skip to Main Content

concrete mixes - Choose which concrete mix is best for what you want to make

I know what it’s like standing at the concrete aisle and getting that odd look from the guys at the building supply store… Since I get a lot of questions about which concrete to use I’m going to eliminate some of the guesswork. Follow me as I Compare Concrete Mixes for Crafting

So many Concrete Mixes for Crafting:

I remember many years ago when I started buying concrete, I’d stand there reading and checking the packages, looking quite puzzled, and then someone would think I was sent by my husband to buy ‘normal’ concrete. After a few attempts of trying to explain what I wanted to do I would just buy what I felt was right since they usually thought I was a bit crazy… Even nowadays there are so many that it’s quite daunting.

I knew what I did not want; large aggregate in my mix, which is what the regular Concrete mixes have. They are quite cheap and can work for large pours in large molds or sidewalks. I am usually making small things that were going to be cast in molds or hand shaped for decorative home use.

‘Leaf-casting’ was perfect to make my Concrete crafting tests since I like to work quite thin. These leaves are my new favourite; Savoy Cabbage!

Working Fast:

Since time is always short around my place so I like to see my projects finish quickly and I am constantly improving or redesigning so I can’t wait weeks or even days!

I really do love the ‘fast set’ mixes but am not exactly sure about what makes them so quick and also so much stronger. There are special additives in the concrete mix resulting in a dense less porous finish. With that comes quite a hike in price, but it’s worth it in my eyes!

Rapidset Cementall:

The above Rapidset Cementall is probably my all-time favourite!  The specs say that it can be used at different consistencies and it will cure much harder than regular concrete. I am sure there are additives like polymers for strength and those also make it quite moldable at a thicker consistency. I learn by testing and it has worked well for many of my projects. Usually readers who have had concrete problems it’s because of the choice of concrete.

Rapidset Cementall Concrete Mix will start to thicken in about 30 seconds and can usually be taken out of the mold after 1 hour. The molds that I make are quite stiff and this mix will withstand the vigor needed to sometimes take them out. This mix is super fine, will pick up all the details and provide a super smooth white finish. It will be even be shiny when the mold is also shiny material.

So Strong:

At a thin consistency it will be easily poured such as the Coasters and the Monster Eggs. The strength achieved in a thin wall is quite amazing!

When reading the specs for different mixes it will give you a clue at how it can/should be used. ‘Featheredge’ means that it can be used at a very thin layer. Some mixes will state not to be used above a certain thickness.

The Rapidset Cementall can also be used at a thick; sculptable consistency. It will still slump ( a high pile of mix will flatten and sag) but not usually run away. That makes it work well for leaf casting such as the Lacy Circle the Smiling Stones. The workflow can be quite fast since sections harden quickly allowing more material to be added such as around an Orb or a Face sculpture. Dampening the drier sections is good practice before adhering new mix.

Quikrete Fastset All-crete:

Different brands offer similar products. Since entering the Quikrete contest I wanted to use a Quikrete product that compared to the RapidSet Cementall. I find this mix is almost exactly like it. It does seem like it comes under a few different names; Dual Purpose Grout & Structural RepairFastset Repair Mortar and Quikrete Fastset All-Crete. (See a selector guide here) It may be a difference of countries (here in Canada) Do NOT confuse it with any regular Fastset Mix though, as it will have large aggregate in it. If it says that it is meant to make sidewalks and post foundations that is usually the indication.

It has much of the same qualities, workability and also stated it can be used at all kinds of consistencies. It also a fine powder but the colour is more like a true concrete ‘grey’.

A new huge 20″ Orb will be posted soon and it used this mix. It performed well at less than 1/2″ thick and quick-setting allowed great workflow.

Quikrete Vinyl Concrete Patcher:

If you can wait a bit longer but still want strength then the Vinyl Patch products will also work well. Quikrete Vinyl Concrete Patcher also has additives to make it really strong but does not set as fast. It has a window of 30 minutes of work time (conditions can affect it) and will be hard in 24 hours. It has good bonding abilities so layering works great as in Giant Orb making.

You can see it still is a fine mix but I’d say it feels a bit more sandy. It cures to a similar concrete colour to the Fastset. You can see a slight bit more texture in the final product.

Sakrete Top’n Bond:

This is another of the bonding mixes with great strength and it performs very much like the Quikrete Vinyl Patch. Sakrete Top’n Bond will work for the continuous building around an orb or casting of thin leaves. It will set in a day as well.

My 20″ Giant Orbs have lasted well through the canadian winters and are light enough to carry with one hand. Amazingly only 1/4″ thick. Stomping on it would likely break it but they are really ornamental garden sculpture.

So, there you have 3 direct comparisons (left to right) Quikrete Fastset Allcrete, Rapidset Cementall, and Quikrete Vinyl Concrete Patcher. This is by no way the only available mixes but it does give me quite the selection to get my concrete crafts done.

If you are still a bit apprehensive about working with concrete visit my tips post as it does not mean that you need to be ‘covered in concrete’ to make some easy treasures! Crafting with concrete is like making a cake mix that does not need baking… And you can keep it forever!

 

barbmaker

I'm an artist & I make things... all kinds of things.

This Post Has 14 Comments
  1. Hi I am in the process of making a mold for melting lead into for fishing weights I have used the fire cement they use in setting fireplaces it works but not the best as it breaks up after a couple of uses. Do you know of or can recomned some mix or make of cement that would be suitable for me to use.
    Michael

    1. I’d say that you are using the mortar mix? I don’t think lead gets that terribly hot as other metals and cools pretty quickly. I bet (but am not sure) that the Rapidset cementall could work since I find it ‘crazy strong’ for a concrete mix. You can cast it a bit thicker to ensure that it can dissipate the heat quickly. I think the problem is if there is moisture in the mold, so make sure it is REALLY dry. I do wonder how you get the lead out though? The rapidset cementall is very smooth if used with a smooth object to mold from. Dumb question; silicone molds don’t work? (saw some on youtube)

  2. Can you please help? I tried to make a concrete pot this weekend but when i took it out it crumbled in my hands. What is the sand to cement ratio? I cant get the ratio right. Please help. I am from Rep of South Africa. We dont have the same products as you.

    1. It would help me if I knew what ratio your used. It may also be that it cured too fast. Keeping it damp will help strengthen the concrete as it cures as well. The ratio for mortar is 1 part portland cement to 3 parts sand. Slight more cement will make it stronger as will some acrylic additive. If you add some fibres that will strengthen as well. My bowls are made with a sand topping mix.

      hope that helps

  3. Good day Barbmaker.

    I want to attempt my first try to make something out of concrete.

    I have had this idea for a long time now and have been searching for information and the what and how’s for a long time now.

    I want to make Hands but the arm should be a little longer than what we usually see in pictures. I want to make a few as i want to set them up in my garden in a specific corner. So these hands must stand with the hand pointing upwards.

    Do you think those long, thick, garden gloves will work for such a project. Also, will it not be a problem to cut the rubber loose from the concrete after it has set?

    I would appreciate your advice.

    Thanking you

    Anneke

    1. Haha, I have tried the rubber-gloves-concrete-hands. It did not go so well. You need to consider that the rubber needs to be pulled out from between the fingers so any really close fingers is a problem. IF I did it again I’d use really strong mix like the RapidSet Cementall as I had the fingers break when I used hypertufa. (I hate waiting eons for it to set) So that may have been the problem.

      If you want a REALLY cool result you could do some life-casting with alginate… I LOVE how much detail you can get! But unless you make a mold from the first plaster you will only be able to cast one from each. See mine here

      Good luck, any concrete project is good… if in doubt try a small test first

  4. I really appreciate this post! I have been afraid to try the rapid type concretes and have had to be so patient waiting for my projects to set! It was driving me silly, so now I can’t wait to try the rapidset cementall!
    I have been making concrete leaves this summer to make a rhubarb leaf water fountain. As a fellow Canuk, i’m wondering what you use to seal concrete, especially if you “paint” it or dry brush some color? Do you find sealing is enough to help it last through winter, or do you store your cement creations indoors through winter? (I’ve been using Portland cement with sand in a 1:3 ratio for most of my concrete).
    I’m grateful and thankful for any advice you can provide.

    1. I have made what seems like millions of rhubarb leaf stepping stones, everytime I cut rhubarb. The birdbath bowls that I made were not sealed and left out all winter. They have now lost some of their nice detailed texture but they are probably over 10 years old. I have yet to really get into the sealer issue since I see how the neighbourhood driveways never have a long lasting seal and they don’t even hold water. I think it’s an ongoing battle. Maybe a pool paint would be best since it does hold water and should be human safe. Concrete is porous in most cases so that is one reason that paint does not tend to stay that well as it gets ‘pushed off’ by the moisture if it’s penetrating. (as seen in block walls)

      Sorry it’s not a quick answer… I have noticed though that Cementall is so dense that when I made some sealers to test they did not perform any different than the ‘naked’ concrete, ie- it did not leach any water through. I’d almost be inclined to see how it would last just as is without any coating. The water would be running over the leaves? or sitting?

      I have made the stepping stones with a sand-topping mix which would be much like your mix. They have held up as well as any sidewalks. The ‘cream’ will eventually wear off and will show more of the sand or aggregate.

      Last thing I want is to be a slave to my concrete… that’s why I make concrete. If it does not last I’ll make some more. It outlasts my attachment in most cases.

  5. I have recently moved to Nicaragua from Canada, any idea as to what ratio of builders concrete I would have to use to make concrete planters? It is all that seems to be available here. Thanks for your time.😀

    1. That is a tough question. Sometimes people refer to Portland Cement as concrete. When you say ‘builders concrete’ is it a mix? or the portland cement? If it’s the cheap mix with the stone/aggregate I have heard that some people just sift out the big rocks and use it as a sand mix. If it’s portland cement use a ratio of 1 part portland cement to 2-3 parts sand. Do keep the curing planters out of the sun and dampen during curing.

  6. Hi Barb, thank you so much for sharing this very useful information, I truly appreciate it! I’m interested in making jewelry (pendants, bracelets, rings, etc.) is there a mix that you’d recommend for that?

    Many thanks!

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Click to Hide Advanced Floating Content

Support my Blog!

In order for me to deliver valuable content for free, it takes both time and money. Any donations will be used directly to bring you new and useful content!

Donation Form

$
Personal Info

Donation Total: $5.00

Back To Top