1, Application: HM-604 can only be applied to clean, dry surfaces by spraying, flow coating, brush coating or impregnation.

2, Stay time: 10 minutes is recommended, but in many cases, five minutes is enough. When particularly tight cracks are suspected, or parts are particularly critical, the residence time may be extended to 30 minutes or more. Allow the penetrant to drain from the part surface back into the penetrant tank to save material.

3. Remove:

A. Wash HM-604 from the surface of the part with room temperature water. To avoid cleaning the trapped penetrant from surface defects, do not use high water pressure or high temperature, and avoid prolonged cleaning.

B. Use a clean dry rag or towel to remove as much excess penetrant as possible. Wipe off the remaining penetrant film with a rag or towel moistened slightly with solvent. Use minimal solvents; Avoid flushing the penetrant from the defect. When removing excess penetrant, do not spray the solvent directly on the surface of the part. Rough surfaces require more solvent.

4, drying: It is recommended to use a circulating oven no higher than 1600F (710C). Leave the part in the oven long enough to evaporate the surface moisture. Drying is improved by using pressurized air to disperse and remove as much excess water as possible before placing the parts in the oven.

5, development: Use the appropriate developer to apply the developer in the way of cloud, powder, spray or impregnation. Defect marks can be seen almost immediately under a black light, but allow enough development time to improve defect visibility.

6, check: Check the parts under the appropriate UV‑A light intensity and minimum visible light.

The above describes what to pay attention to when using SHERWIN Sherwin penetrant HM-604. In addition, Shenzhen Oudejie Technology specializes in the sale of new imported SHERWIN Sherwin penetrant, and promises to sell products are new imported original, while providing our customers with quotation, selection, product information and other services.