Bostik Cementone Waterproof Rapid Setting Cement

I bought this as we had 2 small holes around the edges of the deep kitchen drain which was discovered by the professional who came to unblock it. He said we needed to get it repaired to prevent the waste water damaging our foundations. I mixed up a small quantity of the mixture in an old plastic pot and stirred it with an old gardening knife. It mixed up like icing sugar. I got it to a stiff consistency and filled up the gaps. To ensure it dried I used a hairdryer on it for a while, and did not use the drain for a couple of hours. The product is very easy to use, and as I wore plastic gloves made no mess. I never bother to check sizes and assumed when I ordered the product it would come in a small pot. The container is huge, and I could hardly lift it. I will embark on further filling on the garden path , weather permitting, and will offer some to my neighbour as she may wish to use some. This is a truly excellent product, easy to use, and very good value.

The patio at the side of the house was laid badly where the motar was not of recommended mix during the winter months. Unknown to us it was virtuyally all sand with only a skim of cement mixture at very top. Therefore needed scoop it all out and re-point with proper mixture of cement & motar. Instead of using standard pack of 25kg cement at <£5, decided to use this as it is pre-mixed (but not ready-mixed; the user has to add water). By chance I ordered 3. This allowed most of the first bucket to be put into buckets 2 and 3 and leave 1kg or 2 kg in the first bucket with which to mix in some water. For the task above I could only manage to dig out on average 5 feet of old material between the slabs then re-point using this Bostik cement. This Bostik is expensive as compared to standard bag of cement but it is quick setting; strong enough for me to step on the slabs the next day to continue the task of repointing the other slabs. I have also a bucket of Blue Circle Extra Quck Setting cement, which is even more expensive, but which proved to be too quick setting for me to use - a professional brick layer may be proficiently fast to use that Blue Circle Extra Quick cement. I must also say it is mostly cement rather than a motar mixture. Also, depended how (quick or much) you use it, I could only use 1-2 kg at a time, some parts have dried white in colour, some sandy white, some light grey. At the moment noticed it tended to be sandy white from material at the bottom of the bucket - assuming heavier sand sunk to the bottom than the cement p;owder which stayed at the top of the bucket. After comparing with rest of the available versions of cement and different brands, conclusion is it may be expensive but fair as compared to standard and Extra Quick cement. It is also convenient to use; it is quick enough for me to continue work next day but slow enough for my lack of builders' skills (I am better at carpentry). More importantly, during this continued pandemic times, this remains available some of the time whereas standard bags of cement is like gold dust for their non-availability. Update. Been doing the pation repairs for a month or two for the past 4 years. The repairs I made in 2021 were done around October. Maybe the the cold night temperatures when it dropped to single figures, say 5 degrees or less, and with damp was the reason why the repairs did not last well; cracks in my handiwork showed up within a few months. (Yes it could also be my inexperience too). I am wondering if the freezing at night (expansion by ice ???) was the cause, but don't know for sure. It could also be that the locations were the worse parts of the patio so settled unevenly as we walked on it. Anyway, with these suspicions in mind, the repairs I made in 2025 were done from late August to last week of September, where the night temperatures were definitely no less than 8 degrees (according to Met Office forecast). Lo and behold, with all the rain of winter 25-26 and some freezing nights, no crack have yet shown themselves among the repairs made in 2025. (That's 6 months of the worse weather thrown at it.) Ergo, lesson learnt is, if there is a choice of wether conditions to do the repairs, select mild + dry days and nights. Another thing I discovered was that the "professional" patio layer short changed us. Didn't know that was possible until discovering there is way too low and insufficient sand below the Indian Sandstone slabs. This is another reason to use this Bostik as I was hoping by forcing as much as possible of this Bostik down into the gaps between the stones, some of it might go sideways when it reached underneath the stones to support them otherwise it would be a mega job to rip everything up to put more sand down before re-laying. So, apart from the repairs in 2021, all the subsequent years' efforts have held. (Yes it has been slow but it's not sensible to force the pace either because for each slab, one could only clear out one edge out of 4 edges at a time so as not to destabilise it entirely; hence could only repair one edge here and another edge of another slab a few slabs away etc. To repair one slab, it takes 8 days before it could be walked upon; one day per edge to be worked, a day between to dry secure.... so on.)) Now I am raising the score to 5 stars as I believe this is a good product for a DIY'er (after gaining a bit of experience of using it).

Bostik Cementone Rapid Setting Cement is a quick and convenient solution for various cementing projects. This cement offers rapid setting times, allowing for faster completion of tasks. It is easy to mix and apply, making it suitable for both professionals and DIY enthusiasts. One of the notable features of this cement is its fast setting time. It quickly hardens, which is beneficial for time-sensitive projects or situations where you need a quick fix. It also provides good initial strength, ensuring a solid bond once it sets. The cement's versatility is another advantage. It can be used for a wide range of applications, such as patching cracks in concrete, setting fence posts, or repairing damaged surfaces. Its durability and resistance to water make it suitable for both interior and exterior projects. However, it's worth noting that the rapid setting nature of this cement leaves less time for adjustments or corrections. Once it starts to set, it becomes difficult to manipulate or reposition. Additionally, the rapid setting time can be a disadvantage if you require more working time or have complex projects that demand precise adjustments. Overall, Bostik Cementone Rapid Setting Cement is a reliable option for quick cementing needs. Its fast setting time and versatility make it a convenient choice, but it may not be suitable for projects that require extended working time or intricate adjustments.

The product was first class and have no problem at all with it including the bucket and lid are strong and sturdy with a handle to take the 10kg quick setting cement within however the delivery packaging of a cardboard box with no indication of the way up to keep it in transit and to take care in not to throw it around ends up with the contents leaking out within the box when opening.whould it not be better to put these types of products in a paper sack with the handle pertruding at the top for transit just an observation

Good job. Easy to use.

Great product but sets very quickly!! Only mix small batches unless you are the fastest brick layer in town!!

Good concrete to do small jobs

Great product. Easy to use and solid once dry. I bought this to fill some cracks and holes on a doorstep. The repairs varied, with some being quite deep holes and others just thinner surface cracks. The cement was simple to mix and ready to use within seconds. Once in position, the instructions said it would set in 20 minutes. In reality, it took a bit longer, even on the more shallow areas, but after about 40 minutes to an hour it was solid and ready to be sealed and painted. If you don’t need the full tub in one go, I’d recommend mixing in a separate container so you can keep the rest for later. The cement has now been in place for over three weeks and it seems strong and durable.

Ce n’est pas très pratique. Il est impossible de mélanger tout le ciment à l’eau sauf à utiliser un mélangeur mécanique. Et la prise est très rapide.