Made by Cement Australia
Mortar and render · Bricklaying
Trade Mortar 20kg
Pre-blended M4 brick mortar mix to AS3700. About 20 bricks or 10 blocks per 20kg bag. Just add water.
Comes on pallets of 48 or 84 × 20kg bags.
1 bag (less than a pallet).
Lead time: Approx. 1 to 2 working days
Code: 200842086
Available to order from Allmat. Click and collect or delivered across Adelaide.
How many bags do I need?
Work it out with the free Allmat concrete calculator.
About Trade Mortar 20kg
A pre-blended M4 bricklaying mortar that conforms to AS3700. The cement, sand and additives are in the right proportions every batch, so colour and strength stay consistent and there is no batching on site.
Use it for bricks, masonry blocks, stonework and general mortar work.
- Grade
- M4 to AS3700
- Coverage
- About 20 bricks or 10 blocks per bag (10mm joint)
- Water
- About 3.5L per bag
- Use within
- 1 hour of mixing
- Bag
- 20kg
Best for
- Bricks and masonry blocks
- Stonework
- Brickwork repairs
- General mortar work
How to use
- In a mixer, put in the clean water first (about 3.5L per bag, or as the bag directs), then tip in the mortar and mix well. Start with the least water that gives a workable mix.
- In a barrow or bucket, make a well in the mix, add water as the bag directs and mix to an even consistency.
- Only mix what you can use within 1 hour, and do not let it stand. Re-tempering a stiffened batch with more water weakens the mortar, and extra water slows the set.
- Lay with a trowel. Let the joints stiffen until touch dry before raking or finishing them.
Storage & safety
Keeps about 6 months from manufacture, sealed, dry and off the ground. Do not use a bag that has gone hard. Wear dust-proof goggles and PVC or rubber gloves. Each 20kg bag is a two-person lift. Storing and handling bagged cement.
- Its Safety Data Sheet also lists a silica dust risk, so avoid breathing the dust.
Documents
The manufacturer's own sheets. Open one to read it on the page, share it or download the PDF.
Trade Mortar questions
About 5 × 20kg bags for 100 house bricks, or 10 × 20kg bags for 100 blocks, at a 10mm joint. That is worked from Cement Australia's figure of about 20 bricks or 10 blocks per bag. For your own wall, the mortar calculator, linked below these questions, works it out.
Use it within 1 hour. Do not add more water to old mortar to loosen it, as that weakens it.
The mortar squeezes out of the joint as soon as you set a brick or block on the bed.
Once the mortar is firm to the touch.
Linked from these answers: Mortar calculator
Sources and guidance
The product information on this page comes from Cement Australia's published product data sheets, safety data sheets and website (see Documents above). It is general guidance only. Other manufacturers may give different advice for their own products, so always follow the instructions on the bag and the product's data sheet. Structural work, such as footings for buildings, must follow your engineer's design and the relevant Australian Standards.
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