How to repair cracked concrete driveway?

[davedave]

Hi, I have some long cracks in my driveway - are these suitable to fix myself and if so what products? Or would I be better paying someone to do the job?

[Jewelleryrescue]

Hi @davedave 

Well  You  could simply use cement powder and water into a slurry  (extra  sand wont fit the fine cracks)

I t will fill the cracks as is but is is possible to recrack at a later dated.

Another way is 

Sika 1L High Strength Epoxy Repair Adhesive Concrete Fix Kit

https://www.bunnings.com.au/sika-1l-high-strength-epoxy-repair-adhesive-concrete-fix-kit_p0960347

I/N: 0960347

$60.78

• Convenient kit - just mix and apply
• Excellent adhesion to almost all substrates
• High load capacity
• Shrinkage free hardening

Sika Concrete Fix is an easy to mix and use, 2-component, high-strength, structural, smooth-paste epoxy adhesive comprised of Sikadur-33 Part A and Sikadur-33 Part B.

Sika Concrete Fix can be used as a structural adhesive for:

- Concrete elements
- Hard natural stone
- Ceramics, fibre cement
- Mortar, Bricks, Blocks, Masonry, render etc.
- Steel, Iron, Aluminium
- Wood
- Polyester, Epoxy

Sika Concrete Fix can be used on concrete to:

- Repair corners and edges
- Fill holes and voids

An other cheaper option  is 

Earl's 1kg Concremate Expanding Cement

https://www.bunnings.com.au/earl-s-1kg-concremate-expanding-cement_p0960537

I/N: 0960537

$21

Might need sanding level  with a  stone or brick.

[EricL]

Hello @davedave 

Welcome to the Bunnings Workshop community. It's wonderful to have you join us, and thanks for sharing your question about filling the cracks on your driveway.

It's great that you've received good advice from @Jewelleryrescue. Just to add to the suggestions made, I recommend using Gripset Betta 1L Concrete Crack Filler. Since the cracks are not very big this filler should sit in nicely between the cracks of the concrete. Please make sure to clean in between the concrete cracks before applying the filler. 

Please make sure to wear personal protection such as gloves and goggles when working on your project.

If you have any other questions we can help with, please let us know.

Eric

[Kevbo]

I have the same cracks. Im thinking of using the Sika High Strength Epoxy as our driveway is used multiple times a day. 

Did you use this product and how were the results?

Will it also work where the concrete crack is going down the side of the base like in my photo?

 

 

[MitchellMc]

Welcome to the Bunnings Workshop community @Kevbo. It's fantastic to have you join us, and many thanks for your question about epoxy fillers.

Let me tag @davedave so they are alerted to your question.

Sika High Strength Epoxy is an excellent product for high-traffic areas like your driveway due to its durability. However, being a two-part epoxy, it can be tricky to apply and doesn't leave much room for error. You’ll need to work carefully and follow the instructions closely.

For cracks running down the side of the concrete base, it should still work effectively, as epoxy can bond well to vertical surfaces. Just ensure the crack is properly cleaned and prepped before application to get the best results. Keep in mind, though, that while epoxy will fill and strengthen the crack, it won’t stop future cracking caused by movement in the slab.

If you plan to paint over the area later, that could be an issue with epoxy as it may not adhere as well as a cement-based filler would. If painting is in your future plans, you might want to consider using the Gripset Betta 1L Concrete Crack Filler.

Please let me know if you have any questions.

Mitchell
 

[approachmhn]

@MitchellMc @EricL  my concrete verandah is leaking under as seen in attached pics. 
I had sealed it with Marine sealant https://www.bunnings.com.au/selle ys-410g-black-marineflex-sealant-black_p1230182 in August and there was no leak.

But yesterday when it rained, I see it is leaking again.

looks like due to dry period for more than 2 weeks with no rain and hot weather, sealant has given up.

By the way, water stands in this area when it rains.

can you please suggest a solution?

I am planning to go with concremate (https://www.bunnings.com.au/earl-s-4kg-concremate-expanding-cement_p0960538?referrer=RetailApp&utm_s...).

Is it good?

thank you.

 

 

 

[EricL]

Hello @approachmhn 

Thanks for sharing your question about your concrete veranda. I propose digging out all of the old sealant you've placed into the gap and cleaning it as best you can. Once the gap is clean, I suggest using Earl's 1kg Concremate Expanding Cement. Once the cement cures, I suggest putting on CPC 1L Shower Plug Sealant on the entire area. This should seal up any possible leaks you might have on the surface of your veranda. 

Let me call on our experienced members @Dave-1 and @Nailbag for their recommendations.

If you need further assistance, please let me know.

Eric

[approachmhn]

Thank you @EricL .

 
Sure. I will do as suggested.

can I apply concremate even if rain is forecasted in 2-3 hours?

Verandah is painted in charcoal colour. 

So, is it ok to paint after putting on  CPC 1L Shower Plug Sealant ?

Thanks.

[EricL]

Hi @approachmhn 

Thanks for that added information regarding your verandah. Since the surface is covered in paint, I suggest sealing only the area where you have put in Earl's expanding concrete. In regards to the application of Concremate, if the forecast is rain in 2 to 3 hours it's best to postpone the application until you get some good weather.

If you need further assistance, please let us know.

Eric

[Dave-1]

Good Evening @approachmhn 

With the leak area underneath have you traced it back to the sealant? Im just making sure its not coming from somewhere else before you pull up the old sealant. Water has a funny way of traveling sometimes.

Dave