Concrete Grey Blocks are manufactured utilising recycled fly ash to provide a lightweight, high strength product. Concrete Grey Blocks are commonly used for construction on houses, schools, and various commercial projects.
Choosing the right Concrete Grey Block
Before selecting, you should ensure this product meets your projects requirements. Certain Concrete Grey Blocks are lightweight, heavy duty and/or fire rated. Please check the Additional Information. Please consult National Masonry™ if you are unsure on the best Concrete Grey Block for your construction needs.
Our blocks come in Natural Grey
| Website Image | Product Code | Product Name | Dimensions | Weight per unit (kg) | Units per pallet | Fire Rating | MPA | Notes |
|---|---|---|---|---|---|---|---|---|
 | 10.01 | Standard | 390x190x90 | 8.5 | 195 | (ƒ’uc = 15MPa) | ||
 | 10.02 | Three Quarters | 290x190x90 | 6.7 | 240 | (ƒ’uc = 15MPa) | ||
 | 10.03 | Half | 190x190x90 | 4.4 | 360 | (ƒ’uc = 15MPa) | ||
 | 10.25 | L Shape Corner Return | 390x190x90/190 | 11.4 | 120 | (ƒ’uc = 15MPa) | ||
 | 10.71 | Standard Half Height | 390x90x90 | 4 | 390 | (ƒ’uc = 15MPa) | ||
 | 10.31 | Solid | 390x190x90 | 12.4 | 156 | (ƒ’uc = 15MPa) |
| Website Image | Product Code | Product Name | Dimensions | Weight per unit (kg) | Units per pallet | Fire Rating | MPA | Notes |
|---|---|---|---|---|---|---|---|---|
 | 12.709 | Thickwall | 390x190x110 | 10.9 | 150 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | Pallet contains 10 x 12.703 |
 | 12.703 | Thick Half Wall | 190x190x110 | 5.65 | n/a | 2 hour insulation FRL | (ƒ’uc = 15MPa) | Not sold separately |
| Website Image | Product Code | Product Name | Dimensions | Weight per unit (kg) | Units per pallet | Fire Rating | MPA | Notes |
|---|---|---|---|---|---|---|---|---|
 | 15.01 | Standard Hollow | 390x190x140 | 10.88 | 144 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 15.02 | Three Quarter | 290x190x140 | 8.9 | 160 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 15.03 | Half | 190x190x140 | 5.6 | 240 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 15.09 | Control Joint | 390x190x140 | 11.1 | 120 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 15.10 | Control Joint Half | 190x190x140 | 6.8 | 240 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 15.12 | Lintel | 390x190x140 | 16.2 | 120 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 15.20 | Knockout Bond Beam | 390x190x140 | 10.6 | 120 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 15.22 | Seven Eighths | 340x190x140 | 9.7 | 125 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 15.25 | Corner Return | 390x190x140/190 | 13.92 | 105 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 15.42 | Channel | 390x190x140 | 10.5 | 144 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 15.45 | Cleanout | 390x190x140 | 9.89 | 120 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 50.45 | Cleanout Biscuit & Spring | 4.1 | 120 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | ||
 | 15.48 | H Block | 390x190x140 | 11.01 | 144 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 15.709 | Thick Wall | 390x190x140 | 17.86 | 120 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | Pallet contains 115 x 15.709 & 10 x 15.703 |
 | 15.703 | Thick Wall Half | 190x190x140 | 10.12 | N/A | 2 hour insulation FRL | (ƒ’uc = 15MPa) | Not sold separately |
 | 15.71 | Standard Half Height | 390x90x140 | 5 | 288 | 2 hour insulation FRL | (ƒ’uc = 15MPa) |
| Website Image | Product Code | Product Name | Dimensions | Weight per unit (kg) | Units per pallet | Fire Rating | MPA | Notes |
|---|---|---|---|---|---|---|---|---|
 | 20.01 | Standard | 390x190x190 | 13.29 | 108 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.02 | Three Quarters | 290x190x190 | 9.4 | 144 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.03 | Half | 190x190x190 | 7.3 | 180 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.03C | Curved Wall Half | 190x190x190/140 | 6.3 | 180 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.04 | Quarter | 190x190x90 | 4.3 | 360 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.09 | Full Control Joint | 390x190x190 | 14.2 | 72 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | 1 pallet = 72 x 20.09 and 20.10 (Sold in pairs) |
 | 20.10 | Control Joint Half | 190x190x190 | 8.5 | 72 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | 1 pallet = 72 x 20.09 and 20.10 (Sold in pairs) |
 | 20.13 | Half Lintel | 190x190x190 | 8.2 | 220 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.18 | Deep Lintel | 390x190x190 | 14.9 | 125 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.20A | Deep Channel Biscuitless Knockout | 390x190x190 | 12.6 | 108 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.21A | Knockout Bond Corner | 390x190x190 | 12.4 | 108 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.22 | Seven Eighths | 340x190x190 | 12.74 | 108 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.25 | Three Quarter Lintel | 290x190x190 | 10 | 165 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.40 | Half Height Sill | 190x90x190 | 4.48 | 360 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.42 | Channel | 390x190x190 | 13.09 | 108 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.45 | Cleanout | 390x190x190 | 11.62 | 108 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.48 | H Block | 390x190x190 | 11.73 | 108 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.60 | Bonded Pilaster Return | 390x190x390 | 17.9 | 60 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.71 | Standard Half Height | 390x90x190 | 7.3 | 216 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.140 | Standard | 390x140x190 | 11 | 108 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.748 - background needs to be removed | Squint | 290x190x190 | 10.2 | 90 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 20.925 | Single Core | 390x190x190 | 16.6 | 108 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 50.31 | Capping Tile | 390x40x190 | 5.7 | 270 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
| 50.45 | Biscuit & Spring | 4.1 | 120 | 2 hour insulation FRL | (ƒ’uc = 15MPa) |
| Website Image | Product Code | Product Name | Dimensions | Weight per unit (kg) | Units per pallet | Fire Rating | MPA | Notes |
|---|---|---|---|---|---|---|---|---|
 | 30.01 | Full Length Standard | 390x190x290 | 18.9 | 72 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 30.02 | Three Quarter / 300mm Pier | 290x190x290 | 15.2 | 80 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 30.03 (20.02) | Half Length | 290x190x190 | 9.4 | 144 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 30.04 (10.03) | Quarter Length | 290x190x90 | 6.7 | 240 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 30.18 | Deep Lintel | 390x190x290 | 17.1 | 85 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 30.42 | Channel | 390x190x290 | 21 | 60 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 30.45 | Cleanout | 390x190x290 | 16.65 | 60 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
| 50.45 | Cleanout Biscuit & Spring | 4.1 | 120 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | ||
 | 30.48 | H Block | 390x190x290 | 14.52 | 72 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 30.71 | Half Height | 390x90x290 | 9.25 | 144 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 30.925 | Standard | 390x190x290 | 17.5 | 72 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
 | 40.925 | 400 Pier Block | 390x190x390 | 23.9 | 54 | 2 hour insulation FRL | (ƒ’uc = 15MPa) | |
| 50.31 | Capping Tile | 390x40x190 | 5.7 | 270 | 2 hour insulation FRL | (ƒ’uc = 15MPa) |
| Website Image | Product Code | Product Name | Dimensions | Weight per unit (kg) | Units per pallet | Fire Rating | MPA | Notes |
|---|---|---|---|---|---|---|---|---|
 | 20.48SB | H Block | 400x190x190 | 13.1 | 90 | No mortar required in perps (vertical joints) | ||
 | 20.21SB | Full Length Corner | 400x190x190 | 14.8 | 90 | No mortar required in perps (vertical joints) | ||
 | 20.03SB | Half | 200x190x190 | 7.1 | 165 | No mortar required in perps (vertical joints) |
| Website Image | Product Code | Product Name | Dimensions | Weight per unit (kg) | Units per pallet | Fire Rating | MPA | Notes |
|---|---|---|---|---|---|---|---|---|
 | 20.01 | Standard | 390x190x190 | 17.8 | 108 | 40MPa | ||
 | 20.02 | Three Quarters | 290x190x190 | 12.6 | 144 | 40MPa | ||
 | 20.03 | Half | 190x190x190 | 9.9 | 180 | 40MPa | ||
 | 20.42 | Channel | 390x190x190 | 17.1 | 108 | 40MPa | ||
 | 20.45 | Cleanout | 390x190x190 | 15.3 | 108 | 40MPa | ||
 | 20.48 | H Block | 390x190x190 | 15.9 | 108 | 40MPa | ||
 | 20.71 | Half Height | 390x90x190 | 8.3 | 216 | 40MPa | ||
 | 30.45 | Cleanout | 390x190x290 | 21.6 | 60 | 40MPa | ||
 | 30.48 | H Block | 390x190x290 | 19.1 | 72 | 40MPa | ||
 | 30.925 | Single Core | 390x190x290 | 22.6 | 72 | 40MPa |
| Product Photo | Product Name | Dimensions | Size | Notes |
|---|---|---|---|---|
 | Bagged Mortar Sand | Bulka Bag | 1200kg | Ideal for blocks with enhanced workability |
 | Bagged Mortar Sand | Bulka Bag | 620kg | Ideal for blocks with enhanced workability |
 | Concrete Blend | Bulka Bag | 1200kg | Blended Sand & Aggregate - just add cement and water |
 | Cement - GP Grey or Off White | 20kg | ||
 | Off White Cement | 20kg | ||
 | Mortar Additive (Tech Dry) | 5L, 20L | Mortar additive to improve water resistance & reduce efflo | |
 | Brickies Mate | 1L | Mortar Plasticiser preferred by most brickies | |
 | Environex Clearseal Sealer | 2L, 10L, 20L | Economical water based single coat pre-sealer | |
 | Environex Synergy Sealer | 2L, 10L, 20L | Premium, penetrating, surface consolidating sealer - resists salt | |
 | Environex Hi-Lite Sealer | 2L, 10L, 20L | Premium, colour enhancing semi-penetrating sealer | |
 | Enviroshield Enhancer Plus Sealer | 2L, 10L, 20L | Premium, colour enhancing semi-penetrating sealer | |
| Enviroshield Consolidator Plus Sealer | 2L, 10L, 20L | Economical, penetrating, surface consolidating sealer - resists salt | |
 | Environex Anti-Eff Efflorescence Cleaner | 1L, 5L, 15L | Specially formulated acidic cleaner for removing mortar and efflorescence | |
 | Environex Maestro Cleaner | 1L, 5L | Specially formulated chlorinated cleaner for removing moss, algae, mold & organic stains |
All our Concrete Grey Blocks and accessories can be picked up or we can deliver to the following areas:
South Queensland
Brisbane, Gold Coast, Sunshine Coast, Ipswich, Logan, Northern NSW, Toowoomba.
New South Wales
Newcastle, Lake Macquarie, Port Macquarie, Gosford, Hunter Region, Central Coast.
Don’t see your location here? Contact us to find a reseller near you.
