Are there any 1950s radiant floor heat leak repair methods that work on copper pipe?

Thanks for the feedback everyone, in truth that’s pretty much what I figured. It’s a wonderful home but not in what I consider to be the best location if it were going to be our forever home I would jackhammer out the secondary slab and plumbing and pour in a new radiant floor. Too much work though! maybe the next one . Love the car she’s a beaut!
Dan . 👍✌️

Most of these pictures were taken when we first moved in we made quite a few improvements
We remove that absolutely useless cabinet that hung over the counter with the range that opened up the kitchen to the family room also pulled out some strange things someone had installed in the opening between the family room and the dining room also opening that up back to original much more spacious. We have already ordered new luxury Plank vinyl for the family room kitchen dining room etc. leaving the living room carpeted along with the bedrooms and hallway I think I’ll sneak some micro duct down in the walls in each of the rooms to get better heat distribution. The heat now comes from registers in the ceiling which works fine for air-conditioning but not when it comes to heating. If I can gather up the money I think I will go with a geothermal heat pump might even add a pellet stove in the living room between the two return registers it’s nice to have a fire also nice to have one you can control easily on the thermostat. We really fell in love with the design of this house as I said I have some plans that go with it I’m going to keep them in as soon as we find 50 to 100 acres with a year-round river or creek we will build a modern version of the same home accept high-efficiency. facing the right direction all of that.Might get rid of some of the built-in storage to, just doesn’t make any sense in this day and age, pick up some square footage.
The roofs are combination of 4/12 and 5/12 hip roof with one little gable on the west side of the house which provides a good place to mount a yard light to light the entire backyard. Although we are hooked up to city water and sewer we also have a hand dug in lined well for arrogating Man they just don’t make them like they used to! I’m in the process of changing out what’s left of the single pane aluminum frame glass going with mostly thermal pane units glazed right into the wood frames, no metal frame at all just beautiful picture windows! What’s left of these windows are old-style casement. Man I could go on and on but most of these ideas I think are in reserve for the forever home that we will build based on this model! As it sits right now it’s 3015 ft.² more than enough for grandma and me and you had the grandkids over whenever with plenty of room for them to stay. I just purchased A quarter acre panhandle lot that borders my property bringing my total lot size to 1 acre . Room for a duplex for income property and close enough I can keep an eye on it. Well I have rambled on long enough. It’s 2 o’clock in the morning here and can’t sleep so I think I will head into my electronics room my second passion restoring and repairing vintage Stereo electronics and Custom Turntables.
Have a great day solid fuel man ✌🏻