Use the online product calculator below to work out the quantity required for your project / job. Please note if you have a small job then the calculator rounds up to the nearest bag.

Please use ‘mm’ for ALL values. (i.e., 1m = 1000mm)

Simply fill in all three values, and the calculator will display quantity required.

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Total Volume = 0 m3
Litres Required = 0
Strongcrete Ready to use (25kg) bags: 0
Strongcrete Ready to use (40kg) bags: 0
Strongcrete 36 MPa Concrete (30kg) bags: 0

Strongcrete 15 Minute Concrete

  • As a guide, for posts up to 1.8m in length, use one 25kg bag.
  • For larger posts use two bags
  • Where higher strengths are required, use Hi Strength 15 Minute concrete

Strongcrete Hi Strength 15 Minute Concrete

  • As a guide, for posts up to 1.8m in length, use one 25kg bag.
  • For larger posts use two bags
  • To be used for any project requiring strengths of up to 36 MPa

Strongcrete Pave Set

  • Contents of one bag will cover 9-10m² at a 3mm gap width
  • Can be used for joints from 3mm to 20mm

20 kg Strongcrete Mortar

  • With addition of water, a 20kg bag of mortar will typically produce 12.5 to 13 litres of fresh mortar
Quantities guide
Masonry Item Number laid per 20kg MORTAR bag
Full size brick 20-35
700mm brick 45-50
Concrete block 20-25

30 kg Strongcrete Industry Mortar

  • With addition of water, a 30kg bag of mortar will typically produce 18 to 19 litres of fresh mortar
Quantities guide
Masonry Item Number laid per 30kg INDUSTRY MORTAR bag
Concrete brick 55-60
Clay brick 40-45
Concrete block 20-27

20 kg & 40kg Strongcrete Cement

Suggested mix proportions by volume
Job Type Cement Sand Stone
Hi Strength 1 2 1
General work 1 2.5 4
Mass pour 1 3 5
Mortar for general use 1 6 Nil
Mortar around sea or sea spray 1 4 Nil

20 kg Strongcrete Supa Coat Plaster

  • With addition of water you will typically produce 12.5 to 13 litres of fresh plaster
  • Coverage is approximately 3m² per 20kg bag at a nominal 4mm thickness