Are these concrete rebar spacer moulds injection moulded?

Yes. Every Zhihua spacer block mould is injection moulded from reinforced polypropylene (PP) or ABS on in-house injection moulding machines, typically rated for 150+ concrete pour cycles. This is the construction-industry standard for rebar spacer, cover block, saddle spacer, bar strip and round disc moulds.

What is injection moulding for rebar spacers?

Injection moulding for rebar spacers is the process of forcing molten reinforced PP or ABS into a precision steel cavity that defines the exact cover thickness, rebar seat and 1-out-N layout. It produces dimensionally consistent rebar spacer moulds with smooth demoulding walls, typically delivering 150+ concrete pour cycles per mould.

What types of concrete spacer moulds do you supply?

We supply injection-moulded spacer block moulds, rebar cover spacers, saddle spacers, bar strip spacers, plum-blossom spacers, round disc spacers, slot insert spacers, concrete test specimen moulds and ballast block moulds.

Are spacer block moulds used for rebar concrete cover?

Yes. Spacer blocks, saddle spacers, plum-blossom covers and round disc covers are widely used to maintain the required concrete cover over rebar in slabs, beams, columns, walls and foundations.

Concrete Spacer Moulds for Rebar & Cover Blocks

Injection-moulded rebar spacer moulds built for cover accuracy & 150+ pours

Concrete spacer block moulds produce the small elements that sit between rebar and formwork to hold the specified concrete cover thickness. The construction-industry standard for these moulds is injection moulding: molten reinforced polypropylene (PP) or ABS is forced under high pressure into a precision-machined steel cavity, producing a rigid, dimensionally consistent mould with smooth demoulding walls that survives 150+ concrete pour cycles.

Zhihua runs the injection moulding in-house on its own tool shop, so every rebar spacer mould — whether a square/conical/sloped spacer block, a saddle spacer, a bar strip spacer, a plum-blossom rebar cover, a round disc cover or a slot insert — uses a steel tool cut from the buyer's drawing or sample. Standard catalogue items and OEM dimensions are both available.

Buyers searching for injection moulding for rebar spacer, plastic rebar spacer moulds, concrete spacer mould or cover block mould are usually comparing three things: cover-thickness accuracy, 1-out-N count (pieces per pour), and mould service life. All three are locked in at the tool-cutting stage — see the Concrete Spacer Block Moulds Buying Guide for a project checklist.

ProcessInjection-moulded PP / ABS on in-house steel tools — 150+ pour cycle rating

ApplicationsSlabs, beams, columns, walls, foundations, precast elements and rebar cover control

Product scopeRebar spacers, cover blocks, saddle/bar-strip/plum-blossom/disc spacers, slot inserts and test specimens

CustomizationCover thickness, dimensions, 1-out-N count, OEM profiles built from your drawing

Representative Concrete Spacer Block Moulds

72 qualified product examples across 11 categories. More sizes and 1-out-N counts can be quoted from drawings or sample photos.

Triangular No-Fines & Test Specimen Moulds

Triangular No Fines Concrete Block Mould 23X11X50Cm

Triangular No Fines Concrete Block Mould 23 × 11 × 50 cm

23 × 11 × 50 cm

Tensile Test Specimen Mould 33 × 6 × 1.3 cm

33 × 6 × 1.3 cm

Concrete Test Specimen Mould 19 × 4 × 1.5 cm

19 × 4 × 1.5 cm

Concrete Test Specimen Mould 37 × 10 × 5 cm

37 × 10 × 5 cm

Concrete Test Specimen Mould 40X10X1 5Cm

Concrete Test Specimen Mould 40 × 10 × 1.5 cm

40 × 10 × 1.5 cm

U Shaped Concrete Block Mould 23X20X10 5Cm

U Shaped Concrete Block Mould 23 × 20 × 10–5 cm

23 × 20 × 10–5 cm

Sloped Spacer Block Moulds

Sloped Spacer Block Mould 20 × 12 × 7–3 cm

20 × 12 × 7–3 cm

Sloped Spacer Block Mould 20 × 17 × 7–3 cm

20 × 17 × 7–3 cm

Sloped Spacer Block Mould 20 × 23 × 7–3 cm

20 × 23 × 7–3 cm

Sloped Spacer Block Mould 22.5 × 10 × 7–3 cm

22.5 × 10 × 7–3 cm

Sloped Spacer Block Mould 25 × 20 × 7–3 cm

25 × 20 × 7–3 cm

Sloped Spacer Block Mould 30 × 30 × 15–9 cm

30 × 30 × 15–9 cm

Sloped Spacer Block Mould 32 × 20 × 7–3 cm

32 × 20 × 7–3 cm

Conical Spacer Block Moulds

Conical Spacer Block Mould 2 9X1 6Cm 1Out25

Conical Spacer Block Mould 2.9 × 1.6 cm · 1-out-25

2.9 × 1.6 cm · 1-out-25

Conical Spacer Block Mould 3 × 3 cm · 1-out-36

3 × 3 cm · 1-out-36

Conical Spacer Block Mould 3 × 4 cm · 1-out-36

3 × 4 cm · 1-out-36

Conical Spacer Block Mould 3 × 5 cm · 1-out-36

3 × 5 cm · 1-out-36

Conical Spacer Block Mould 5 × 3 cm · 1-out-25

5 × 3 cm · 1-out-25

Conical Spacer Block Mould 5 × 4 cm · 1-out-25

5 × 4 cm · 1-out-25

Conical Spacer Block Mould 5 × 5 cm · 1-out-25

5 × 5 cm · 1-out-25

Conical Spacer Mould 40 × 35 mm · 1-out-16

40 × 35 mm · 1-out-16

Conical Spacer Mould 40 × 40 mm · 1-out-16

40 × 40 mm · 1-out-16

Conical Spacer Mould 40 × 45 mm · 1-out-16

40 × 45 mm · 1-out-16

Square Spacer Block Moulds

Square Spacer Block Mould 3X3X1 5Cm 1Out100

Square Spacer Block Mould 3 × 3 × 1.5 cm · 1-out-100

3 × 3 × 1.5 cm · 1-out-100

Square Spacer Block Mould 10X10X3 5Cm 1Out16

Square Spacer Block Mould 10 × 10 × 3.5 cm · 1-out-16

10 × 10 × 3.5 cm · 1-out-16

Square Spacer Block Mould 10X10X4 5Cm 1Out16

Square Spacer Block Mould 10 × 10 × 4.5 cm · 1-out-16

10 × 10 × 4.5 cm · 1-out-16

Square Spacer Block Mould 10X10X5 5Cm 1Out16

Square Spacer Block Mould 10 × 10 × 5.5 cm · 1-out-16

10 × 10 × 5.5 cm · 1-out-16

Square Spacer Block Mould 10X10X6 5Cm 1Out16

Square Spacer Block Mould 10 × 10 × 6.5 cm · 1-out-16

10 × 10 × 6.5 cm · 1-out-16

Saddle Spacer Moulds

Mini Saddle Spacer Mould 3X3X2 3Cm Cover 13 20Mm

Mini Saddle Spacer Mould 3 × 3 × 2.3 cm · cover 13–20 mm · 1-out-25

3 × 3 × 2.3 cm · cover 13–20 mm · 1-out-25

Saddle Spacer Mould Cover 5 3X4Cm 1Out16

Saddle Spacer Mould · cover 5–3 × 4 cm · 1-out-16

cover 5–3 × 4 cm · 1-out-16

Saddle Spacer Mould Cover 7 3 5X4Cm 1Out18

Saddle Spacer Mould · cover 7–3.5 × 4 cm · 1-out-18

cover 7–3.5 × 4 cm · 1-out-18

Saddle Spacer Mould Cover 7 5X4Cm 1Out18

Saddle Spacer Mould · cover 7–5 × 4 cm · 1-out-18

cover 7–5 × 4 cm · 1-out-18

Saddle Spacer Mould Cover 7 5 4X4Cm 1Out18

Saddle Spacer Mould · cover 7.5–4 × 4 cm · 1-out-18

cover 7.5–4 × 4 cm · 1-out-18

Saddle Spacer Mould Cover 9 6X4Cm 1Out12

Saddle Spacer Mould · cover 9–6 × 4 cm · 1-out-12

cover 9–6 × 4 cm · 1-out-12

Saddle Spacer Mould Cover 11 8X4Cm 1Out12

Saddle Spacer Mould · cover 11–8 × 4 cm · 1-out-12

cover 11–8 × 4 cm · 1-out-12

Saddle Spacer Mould · cover 38–25–20 mm · 1-out-36

cover 38–25–20 mm · 1-out-36

Large Saddle Spacer Mould 4 5X4 5X4 8Cm Cover 40 45Mm

Large Saddle Spacer Mould 4.5 × 4.5 × 4.8 cm · cover 40–45 mm

4.5 × 4.5 × 4.8 cm · cover 40–45 mm

Bar Strip Spacer Moulds

Bar Strip Spacer Mould 20 × 3 × 3 cm · 1-out-10

20 × 3 × 3 cm · 1-out-10

Bar Strip Spacer Mould 20 × 4 × 3 cm · 1-out-3

20 × 4 × 3 cm · 1-out-3

Bar Strip Spacer Mould 25 × 3 × 3 cm · 1-out-10

25 × 3 × 3 cm · 1-out-10

Bar Strip Spacer Mould 28 35X2X2Cm 1Out8

Bar Strip Spacer Mould 28 × 2 × 2 cm and 35 × 2 × 2 cm · 1-out-8

28 × 2 × 2 cm and 35 × 2 × 2 cm · 1-out-8

Bar Strip Spacer Mould 30 × 3 × 3 cm · 1-out-10

30 × 3 × 3 cm · 1-out-10

Bar Strip Spacer Mould 35X2 8X1 2Cm 1Out15

Bar Strip Spacer Mould 35 × 2.8 × 1.2 cm · 1-out-15

35 × 2.8 × 1.2 cm · 1-out-15

Bar Strip Spacer Mould 35 × 3 × 3 cm · 1-out-8

35 × 3 × 3 cm · 1-out-8

Bar Strip Spacer Mould 40 × 3 × 3 cm · 1-out-8

40 × 3 × 3 cm · 1-out-8

Bar Strip Spacer Mould 47 × 7 × 7 cm · 1-out-5

47 × 7 × 7 cm · 1-out-5

Bar Strip Spacer Mould 58 × 8 × 5–4 cm · 1-out-5

58 × 8 × 5–4 cm · 1-out-5

Plum-Blossom Rebar Cover Spacer Moulds

Plum Blossom Spacer Mould · cover 75–100 mm

cover 75–100 mm · mould 41.4 × 38.6 × 5 cm

Plum Blossom Rebar Cover Spacer Mould 60 70 80X30Mm 1Out8

Plum Blossom Rebar Cover Spacer Mould 80 × 30 mm · 1-out-8

80 × 30 mm · 1-out-8

Plum Blossom Rebar Cover Spacer Mould 40 45 50X30Mm 1Out8

Plum Blossom Rebar Cover Spacer Mould 50 × 30 mm · 1-out-8

50 × 30 mm · 1-out-8

Plum Blossom Rebar Cover Spacer Mould 35 40 45 50X28Mm 1Out30

Plum Blossom Rebar Cover Spacer Mould 50 × 28 mm · 1-out-30

50 × 28 mm · 1-out-30

Plum Blossom Rebar Cover Spacer Mould 30 35X28Mm 1Out42

Plum Blossom Rebar Cover Spacer Mould 35 × 28 mm · 1-out-42

35 × 28 mm · 1-out-42

Plum Blossom Rebar Cover Spacer Mould 30 35 40X28Mm 1Out42

Plum Blossom Rebar Cover Spacer Mould 40 × 28 mm · 1-out-42

40 × 28 mm · 1-out-42

Plum Blossom Rebar Cover Spacer Mould 30 33 35X20Mm 1Out24

Plum Blossom Rebar Cover Spacer Mould 35 × 20 mm · 1-out-24

35 × 20 mm · 1-out-24

Round Disc Spacer Moulds

Round Disc Spacer Mould 50 × 18 mm · 1-out-24

50 × 18 mm · 1-out-24

Round Disc Spacer Mould 50 × 30 mm · 1-out-30

50 × 30 mm · 1-out-30 · hole Ø1 mm

Round Disc Spacer Mould 52 × 18 mm · 1-out-24

52 × 18 mm · 1-out-24 · hole Ø8 mm

Round Disc Spacer Mould 54 × 20 mm · 1-out-35

54 × 20 mm · 1-out-35 · hole Ø14 mm · cover 20 mm

Toothed Round Disc Spacer Mould 54X20Mm 1Out35

Toothed Round Disc Spacer Mould 54 × 20 mm · 1-out-35

54 × 20 mm · 1-out-35 · hole Ø14 mm · cover 20 mm

Round Disc Spacer Mould 57 × 20 mm · 1-out-36

57 × 20 mm · 1-out-36 · hole Ø13–15 mm · cover 20 mm

Round Disc Rebar Cover Spacer Moulds

Round Disc Cover Spacer Mould 95X30Mm 1Out4

Round Disc Cover Spacer Mould 95 × 30 mm · 1-out-4

95 × 30 mm · 1-out-4 · hole Ø15 mm · cover 40 mm

Round Disc Cover Spacer Mould 140X33Mm 1Out4

Round Disc Cover Spacer Mould 140 × 33 mm · 1-out-4

140 × 33 mm · 1-out-4 · hole Ø20 mm · cover 60 mm

Round Disc Cover Spacer Mould 140X40Mm 1Out4

Round Disc Cover Spacer Mould 140 × 40 mm · 1-out-4

140 × 40 mm · 1-out-4 · hole Ø20 mm · cover 60 mm

Round Disc Cover Spacer Mould 150X33Mm 1Out4

Round Disc Cover Spacer Mould 150 × 33 mm · 1-out-4

150 × 33 mm · 1-out-4 · hole Ø18–20 mm · cover 65 mm

Round Disc Cover Spacer Mould 150X33Mm 1Out4 Variant

Round Disc Cover Spacer Mould Ø15 × 3.3 cm · hole Ø2 cm · 1-out-4

Ø15 × 3.3 cm · hole Ø2 cm · 1-out-4

Round Disc Cover Spacer Mould 170X35Mm 1Out1

Round Disc Cover Spacer Mould 170 × 35 mm · 1-out-1

170 × 35 mm · 1-out-1 · hole Ø13 mm · cover 78.5 mm

Slot Insert Spacer Moulds

Slot Insert Spacer Mould 100 × 30 mm

100 × 30 mm · mould 455 × 340 mm

Slot Insert Spacer Mould 120 × 30 mm

120 × 30 mm · mould 540 × 340 mm

Slot Insert Spacer Mould 140 × 30 mm

140 × 30 mm · mould 470 × 340 mm

Slot Insert Spacer Mould 150 × 30 mm

150 × 30 mm

Slot Insert Spacer Mould 160 × 30 mm

160 × 30 mm · mould 530 × 349 mm

Round Ballast Block Moulds

Round Ballast Block Mould 36 × 11 cm · 22 kg

36 × 11 cm · 22 kg

Concrete Spacer Block Mould Buyer Guide

Spacer block mould orders are usually driven by rebar cover thickness, mould 1-out-N count and whether the mould is for sloped, saddle, bar strip, plum-blossom or round disc applications.

Typical spacer mould types

Spacer block moulds: square, conical, sloped and U-shaped blocks for general cover.
Saddle spacers: used in slab-on-grade and foundation work to support rebar mesh.
Bar strip and plum-blossom spacers: for narrow rebar or specific cover thickness requirements.
Round disc and slot insert spacers: for vertical rebar in columns and walls.

Project drawing checklist

For spacer block moulds, the key parameters are the cover thickness, finished block dimensions and the 1-out-N count. A sample photo or marked drawing helps confirm orientation and demoulding direction.

Specify the required cover thickness (e.g. 20mm, 30mm, 50mm).
Confirm the finished spacer dimensions and 1-out-N count.
Mark whether the mould is for horizontal slab or vertical rebar use.

Application	Suitable mould type	Key parameters
Slab cover	Saddle spacers, bar strips, sloped spacer blocks	Cover thickness, base size, 1-out-N count
Column / wall rebar	Round disc covers, slot inserts, plum-blossom covers	Cover thickness, diameter, rebar diameter compatibility
Foundation / pile cap	Large spacer blocks, ballast block moulds	Dimensions, load capacity, OEM profile

What to send for a fast quote

Spacer mould projects often follow local construction standards. A sample photo or marked drawing helps us confirm cover thickness, dimensions, 1-out-N count and application type.

Required cover thickness, finished spacer dimensions and 1-out-N count
Whether it is for slab, beam, column, wall or foundation
Application: rebar cover, slab support, ballast, test specimen or other
Quantity, destination country and mixed-profile requirements

Need spacer block moulds for a project?

Send your drawing or sample photo. We can review standard catalogue options or OEM mould feasibility.

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Concrete Rebar Spacer Mould FAQ

Are these rebar spacer moulds injection moulded?

Yes. All Zhihua spacer and cover-block moulds are injection moulded from reinforced polypropylene (PP) or ABS on in-house injection moulding machines using our own steel tools. This is the same process used by major rebar spacer brands worldwide and is what gives the moulds their 150+ pour cycle rating and consistent cover thickness.

Why injection moulding instead of other plastic processes for rebar spacers?

Injection moulding produces a one-piece, void-free wall with exact cover-thickness tolerance and a smooth interior for clean demoulding. It also allows 1-out-N tools (16/25/36/42/100 cavities per pour), which is the main lever on spacer piece-cost. Thermoformed or 3D-printed moulds cannot match this on either cycle count or dimensional consistency.

What plastic is used for concrete spacer moulds?

Reinforced polypropylene (PP) is standard for most spacer and cover block moulds because it flexes slightly for demoulding and withstands concrete alkalinity across 150+ cycles. ABS is used for thinner-wall, higher-precision profiles such as small round-disc and slot-insert spacers. We specify the material per profile at tool-cutting.

Can you make custom spacer moulds from drawings?

Yes. Send a sample photo, dimensions or marked drawing. We cut the steel injection-mould tool in-house and typically ship first-article samples in 15–30 days after drawing approval.

Can I order different spacer types in one shipment?

Yes. Mixed-SKU orders are common for construction projects where multiple spacer types are required together.

Are these moulds only for rebar cover?

No. Spacer block moulds are also used for ballast blocks, concrete test specimens and other precast concrete elements.

Read the full Concrete Spacer Block Moulds Buying Guide →

Concrete Rebar Spacer & Cover Block Moulds