When it comes to masking in high-temperature finishing processes, not all tapes perform at the same level.
Brian AsikFor stability, heat resistance, and clean removal, the go-to material is green polyester tape. Built on a 2 Mil polyester carrier (backing) and paired with a reliable 1.5 Mil silicone adhesive, this tape provides durability in demanding environments such as anodizing, e-coating, plating, powder coating, e-coating, and wet spray finishing.
One of the biggest advantages of this film-like material is its dimensional stability. Unlike thinner or lower-grade masking substrates, this tape resists shrinking, lifting, and curling during long cure cycles. Its stable construction helps maintain crisp, well-defined mask lines even under elevated temperatures.
The silicone adhesive is engineered to remain in place under heat, chemicals, and airflow, and to release cleanly afterward, reducing post-process cleanup time.
Excelling at Protecting Surfaces
In practical use, this tape excels at protecting the surfaces that must remain completely free of coating to maintain electrical, mechanical, or functional integrity. Grounding points, contact pads, threaded holes, machined edges, and precisely milled features all benefit from the tape’s firm hold and clean removal. Whether you’re working with aluminum, steel, or specialty alloys, the tape adheres smoothly without tearing or slivering during demasking.
Another significant benefit is the tape’s versatility. It can be slit to custom widths for streamlined masking workflows or fully converted into die-cut discs, rectangles, donuts, tabs, and custom shapes. These converted formats are especially useful in repetitive production environments where operators need consistent, ready-to-use pieces for masking small geometries or high-volume parts. Not only does this save time, but it also improves accuracy and reduces variability between operators.
Right Balance Between Strength and Flexibility
Across the finishing industry, green polyester tape has become a go-to choice because it strikes the right balance between strength and flexibility. It’s durable enough for heavy-duty applications but still conformable enough to handle tight edges and curved surfaces. Whether you're masking a batch of small precision-machined components or preparing large assemblies for a multi-stage coating process, this tape provides the reliable performance needed to keep operations moving smoothly.
Brian Asik is the senior vice president of Custom Fabricating & Supplies and directs sales, product development, and manufacturing operations. Visit www.customfabricate.com for more information.
