Child Item

How to seal cracked retaining wall?

Products to seal this retainer wall.

Hello, moisture wall readings are high in one area of the room that’s on the other side of this wall.

Can you help with any suggestions to cement successfully so there is no longer a crack along the edge/that might last longer than the last effort to repair.

I would raise the level of the cement along the edge about an inch

I’m keen to then seal from the wall to about a 30cm into the limestone wall.

Thankyou for your help.

Bob

Find more posts tagged with

Tools and Materials

Repairing

Comments

Jewelleryrescue

Hi @bob11

There is a perfect product designed for your purpose that they use to glue those pop up prefabricated factories with .

This polymere is 35% stretchable water proof . It is a little more expensive but not by much as it will last a life time applied well.

You will not need to do any other work when this is applied and affixed to the wall and the drive

I would high pressure wash the gap first and let it dry (bone dry)

Make sure you get the extra wide free applicator tube to screw on to the cartridge .

I suggest use white as other colurs sit on the shelves longer and are harder to use not fresh. Dirt will soon make it off white color,

So use a caulking gun . Cut the nozzle 45 degrees with a large opening as you have a large gap to fill.

Fill all along the house cement join line the idea is a good bond onto both house and cement,

Some times this stuff gives me trouble wanting to seal on to the substrates so the only solution is to use a gloved hand and push the sealant onto the wall and the drive way and extra filling any gaps that appear.

Thats why I think some of this stuff older but once its on it will stay on never had a failure yet.

Remember you already repaired this now lets do it better.

Sika 310ml White Sikaflex Pro+ Polyurethane Sealant - 310ml White I/N: 0083587 $24^.03

Polyurethanes sealer

MitchellMc

Welcome to the Bunnings Workshop community @bob11. It's amazing to have you join us, and many thanks for your question about sealing a crack.

I agree with @Jewelleryrescue that sealing any cracks along the wall is a good first step in addressing the issue. The product he recommended, Sika Sikaflex Pro+ Polyurethane Sealant, would work well for this purpose. It’s a durable, waterproof sealant that can provide a long-lasting bond. As mentioned, ensure the area is clean and dry before application, and use a wide applicator tube to ensure proper filling of the gap.

However, given that the wall is covered by soil and moisture readings are high on the other side of the wall, there could be an underlying issue with the dampness. The slope of the ground and potential exposure to water could be contributing to moisture entering the wall. If the waterproofing on the wall has been compromised, that could be a key factor in the ongoing dampness.

To further protect the wall, you might consider waterproofing the interior of the wall to combat the dampness. If full waterproofing isn’t feasible, Crommelins Aquablock could be an option to seal the wall from the inside. This combined approach—sealing the exterior cracks and addressing the internal waterproofing—should help improve the situation and provide a more long-lasting solution.

Please let me know if you have any questions.

Mitchell

bob11

https://www.workshop.bunnings.com.au/discussion/comment/46582#Comment_46582

Thankyou for your very helpful reply, I'll clean the joint and apply the way you recommended, cheers.

Bob

bob11

https://www.workshop.bunnings.com.au/discussion/comment/46649#Comment_46649

Thanks Mitchell for your reply, the teamwork in helping me progress this problem has been great. After applying the Sikaflex pro + to the edge nice and thick, I would like to seal the cement joints between the limestone for about a meter from wall, the commelin exterior grade will be fine where it meets the Sikaflex/won't compromise the sikaflex? This looks to be grey, could there be a clear seal I could use ?

(I'll also work on the internal wall and the water flow above the retainer wall)

Cheers

Bob

MitchellMc

https://www.workshop.bunnings.com.au/discussion/comment/85422#Comment_85422

Hi @bob11,

I'm not aware of a clear sealant. However, you'll find that only a minimum amount of water will actually penetrate and passthrough the actual limestone. I'd be much more concerned with using cement or the Sikaflex to fill and fix the cracks in the cement joints. The Crommelin product might not be thick enough to do this. I'd fill the larger cracks with cement or sikaflex and then when dry go over all the joints with the Crommelins product.

Mitchell

Jewelleryrescue

https://www.workshop.bunnings.com.au/discussion/comment/107893#Comment_107893

Hi @bob11

My experiance with wet spots and water issues are fix the known issues first ie the cracks along the wall and 9 out of 10 times the wet spot will dry up. . It looks like key water entry point it almost looks like mini drain way once that sealled see what happens only other option is to dig out that whole wall section and seal the wall from the outside and that $$$$ and a big effort.

Double check the crommlins product states UV safe Outdoor use doesn't automatically mean UV stable,

Child Item