Sealing a concrete water trough

MfMan

Have such a trough with a hairline crack, it's allowing water to seep out very slowly. What's the best way to seal it? Quick set cement or is there a good bonder like Polyfilla etc.? TIA.

leg wax

silacone shower and bath sealant

canon5571

Go to your local hardware store and see if they carry the "sika" range of sealants. They have some serious products for that kind of job.

JohnBoy

given the porous nature of concrete I'm not sure how much success you'll have with a silicone type sealer. I'd nearly be inclined to suggest PVA first, but I'm not sure how that would hold up to constant water exposure, and you dont want something thats gonna disolve back into the drinking water....

leg wax

JohnBoy wrote: »

given the porous nature of concrete I'm not sure how much success you'll have with a silicone type sealer. I'd nearly be inclined to suggest PVA first, but I'm not sure how that would hold up to constant water exposure, and you dont want something thats gonna disolve back into the drinking water....

are u telling me that all those shower trays and shower doors that i have put in over the years are going to fall apart due to exposure to water,better leave the country:D:D:D

JohnBoy

with silicone or pva?

I was referring to PVA, I'm not sure if its intended to be constantly immersed in water.

with the silicone I think water'll soak around it and then out through the crack, something more liquid will get a lot further into the crack.

by all means try the silicone, but I'd have my doubts about its effectiveness for this type of job

jfh

Apologies mods, if opening an old thread is not the done thing? I have a similar issue with few concrete troughs, did anyone else manage to seal cracks in these troughs. Will tec7 do the job?

Sacrolyte

Try cement. No sand

wrangler

MfMan wrote: »

Have such a trough with a hairline crack, it's allowing water to seep out very slowly. What's the best way to seal it? Quick set cement or is there a good bonder like Polyfilla etc.? TIA.

I have a tank sealed with tec 7, I think it says you can use underwater, but I didn't , had to clean the tank anyway

https://tec7.ie/product/tec7-sealant/

MfMan

Crikey, must figure out what happened to the trough ever since I posted the original comment :-)

straight

I sealed one over the winter with whatever leftover silicone/glue i had left in the shed. Scraped the crack with my knife, and plastered the silicone inside and out. Still sealed now after a few months so happy out. Was dirty job seeing it seeping last year.

cute geoge

I have a block built and plastered water trough roughly 500 gal ,it is leeking somewhere can not see would it do to just plaster up again on the inside would the new plaster bond on to the old plaster it is built 36 years

Odelay

cute geoge wrote: »

I have a block built and plastered water trough roughly 500 gal ,it is leeking somewhere can not see would it do to just plaster up again on the inside would the new plaster bond on to the old plaster it is built 36 years

Be difficult to get new plaster to bond correctly.

Could you make a plastic bladder/liner for it?

Who2

Find the spot that’s leaking and mix up sika 4a and straight cement, rub it into the area and all will be sealed. You have about 3-4 minutes before it’s set so if your using your hands don’t arse about or you’ll have a cement hand. It can be got in a lot of hardwares, some may have to order it in but it’s serious stuff. Around 45 euro per gallon. A gallon does a lot.