Letter 1096

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G'day!

Recently, we've been looking for a new masking product for our surface treatment by plasma. Unfortunately, we can't find a product that correspond to our applications. We used wax for a while but sometimes it melt down during the plasma operation. The new masking product have to withstand temperature of 400 F, absorb vibrations (for our machining operations) and can be applied and stripped easily. It can be a polymer with some masking properties but we think that the best product would be one in which we can dip the part. Any suggestions would be appreciated.

Christian D. [last name & company purged due to age of letter] aircraft mfgr. - Canada --- Hi Chris, Have you tried Super XP2000 from Tolber Div, Pyramid Plastics. Sprays, brushes and dips well. Uses toluene as the carrier. Is somewhat peelable and has excellent resistance to shotpeen and abrasive blasting. It is difficult to get off of rough surfaces. Comes off fairly well with a dip in boiling or hot water. Can be burned off. PWA of USA is using some water soluable material from Malek in SanDiego. Tolber makes a similar product. It is time consuming to apply and PWA is ashing it at 750F to remove. Virtually no VOC and it is nearly indestructable for a maskant. James Watts - Fl 8 OCT 97

You might try using RTV silicones from either Dow Chemical or GE. This material is a two component mixture with different set times depending on what your needs are. It will withstand temperatures to 600 F, and has a very high tensil strength.

Mark E. Puszykowski
Industrial Coating Services, Inc.

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