Argh! Frustrated by indecision!

This is a quick question which I’m sure will be swiftly answered by anyone who is not as clueless as I am.

The scenario is thus: My washing machine has saturated the concrete floor in my kitchen and rotted away a floorboard that was next to the concrete. I have removed the washer and I’m thoroughly drying the area. My intention is to put a waterproof coating on the concrete then replace the floorboard. The chap at B&Q agreed and directed me to a hefty can of Thompson’s One Coat Water Seal Ultra to use on the concrete floor.

However, on getting it home and reading the instructions I found it said:
“FOR EXTERIOR USE ONLY. Do not use on ponds, roofs, garden retaining walls, below ground and damp proof membranes or where positive water pressure in likely.”

So my question is basically: does this matter? I’m just trying to stop water from kitchen splashes or future washing machine disasters wreaking my kitchen? Maybe I should be using something else or nothing at all.

I’m leaning towards using it, but I could do with some reassurance.

You could use K11 tanking slurry. You can get it for as little at £25 a tub. I used it on my walls to waterproof my basement. I know some have used it for ponds etc...

If you follow the instructions on the tub properly you can even paint or render over it.

Why mess about, just go for the big boyz stuff.

The leak must have been there for a good while.....!
See the leak doesn't happen again, replace the timber and leave it alone would be my advice.
Waterseal is great for porous brickwork and may cast water from the concrete for a short while but it doesn't stop rising damp, and wont deal with leaks.
John

Burnerman said:

The leak must have been there for a good while.....!
See the leak doesn't happen again, replace the timber and leave it alone would be my advice.
Waterseal is great for porous brickwork and may cast water from the concrete for a short while but it doesn't stop rising damp, and wont deal with leaks.
John

Click to expand...

Yes, the leak was long term and very small. Basically there was no vinyl under the washer and when it leaked in ran down to the floorboard and soaked into it, rotted it away, and then the water kept going down the hole.
Do you think I should just dry everything out, replace the floor board and put down vinyl so I can see future problems straight away?

Yep, I do......the concrete floor wont come to any harm, obviously any timber does (especially chipboard which you often find on floors).
Do keep an eye out for future leaks, of course - its dead easy to be caught out, but you wont be too popular if you live in an upstairs flat for example
John