Help! Remove bonded granite surface

[speccy]

We have a bonded stone sill here and I need to remove it to get to get to a leak. I've tried hammering it with a plastic block it's really solid.
Can I use some softener to soften the caulk or resin?
As you can see there is a lip where it overhangs the vertical and I've tried hitting hard with block and mallet it's solid. I fear I'll end up cracking it.

Any help appreciated

 

[Dangee]

I did one yesterday. Use a scraper or thin trowel & gradually slide it further in. Lift evenly & gradually.

 

[speccy]

Ok thankyou was this a resin or? I was told this is stuck solid with some rock hard expoxy

 

[Dangee]

If it’s a brittle adhesive, once it’s loose it’ll come up easily, flexible agents can be harder work. Just take time, use something thin, flat but strong. In the picture you can see what I used. Don’t use a screw driver or chisel as it will chip or crack.

 

[conny]

As Dangee says, a chisel/screwdriver, or indeed, anything which is more than the thickness of a scraper is going to exert high pressure at a single point. The stress at that point will cause a crack or even clearly break it.
Patience and time is the key, especially when you think you are nearing the end of the job.
Slowly, slowly, catchee monkey.

 

[speccy]

If it’s a brittle adhesive, once it’s loose it’ll come up easily, flexible agents can be harder work. Just take time, use something thin, flat but strong. In the picture you can see what I used. Don’t use a screw driver or chisel as it will chip or crack.

Dangee thankyou so much for inspiring me to persist. I got it off in the end as you say with gentle persuasion and alot of determination. Took some time though! My next challenge is tightening the leaking compression joint.

Anyone know of a specialist ring spanner. I think I'll need to chip the wall away yes.

 

[speccy]

Here is a pic of leaking compression joint I guess I need to tighten somehow

 

[Dangee]

I’m a heating engineer/ plumber.
Personally, I’d probably shut off the water, loosen the nut , ptfe or lsx on the pipe against the olive (the side that compress’s against the valve) reconnect & test. You could try a “stubby” handled adjustable spanner or a basin wrench.

 

[Dangee]

Well done for doing it though! When you put the top back, don’t stick it down, just silicone the visible perimeter.

 

[speccy]

Ooh a basin wrench because nothing else fits or I angle grind this ring spanner.

 

[Dangee]

You might be better calling someone though. Is it on a 3 hole mixer? (Hot valve, cold valve & spout in the middle?) When tightening it, you need to make sure you hold the valve ridged in position, don’t let it move or distort the joints downstream.

 

[Dangee]

 

[speccy]

Oh **** I've never seen this it wasn't a lose compression I feel exonerated but never seen this!!!!

Can you see the small jets of water coming out of the brass corner

 

[Dangee]

Yeah, but now you’ve got to try & identity & source the valve. It needs changing.

 

[speccy]

Yes hopefully as this is my ensuite so I bought about a year ago.
Sods fking law of all the plumbing I've ever done rarely ever leaked. First bad leak had to be the worse place and worst thing to replace oh well. But I'm pleased it wasn't my plumbing just a **** valve.

Thanks again for your help and advice matey so appreciated. Have a fab evening.