Alro logo Alro Steel was established in 1948 by Al and Robert Glick. Today, Alro is comprised of Alro Steel, Alro Metals, Alro Plastics and Alro Metals Outlet.

Alro Plastics Product: Hydex® 4101 UD Blue

Size and Availability:

Sheet / Slab stock:
- Thickness: 3/4”thick and 1” thick
- Sheet sizes: 24”x 48” (standard)
- Standard color: Food Grade Blue

Rod / Round Stock:
- Diameter: 1”, 1-1/2”, 2” and 3” diameter
- Rod lengths: 10 foot (standard)
- Standard colors: Food Grade Blue

Hydex® 4101 UD Blue has been specifically designed for the demanding environment of the food processing industry. For several years, the industry has been moving towards materials used in equipment design that are detectable in some way; either visually, by metal or x-ray detection, in order to improve food safety, and reduce the possibility of product contamination. Hydex® 4101 UD Blue offers visibility for all three detection types with one material. The product’s specially formulated fillers are detectable to both x-ray and metal detection systems, and its blue coloration is visible to optical inspection systems.

In addition, as part of the polyester family, HYDEX® 4101 UD Blue exhibits the very good physical properties typical of the family, as well as excellent resistance to chlorine and caustic cleaning solutions.


  • Resistant to cleaning chemicals
  • Food Grade blue for optical detection
  • Metal detectable and X-ray opaque
  • Good impact strength
  • Good dimensional stability


  • Food processing pump impellers
  • Filler valve parts
  • Food forming plates