Reliable cover for every pour

CROSSLOCK self-locking cover blocks, plastic rebar chairs and vertical spacers help keep reinforcement positioned while concrete is placed. Choose the right product for your application, then buy online with confidence.

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CROSSLOCK CL-20 product, packet and reinforcement placement photographs

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CROSSLOCK CL-20 self-locking cover block

Self-Locking Cover Blocks

For slab, beam, column and footing applications. Review product dimensions and packet quantities before ordering.

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Official CROSSLOCK spacer and rebar chair product photograph

Plastic Rebar Chairs

Support top reinforcement with purpose-made plastic rebar chairs in the available sizes.

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Official CROSSLOCK SL-40 vertical spacer installed on a column

Vertical Rebar Spacers

Find side and radial cover options for vertical reinforcement and formwork.

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Choose the quantity for your work

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Slab area

sq ft

Slab thickness

What is present in your slab?

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Leave total beam length blank to use the quick estimate.

Down-beam main bar: select the largest diameter

Largest down-beam main-bar diameter

Bottom steel: 20 mm cover · 2 ft spacing

Concrete placement with CROSSLOCK spacers and rebar chairs

Built for clearer site decisions

Learn about concrete cover, product applications and installation considerations before you order. When a drawing or site condition is specific, check the approved structural requirements and ask an expert.

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Partner with CROSSLOCK

Interested in referring CROSSLOCK products? Visit the affiliate programme page to review the approved terms and application process.

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