Intech's Adhesive-Backed Shielding Materials, Explained

Part 1 of a 3-part series on Intech's adhesive-backed radiation shielding. This part covers which material to choose. Part 2 covers facing and mounting options, and Part 3 covers installation and maintenance.

"Adhesive-backed shielding" sounds like one product — peel the liner, stick it down, done. In practice, Intech makes several distinct shielding materials under that umbrella, each built for a different radiation energy range, and picking the wrong one means either overpaying for protection you don't need or under-shielding a source that needed more. This piece walks through the material families and how to match one to your application.

The Energy Range Question Comes First

Before anything else, the deciding factor is the energy of the radiation you're shielding against — measured in kVp for X-ray tubes, or keV for gamma sources. Intech's adhesive-backed lineup splits along that line:

• General-purpose / lower energy — for gamma under 100 keV or X-ray tubes under 160 kVp. This covers most radiology equipment shielding and cabinet X-ray systems used in NDT, food inspection, and security screening.
• Broad-spectrum / high energy — for gamma above 100 keV or X-ray tubes above 180 kVp, including nuclear isotope shielding, 200–600 kVp NDT systems, and linear accelerators.

Using the general-purpose material on a higher-energy source will under-shield it; using broad-spectrum material where general-purpose would do just adds unnecessary cost and weight. Confirming your source's operating energy before ordering is the single most useful thing you can do before choosing a material.

Lead-Free General-Purpose Rubber

This is the workhorse material for radiology equipment shielding and cabinet X-ray systems — a flexible, unskinned rubber sheet, available as adhesive-backed lead-free shielding for gamma and X-ray radiation to 160 kVp, across a wide range of protection levels from 0.25mm Pb equivalent up to 6.4mm Pb equivalent, in thicknesses from under a millimeter up to 16mm for the heaviest ratings. It bonds well to plastics, metals, powder coatings, wood, and primed drywall, and holds up under long-term heat exposure to 200°F.

Lead-Free Broad-Spectrum (High Energy)

Built on the same rubber-matrix approach but formulated for gamma above 100 keV and X-ray tubes above 180 kVp — nuclear isotope shielding, higher-energy NDT, and linear accelerator applications. Available as adhesive-backed lead-free radiation shielding for high-energy, broad-spectrum applications, across a similarly wide range of protection levels from 0.125mm Pb equivalent up to 6.4mm Pb equivalent, sold under Intech's Fortress line. If your application involves isotope shielding or an NDT system running above 200 kVp, this is the family to start from — the general-purpose material isn't rated for that range.

Leaded Vinyl

For applications where traditional leaded material is preferred or required, Intech also offers adhesive-backed leaded vinyl shielding, in protection levels from 0.35mm up to 1.0mm Pb equivalent. It carries the same general-purpose adhesive performance as the lead-free lines, with a smooth vinyl skin finish.
*Contains lead. Follow applicable lead handling and disposal requirements.

FDA Food Contact Compliant Shielding

Food scanner X-ray systems have a requirement the other materials don't need to meet: safe direct contact with food. Intech's FDA food-contact compliant shielding is lead-free, rated at 0.125mm or 0.25mm Pb equivalent, and compliant with FDA 21 CFR 177.600(e)(f) for food-contact materials and 21 CFR 175.125 for the adhesive itself. It's built specifically for application to the steel surfaces inside food scanner X-ray systems, with a distinct royal blue rubber skin finish that also makes it easy to visually distinguish from non-food-rated material during installation.

Choosing By Application

Frequently Asked Questions

How do I know if I need the general-purpose or broad-spectrum material?
It comes down to your source's energy: gamma under 100 keV or X-ray under 160 kVp calls for general-purpose material; above that, broad-spectrum is the right family.

Is the food-contact material as protective as the general-purpose rubber?
At its rated thickness, yes — the FDA compliance is about the material's safety for food contact, not a reduction in shielding performance.

Why would someone choose leaded vinyl over a lead-free option?
Some facilities have an existing qualification, specification, or cost consideration that calls for traditional leaded material. It remains available for that reason, with the standard lead handling and disposal requirements that come with any leaded product.

Can I mix material families on the same project?
Yes — it's common to use food-contact material only where direct food contact occurs, general-purpose rubber elsewhere on the same system, for example.

What if I'm not sure what energy my source operates at?
Your equipment documentation or a qualified health physicist can confirm this. It's worth getting a firm answer before ordering, since it determines which material family is appropriate.

Key Takeaways

• Your source's energy (kVp or keV) determines which material family you need — general-purpose or broad-spectrum.
• General-purpose rubber covers most radiology and cabinet X-ray shielding needs from 0.25mm up to 6.4mm Pb equivalent.
• Broad-spectrum (Fortress) material is required for isotope shielding, higher-energy NDT, and linear accelerators.
• Leaded vinyl remains available for applications that specifically call for traditional lead.
• Food-contact compliant material is a distinct, FDA-rated line for surfaces that touch food directly — not a general substitute for the other families.

Once you know which material fits your application, Part 2 of this series covers the facing and mounting options available for it.

Not sure which material your application needs? Request a quote and tell us your source's energy and application — we'll help match you to the right one.