Sherwin HM-220 Fluorescent Water-based Penetrant Level 1 (HM-220)

HM-220 is a medium sensitivity, watenwashable fluorescent penetrant, OSHA Class IIIB. Flash point over 200°F. Compiles with low-sulfur and lowhalogen requirements.

Special Features: Bio-degradable; does not contain petroleum distillates, e.g. kerosene and light oils. Meets certain
sewage disposal requirements, and is more likely to be accepted by sewage treatment facilities. HM—220 is free-rinsing and out-performs conventional penetrants on difficult surfaces, e.g. conversion coat surfaces.

HM-220, an approved MIL-I-25135-/AMS-2644 material, qualified tothe requirements of Revision D, without modification!
The Sherwin laboratory was the first to recognize the need for high flash point, highly stable. nonvolatile, low toxicity penetrants.

HM-220 is a proven product with the following advantages.

1. Reliable performance on rough and coated surfaces.
2. Clean, relatively odorless product and vapor-free atmosphere.
3, Accepted as low-toxicity product by health authorities.
4. Bio-degradable; effluent more readily accepted by sewage treatment officials.
5. Excellent electrostatic spray capability.
6. Special feature — does not contain petroleum distillates.
7. Free rinsing — leaves almost zero background, even on difficult surfaces.
8. Use without developers where specifications permit.

HM·220 meets all military and applicable commercial specifications. Full conformance certification documentation complying with MlL-STD-6866, ASTM E-1417 and other applicable specifications are provided with each shipment.

Companion Materials:

Developers
Sherwin D-QOG.1 Dry Powder (form a)
Sherwin D-100 Nonaqueous (form d)
Sherwin D-106 Nonaqueous (form d)
Sherwin D-110A.1 Water Suspendable (form c) equivalent MIL-I-2515/AMS-2644 developers
Removers
Sherwin DR-60 (Class 2)
Sherwin DR—62 (Class 2)equivalent MIL-I-25135/AMS-2644 removers/cleaners

Basic Instructions:
(These instructions describe the basic process, but they may need to be amended by the user to comply with applicable specitications and/or inspection criteria provided by the contracting agency.)

1. Application: Apply HM·220 only lo clean, dry surlaces by spraying, flowing, brushing or dipping.
2. Dwell-Time: A 10 minute dwell time is suggested, although in many cases five minutes will suffice. When particularly tight cracks are suspected, or the pan is especially critical, the dwell time may be extended to 30 minutes, or longer.