I am having trouble finding a a good electrical shellac to coat my Mag coils with that can withstand a higher heat than 160 degrees. Can someone tell me if they have ever used this product from 3M? Thanks
|3M Scotchkote FD|
2012_Scotchkote_Electrical_Coating_FD_Launch_FlierRev2.pdf (74.8 k)
You could try calling 3M Customer Service at 1-800-245-3573
Its good you are being careful. I purchased a quart of sealant from an electrical winding shop in N. Sacramento and, even though I baked the coil in an oven, it chipped off in use. I was assured the stuff would work on windings in an oil bath but it didn't.
R. V. Anderson uses Glyptol on his mag coils but I guess you already know that.
P.D. George is premium product
Glyptal is probably the easiest to get and use and it's cheap compared to the better industrial motor dip varnishes. Glyptal runs about $40 per quart for the brush-on. The industrial coatings run about 5-6 times that amount. Not worth it for one-time use.
Glyptal 1201 is unaffected by 275 degree oil and will remain solid in oil over 350 degrees for short periods. If your oil is hotter than that, your engine is probably on fire anyway and nothing will help.
Glyptal at $38.99/Qt - http://www.caswellplating.com/restoration-aids/glyptal/glyptal-brush-on-red-enam el-1-quart.html
Richard - Most of the industrial electric motor dip coatings are for non-movable coils. Simply brushing on the dip coatings over wrapped coils will usually lead to the chipping and flaking of the coating. The coils need to be vacuum impregnated so that they become a solid mass.
All good information...Thanks Everyone