Epoxy
Seal Coating - for steel road plates, to bond grit to the surface for skid resistanceSummary
- how to coat a steel road plate1.
Pressure Wash and epoxy solvent clean - surfaces should be mud, dust and grease
free 2.
Warm if possible in the Winter - using a dry source of heat (not bottled gas) 3.
Apply resin - Epoxy Seal Coat Clear
- 1 mm thick - about 1 litre per square metre - use a medium pile roller, brush
or squeegee 4.
Apply grit - Grit Grade Mixed 1 - 3mm - at
2.5kgs per square metre.
Click
here to buy a Road Plate gritting Kit
Typical
road plate - 8' x 4' - 1.83m x 1.22m = 2.23 square metres, allow 2.5 litres of
resin and 6kgs of mixed grit.
How
much resin do I need to re-grit a steel road plateEpoxy
Seal Coat is supplied in the Road Plate Kits at 2.5 litres per 8' x 4' plate,
(2.23 square metres), but it can be purchased separately in 1 litre, 2.5 litre
and 5 litre packs. Allow
up to 1 litre per square metre (max. 1mm of resin thickness) for mixed Grit size
1 - 3mm Accessories:
Epoxy Cleaner, 250cc, rubber squeegee
Click
here to buy a Road Plate gritting Kit
Re-gritting
a steel Road Plate - throw the grit upwards in handfuls
How
to re-coat friction surfaces on Road Plates1.
Strip any existing loose grit with a wire brush or angle grinder, grit blast or
needle gun.3. Strip the bare
surface or bald spots to clean bare metal. 4.
Clean with our Epoxy
Cleaner, 250cc to ensure
that no oil or grease remains in the metal. 5.
Regrind if necessary to eliminate any solvent cleaner smear film. Wipe over with
a clean White Cloth. 6.
Wipe thoroughly again with the White Cloth - if any dark marks appear on the White
Cloth repeat steps 4 - 6 until the cloth remains perfectly white - this is the
secret of success - any dirt left on, no matter how little, with reduce the resin
bond and lead to bald patches, where the resin has fallen off. 6.
Lay clean cardboard or plastic sheeting around the edges of the plate to catch
aggregate (grit) that falls off during coating, for re-use. 7.
In the Winter, or for cold conditions, heat the metal with dry heat - use electrical
heaters with fans. Avoid gas heating (particularly Propane), because of the water
produced, which can cause condensation on the steel and loss of adhesion. Maintain
background heat until the resin is completely hard. This may take up to 2 days
during cold weather. Lack of heat may also allow condensation to form on the resin
and the aggregate (grit) may then fail to bond properly. 8.
Apply Epoxy
Seal Coat Clear with a smooth
plastic spreader, roller, squeegee or brush, to a depth of 1mm. 9.
Apply clean, dust free Aggregate (grit) to the adhesive so that cover is complete,
with some excess. Pat the aggregate (grit) into the resin very firmly with a clean
wooden or metal object (plastering float, batten, cricket bat), or use a piece
of clean hard plastic material. It is not necessary to apply another coat of resin,
as long as the first coat is thick enough and the aggregate (grit) is fully bedded
in. 10. Leave to cure
for at least 24 hours, subject to temperatures being above 15 degrees C at all
times. Maintain the heating for the whole period. Accessories:
Epoxy Cleaner, 250cc
Click
here to buy a Road Plate gritting Kit
IMPORTANT
NOTES - applying resin to Steel Road Plates -
In cold weather you must
keep the metal surfaces above 5 degrees C. Below 5 degrees the resin curing will
slow and curing will be delayed. On
cold, damp days condensation on the surfaces or on the resin can reduce resin
and grit adhesion, so screen off the area to prevent draughts and warm up with
heaters overnight. In
Winter adjust the resin temperature by placing the pots of resin in warm water. For
cleaning, use our Epoxy
Cleaner, 250cc, cellulose
thinners, epoxy thinners, or trichlorethylene. To
save grit lay the cleaned steel plate onto a plastic sheet The
plate MUST NOT BE USED until the coating is really hard. Make a test piece
(of metal or wood) when the resin coating is complete. Coat the test piece with
resin, without grit, and leave next to the gritted area. Test by first thumb pressure
and then with a screwdriver before using the roller. When hard, the coating still
continues to gain strength over several days.
Click
for Resins and Grits in our Shop
TROUBLESHOOTING
STEEL ROAD PLATE RE-GRITResin
comes off the metal - not clean enough, too cold when coated, condensation
on the metal when coated, resin not fully cured. Grit
comes off the resin - condensation on the resin when gritted, grit too dusty,
wet grit, grit not tamped into the resin when applied, resin not fully cured. - Resin
remains sticky - not mixed fully, too cold (resin stops curing at 5C), too
damp, condensation on resin before or after gritting due to low temperature, or
through using bottled gas heating.
Grits
for metals - relining road plates, potato peelers, recoating brake rollers, blasting
and refinishing Prime
quality fused Alumac produced from stringently controlled raw materials form the
most durable grit surfaces for Brake Rollers. Al203
content 94 -99%. Packed
in plastic tubs. Grade
12, 2mm - 3mm, or Grade 16, 1mm - 2mm, or Mixed Grade 1mm -
3mm. Grit Required per
square metre, average: Allow
2.5kgs per square metre Typical
Grit Sizes used: Potato
Peelers - 24 Grit Class
4 Rollers - 12 or 16 Grit Class
5 Rollers - 12 or 16 Grit Class
7 Rollers - Mixed Grit 1 - 3mm natural aggregates Steel
Road Plates - Mixed Grit 1 - 3mm natural aggregates Grit
to excess and collect for re-use.
When dry brush off excess grit. Call
us on 01626 872886 for calculation of your Road Plate, Potato Peeler or Brake
Roller cleaning and finishing needs. Discuss
the Grades of Grit available to ensure satisfaction.
Click
here to buy a Road Plate gritting Kit
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Site written by: David
Moore
David Moore, B.A. (Hons.),
C.T.I.S., C.R.D.S. Technical Author
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