Hempel Technical Guideline

Non-skid Areas
Introduction
Specialty coating systems are often applied on decks etc to
Surface preparation
provide a non-skid surface. The rough non-skid surface is
achieved through inclusion or coarse particles often called It is recommended to check the specification for pre-treatment
aggregate. These particles are too large to pass through ordinary prior to application and/or the technical guidelines for surface
spray nozzles. Three alternative application solutions will be preparation. For non-skid areas the mechanical stress is typically
described here: high and it is particularly important to ensure a sharp, uniform
roughness.
 Spray application with special heavy duty equipment.
 Manual application with roller or squeegee.
 Airless application of regular products combined with hand
spread of the aggregate. Spray application
Hempadur Spray-Guard 35490, Hempadur Spray-Guard 35493 &
Hempel's Non-Skid 45710 cannot be applied by normal airless
Scope equipment. However they can be sprayed successfully with
special 10:1 heavy fluid air assisted equipment such as Graco
The methods described here, concerns specialty products: President, WIWA mortar 410 or similar

Hempadur Spray-Guard 35490 & Hempadur Spray-Guard It is not possible to give precise parameters for all application
35493 situations and the following should be seen as examples or
Ready to use epoxy products with aggregate mixed in. Typically indications.
applied as 1x3000µm in accordance with Norsok M501, Eds. 6,
system 4. May be combined with an optional blast primer Application equipment:
(Hempadur 15590). For current approval status contact Hempel.  Heavy fluid hose: To minimize pressure loss in the hose with
these thick viscous liquids, the length should be as short as
Hempel's Non-Skid 45710 possible and certain a minimum diameter may be necessary.
A three component epoxy high build coating. The non-sparking  Heavy fluid structure gun equipped with 3 way pressure relief
aggregate 97730 is delivered as a separate component to avoid valve.
settling in the can. The aggregate has to be mixed into the paint  Gun nozzle 3-5 mm depending on work speed, temperature,
just prior to application. Thoroughly mix base 45719. When required DFT and product (viscosity).
homogeneous add the aggregate 97730 and mix until  Pump input pressure (10:1 pump) should be range of 1.2 – 3
homogeneous. Add the curing agent 95570 and mix thoroughly bar, material temperature (15-20°C) is recommended.
again until homogeneous.  Pressure of the gun (set on the valve) is to be set according
to requirements of the actual condition.
Hempel's Anti-Slint 67500
Flame dried silica sand for hand spreading Pump handling
 Consult the operating manual of the equipment supplier.
Auxiliary products  During start up, it is important to fill the hose with material
Besides the abovementioned specialty products it is often using low pressure 1 – 1.5 bar input and open the 3 way
recommended to use a blast/holding primer e.g. Hempadur valve. Use remote handle (gun handle) to activate the pump.
15590 or improve resistance to sun light and prevent chalking by  Ensure that there is always sufficient material to keep a
overcoating the non-skid system with a UV resistant topcoat such constant feed of the pump. The reason for this precaution is
as Hempathane or Hempaxane. that the pump need of gravity assistance to ensure proper
suction from the can.
 When the hose is filled and there is an even flow coming out
the 3 way valve, close the valve and activate the gun. Adjust
Safety 
the pressure to obtain the flow needed.
During breaks, release the pressure on the pump, and
release pressure from hose by the 3 way valve, this will
Always use adequate personal safety equipment, follow sound prevent build up pressure in the hose causing the pump to
procedures and provide adequate ventilation. Refer to safety block.
data sheets for the relevant product(s).  If the pot life of this material is rather short and the residence
time in the hose long it may be recommended to flush the
hoses for every five 20 litre sets of material that is applied.

hempel.com Issued by BTE – August 2022

1/2
Product Data Sheet

DFT and finish related

Build-up thickness in one coat, to a closed film. Use medium to
Airless spray and hand spreading of
high atomization pressure, and a spray distance of around 40 –
50 cm. In case a rougher finish is required a second coat (wet in
aggregate
wet) can be applied at low atomization pressure and a spray
Procedure
distance of around 70 – 80 cm. As this second coat is applied
After surface preparation apply the first layer(s) according to
atop a closed-film first coat and only supposed to add roughness
specification and PDS of the product(s).
a closed film does not need be attained.
Upon application of the penultimate coat of the paint system and
Application requires a high degree of awareness and skill from
while the paint is still wet HEMPEL’S ANTI-SLINT 67500 should
the applicator. The air pressure may move material horizontally
be sprinkled evenly on the surface. Consumption approximately
across the surface resulting wobbling of the surface and
2.5 kg/5.5 lbs of HEMPEL’S ANTI-SLINT 67500 to 25 m2/ 270
variations in film thickness.
sq.ft.

When the paint is dry, sweep up loose surplus grit not adhering
Manual application to the previous paint layer. Alternatively this may be done with a
heavy duty vacuum cleaner and the grit can be reused if a clean
Manual application is possible with Hempel’s Non-Skid 45710, it collection bag is used. Do not reuse contaminated grit.
is not recommended for big areas, due to the application speed.
Manual application can be done by roller and squeegee. Apply the final coat (topcoat) according to specification.

With this method the product is being equally distributed on the

surfaced by using roller and squeegee, it is necessary to have a
strict focus on the wet film thickness, as it can easily be in the low
Painting of nuts/bolts, edges and
end. overlapping on existing paint
Wetting of the surface can be difficult by using the roller and For paint application in areas with on nuts and bolts it is
squeegee method, so it is important that the product is being recommended that they are masked of during application, and
worked well into to the substrate. protected by means of the usual paint system for the structure.
Additionally, overlapping on existing coating should be after
The easiest method is to mix the set and simply empty out the proper cleaning of oil/grease, dirt, dust, loosely adhering matter
can on the surfaced and move it out by the hand tool, having a and a proper roughening. And as we are talking overlap there is
clear estimate of how many m2 one can should cover, will make it no need to build up to a to max dry film thickness.
easier to ensure the required dft.

Control of film thickness

Overcoating
Measurement of wet film thickness is difficult due to the rough Overcoating intervals according to PDS and / or Project
surface. Correct film thickness can be achieved by this specification, depending on areas and DFT.
procedure. If the maximum overcoating interval is exceeded, roughening of
the surface is required to ensure intercoat adhesion. However
1) estimate the surface area (A in m2) to be covered. due to the rough nature of the system this is not practical and it is
2) calculate the required volume of paint (V in litres) by strongly recommended to ensure any topcoat is applied before
this formula the overcoating interval is exceeded.

𝐴 ∙ 𝐷𝐹𝑇
𝑉=
760

Where DFT is the required dry film thickness of Hempel’s Non-

skid 45710 in µm.
3) Distribute the calculated volume of paint on the area
and spread to achieve a uniform thickness.

For large surfaces it is recommended to subdivide into smaller

areas and apply steps 1-3 separately to each area.

This document is intended for professional use and provides generic advice in respect of the subject matter only. It is not intended to be used as a
comprehensive guide. The buyer/applicator should always read the relevant Product Data Sheet (“PDS”) and Safety Data Sheet (“SDS”) relating to the
Products ordered which are available for download on www.hempel.com. If in doubt, please contact your local Hempel representative for further advice. To
the extent relevant, the disclaimer set out in the relevant PDS(s) applies to this document.

hempel.com Issued by Hempel A/S – February 202122

2/2