Brakes Siezing

[B Munroe]

Make sure your brake pedal is returning all the way up. If the rod going to the master cylinder doesn't return all the way back the hole in the master cylinder that allows the brake fluid return to and from the reservoir will not be exposed. The brake fluid will heat up and expand. If it has nowhere to go it will push out on the wheel cylinders.
Another issue to look for is if the rubber hoses have started to break down the inside will close up and not allow the fluid to return toward the reservoir.
(I posted the same time as MART above) Good info.