It seems kind of fishy that the seller does not state the size and purpose of this specific selection of apparent gasket material.

What is the thickness of these materials and all your other gaskets

1/8 cork rubber, 1/16 cork rubber, 3/64 Rubber-cellulose sheet, 1/32. Rubber-Fiber sheet ...Sheets themselves are about the size of a sheet of paper 8.5 X 11.5...

Would this work for on top of the rubber seal for a automotive master cylinder?

Thank you for your inquiry. The Fel Pro gasket in the 3060 Gasket Material would not work with brake fluid. Fel Pro does NOT offer a gasket Material that will work with brake fluid.

ASIN	B000CNKUGO
Brand	Fel-Pro
Customer Reviews	4.7 4.7 out of 5 stars (3,238)
Date First Available	November 23, 2005
Exterior	Machined
Is Discontinued By Manufacturer	No
Item Weight	6.1 ounces
Item model number	3060
Manufacturer	FEL-PRO
Manufacturer Part Number	3060
Model	Gasket Making Material
OEM Part Number	3060
Position	Center
Product Dimensions	10 x 2.5 x 2.5 inches

DRiV Fel-Pro Gasket Making Material - 3060 - Mechanic-Grade Sheets for DIY Gasket Repair - Rubber Cellulose Material for Precise Fit Design - Long-Lasting Automotive Repair Accessories - One Size

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