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The industry standard for what is considered a good slip-resistant level is around 0.400.
A lower number means the surface is considered slippery and possibly unsafe.
A higher number indicates greater traction and a lower chance of slip and fall problems.


Testing the concrete pavers:

- Control - no sealer present
- Stain treated paver
- Solvent treated paver
- Water-Based sealer treated paver
- Sealer with an Anti-Slip additive treated paver
- Premium Penetrating Sealer treated paver

Ok... So HOW do we Measure Slipperiness of a Surface

This Slip-Meter measures the FRICTION level of a surface.

Dynamic Coefficient Of Friction = D.C.O.F

We'll simulate slip-causing conditions by using a standard solution that's comparable to soapy water.

We are testing the impact of adding a sealer to a paver surface, and the resulting slip-resistance levels.

The LOWER the DCOF = the MORE SLIPPERY the surface.

The HIGHER the DCOF = the HIGHER the FRICTION...

or the BETTER the slip-resistance.


The standard DCOF rating is about a 0.40 reading.

Anything higher than a 0.40 is ideal.

Let's TEST some Pavers!

Testing the un-sealed control paver surface area.

The DCOF is 0.759.


Testing the Color Stained paver section.

The DCOF is 0.519.

Sealing the surface lead to some traction loss, but it was still very slip-resistant.

Comparing the DCOF readings of the Solvent-based sealer and the Water-Based sealer (StrongSeal Wetlook).

Testing the Glazeguard Plus sealer (containing the CoverGrip anti-slip additive) on the paver surface area.

Testing the Premium Penetrating sealer on the paver surface area.

Conclusions as to which sealing options provide the best combination of slip resistance and appearance needs.

Let's TEST if adding a Sealer to Travertine Tile makes it MORE or LESS Slippery.

Introduce the Travertine paver test:

- Testing the impact of adding a sealer to a Travertive surface, and the resulting slip-resistance levels.

- Testing the un-sealed Travertive surface for it's slip-resistance levels.

DCOF was less than 0.40.

- Testing the GlazeGuard Plus (w/ CoverGrip Anti-slip additive) treated Travertive surface for it's slip-resistance levels.

DCOF was less than 0.42.

- Testing the Solvent-based sealer treated Travertive surface for it's slip-resistance levels.

DCOF was approximately 0.267.
That is very slippery.


Comparing the DCOF readings of 3 Travertine areas:

- A GripTreat treated section
- A Non-Sealed area.
- A GripTreat + Premium penetrating sealed area.
- This combination achieved the highest level of sheen and slip-resistance.


Charles Idowu | Technical Director

CoverTec Products,
10857 Northwest 50th Street, Sunrise, FL 33351
5PP4+M3 Sunrise, FL, USA
(754) 223-2465
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