High Temp Masking Supply STP9 Silicone Rubber Plugs (5 Pack) – 1.469 x 1.750 in Heat-Resistant Stoppers

Premium high-heat masking plugs for demanding finishes

High Temp Masking Supply STP9 silicone plugs are designed for serious masking work, from powder coating to automotive refinishing. The soft, flexible silicone grips irregular shapes with a snug seal, while staying resilient under heat and solvent exposure. The plugs are color coded for quick identification, and the silicone's color never bleeds or fades, helping your workflow stay organized.

Key features

• Bottom diameter: 1.469 inches; top diameter: 1.750 inches; length: 1.00 inch
• Flexible, durable, and reusable
• Withstands heat up to 600°F (315°C) for 20 minutes
• Versatile for powder coating, painting, plating, anodizing, media blasting
• Premium silicone that resists cracking, shrinking, or breaking over time

Performance and safety notes

The silicone is non-toxic and designed for shop and lab environments. It tolerates common chemicals encountered during finishes and cleaning, making it suitable for repeated use across projects without compromising masking integrity.

Practical uses you might try

• Masking openings on parts during powder coating or painting
• Sealing fixtures or fasteners during plating, anodizing, or media blasting
• Protecting edges and small components during finishing operations

With a 5-pack, you have spare plugs for multiple steps or different projects. The color coding helps you quickly pick the right size for each job, reducing guesswork and cleanup time. Reusability supports efficient workflows and long-term cost savings, while the tough yet flexible silicone resists cracking or tearing on curved surfaces.