FAQs

A collection of commonly asked questions and information on our products,

our process, installation information and more. 

What is the difference between the Z Liqui-Crete add mix and the Z Counter-Pack add mix?

The difference between the two is the consistency of the mix. The Liqui-Crete is designed to use slightly more water, giving you a more flowable mix that will flow throughout the fibreglass mesh reinforcement. If you are using a more traditional reinforcement such as welded wire mesh, you will be better off with Counter-Pack. Both will achieve about 7500 psi (50,000 MPA) after 28 days.

What are the Z-Counterforms made of?

Z-Counterforms are made of a proprietary mix of PVC.

The size of reinforcing in a countertop is an important consideration. 

Concrete benchtops that are made with rebar that is too large in scale for the slab thickness are susceptible to telegraph cracking.

 

When concrete shrinks due to drying out, high tensile stress levels develop around proportionally oversized reinforcing. These stresses cause cracks that run along the length of the steel. Smaller diameter reinforcing has less of an effect on the concrete, so the same amount of concrete shrinkage develops much less tensile forces, thus the likelihood of cracks caused by the steel itself drops dramatically.

 

Because all concrete shrinks to some degree and shrinkage occur over a long period of time, the occurrence of telegraph cracking may not appear until long after a countertop is installed.

Our recommendation is to use a fibreglass based composite mesh or bar instead to prevent rust issues, ghosting and telegraph cracking.

THE CONCRETE COUNTERTOP INSTITUTE

How do I make corners?

Corners are simply mitred with an ordinary mitre saw. Any angle can be easily achieved.

 

How is the Z counter form removed once the concrete has cured?

Because of Z-Counterforms patented design simply pull the form forward and it will snap clean revealing a smooth edge.

 

Is Z-Counterforms re-useable?

They are unable to re-used because the tab under the concrete top stays in place when you snap off the Z-Counterform.

 

When can I snap off the forms?

The forms can be snapped off 36-48 hours after pouring. Once the concrete is fully cured. 

 

When can I begin sanding?

Approximately 48 hours until the cement is fully cured before sanding or polishing.

When can I start staining my benchtop?

You can begin staining 4 days after pouring and the benchtop has been prepped and cured. 

 

When can I seal my benchtop?

If you are using the SiAcryl 14, you can begin sealing 4-5 days after pouring. If you are using an epoxy sealer you must make sure the concrete is 100% cured. This can take as long as 28 days.

 

Which sealer should I use?

Z SiAcryl 14

Easy to apply sealer. Exhibits a satin finish. Z SiAcryl 14 will not alter the colour of concrete or leave residue on the concrete surface.

 

Z Aqua-Poxy

2 part, easy to apply epoxy sealer. Semi-gloss finish. Will slightly enhance the colouring of the benchtop without darkening. Put on multiple coats to build up a thick epoxy look.

 

Z-Poxy

2 part traditional epoxy sealer. Not recommended for first-time users. A high gloss finish will significantly darken the benchtop. Will give you a thick wet epoxy look.

 

Aqua-Thane M35

A water-based polyurethane that forms an impermeable topical shell to offer some of the best stain protection and scratch resistance. Applied in thin coats with a roller and will not darken or 'wet out' the concrete. Exhibits a low lustre matte to a satin finish.

 

Aqua-Thane G40

A water-based polyurethane that forms an impermeable topical shell to offer some of the best stain protection and scratch resistance. Applied in thin coats with a roller and will darken the concrete. Has a gloss finish.

All of our sealers are 100% benchtop safe.

Can I return items that I have purchased?

View Sureforms returns policy HERE for all details.

SUREFORM WAREHOUSE

Store collections by appointment only. 

New Zealand

AUCKLAND

26E William Pickering Dr,

Rosedale, Auckland 0632

Ph: +64 275 89 8899
 

Email: info@sureform.co.nz