THE ANTI SLIP / NON SKID
GRIT ADDITIVE PAGE
Grit products for Anti Slip info - options
Information on various grits and additives for paints and epoxies for anti non slip
Your Host and Tour Guide:
Paul Oman, MS, MBA - Progressive Epoxy Polymers, Inc. (floor epoxies, marine epoxies, underwater epoxies, repair epoxies)
Member: NACE (National Assoc. of Corrosion Engineers), SSPC (Soc. of Protective Coatings)
"Professionals helping Professionals"
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This was a difficult page to write. I thought about it for over a year. How does one get across the size of various
grits and how they look or feel in a thin coating or in a thick coating? I even purchased a stereo microscope just
so I could evaluate the different grits.
I settled on using ground coffee as the 'baseline' size of 1. Later I took a mm ruler and estimated that my '1' was about 0.66 mm in dia. Here is my best effort at getting this grit info available to you!
GRIT
APPARENT SIZE
ESTIMATED ACTUAL DIAMETER
TEXTURE/FEEL
FIND MARINE CAT
FIND INDUST CAT
extra course walnut (1)
1.75
CLICK HERE
ground coffee (3)
1.0
0.66 mm
med/course walnut (4)
1.0
CLICK HERE
CLICK HERE
Rustoleum grit (5)
0.4
sharp
sugar (6)
0.3
40 grit sandpaper (7)
0.3
sharp
60 grit sandpaper (8)
0.25
sharp
80 grit sandpaper (9)
0.2
sharp
fine walnut (10)
0.2
CLICK HERE
CLICK HERE
150 grit sandpaper (11)
0.1
sharp
our micro sphere filler (13)
0.03
We also sell a very fine white grit for use in solvent based coatings (which shrink down when the solvents evaporate). Called S-15, this grit is the only one that turns clear/invisible in clear coatings. Ideal for a 'fine' texture in varnish, 2 part polyurethanes and other high solvent coatings. Probably way to fine for use with any epoxy except perhaps our solvent thinned ESP 155 sealer. We sell a one pint unit of this product. CLICK HERE (marine or industrial) for more info.
NOTES:
A) we don't sell the ground coffee (#3), the Rustoleum grit (#5), the regular sugar (#6), or the sandpapers. The micro sphere filler is an epoxy thickener included here for comparison. It is not an anti slip grit.
B) under a microscope the walnut shells look like croutons!
2) the rubber grit gives a coarse but soft/rubbery finish like you might expect on a professional diving board.
Fine walnut grit - brown grit is ground coffee
medium/coarse walnut grit - brown grit is ground coffee
extra coarse walnut grit - brown grit is ground coffee
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This current page is all about:
Grit products for Anti Slip info - options
Information on various grits and additives for paints and epoxies for
anti non slip
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Three ways to 'apply'
1) mix the grit into the coating and roll, brush apply. Notes: using a roller gives a more uniform finish than a brush. larger grit is needed for thicker coatings as the finer grits will disappear in the thick coating. The result is an individual grit piece here and there - functional but not too pretty. You can try out your grit by mixing it into some leftover latex paint. This method has problems with very thin, watery coatings. Also, if you are using 'regular' sand don't use this method as the sand may not stay suspended in the paint long enough to get it on the roller.
2) apply the coating and then sprinkle the grit upon the coating and go back over it with the roller/brush. This
is the method when using 'regular' sand. It also works with the other grits. It allows you to decide how much or
how little 'texture' you want. Best use of this system is painting a garage floor (CLICK HERE). If using sugar/salt
as the grit (which you then dissolve away. The resulting voids produce the anti slip texture) you don't back-roll
or brush over.
3)'broadcast to excess' - you completely cover the surface of the coating with enough grit that none of the coating
(or even shiny spots) shows thru. This gives the most uniform, most durable, most attractive results (looks like
sandpaper - to really see/feel the affect brush a thin topcoat of latex paint over the sandpaper). With this method,
after the paint has dried you sweep/blow/vacuum the excess grit away and apply a thin 'sealing' topcoat over the
surface. More info found on our QUARTS BROADCAST PAGE - CLICK HERE.
------------------------
Observations/guidelines
I applied the various grits to our CM 15 epoxy paint, which is a med thick epoxy (similar to floor epoxies or marine
epoxy) both by 'mixing in' and by broadcasting on top. Comments are for both application methods.
The fine walnut felt and looked much like 80 grit sandpaper. Probably best to broadcast upon the coating. I think if mixed into a thicker coating (or if was testing on a rough surface rather than using a tiny brush on a smooth surface) the texture could be lost within the coating (maybe - maybe not).
For folks wanting something a bit rougher (or one that would survive a few layers of 'replacement' paint on top) the med/coarse walnut seemed fine.
The rubber grit and the extra coarse walnut produced a very bumpy/rough surface. Perhaps more than most folks would want on a boat etc. I think in areas where there might be a lot of dirt or oil etc. on the floor (like a garage workshop or food kitchen) and where 'less rough finishes would get buried or overloaded' these produce a suitable thick texture.
I would suggest applying the grits into an epoxy or latex, or enamel base and if top coating, topcoat with thinned epoxy, latex, or enamel.
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Grit products for Anti Slip info - options
Information on various grits and additives for paints and epoxies for
anti non slip