead blasting without fraying or losing adhesion, making it ideal for protecting machined surfaces during surface prep.
• Q: Will this tape leave adhesive residue on metal parts after a 500°F bake? A: No. Our GCT series features a premium pressure-sensitive silicone adhesive system specifically formulated for clean removal. It removes in one piece even after exposure to continuous temperatures of 500°F, saving your team significant labor time in post-bake cleanup.
• Q: How does glass cloth tape compare to Kapton® (polyimide) tape for powder coating? A: While both are rated for 500°F, glass cloth tape is significantly thicker and more durable. It is the "gold standard" for thick-film powder coating (10–15+ mils) where the cured powder might cause thinner tapes to sliver or tear during removal. Kapton® is typically preferred for fine-line masking or lower-profile requirements.
• Q: Is your glass cloth tape flame retardant? A: Yes. Due to the inherent properties of the woven fiberglass backing and the silicone adhesive, this tape is flame retardant and solvent resistant. This makes it a safe and reliable choice for thermal spray and plasma spray operations in aerospace and industrial environments.
• Q: Can I get this tape in custom widths for specific masking jobs? A: Absolutely. As a converter, Viadon slits all tapes in-house. We can provide precision-slit rolls in any width you require, often with same-day or 24-hour shipping, ensuring you have the exact tool needed for your specific masking application.