is a permanent antifouling coating developed in Australia by BoatCraft
Pacific to meet all current ecological requirements.
There has been much concern over the build up of heavy metals in marine
organisms resulting from leaching and ablative antifouling coatings (TBT’s
and similar). So we went back to first principles, knowing that one of
the most effective and safest treatments is a sheathing of copper
metal. Its major drawbacks are weight and cost, due to difficulty of
application. Our aim was to develop a coating which would expose a
complete copper surface over the whole bilge area of the boat, but also
have benefits of ease of application, light weight, and minimal cost.
epoxy technology, we have combined a strong, durable epoxy coating with
finely divided pure copper, to produce a coating which is three quarters
copper metal. It can be applied by spray, roller, or brush, cures in a
few hours, and leaves exposed a pure copper surface strongly adhered to
the hull of the boat.
COP-R-BOTE is suitable for all timber, fibreglass, and ferro-cement
craft. COP-R-BOTE is not recommended for coating steel vessels. It must
never be applied to any aluminium or alloy boats, nor come into direct
contact with outboard motors, stern drives, zinc anodes, etc. Serious
electrolytic corrosion can result from such metal to metal contacts.
COP-R-BOTE is beneficial on fibreglass and ferro-cement hulls as its
epoxy base actively prevents osmosis - the permeation of water into the
structure of the hull which causes gel coat or paint blistering.
COP-R-BOTE effectively limits attachment and growth of a wide variety of
marine organisms. Some bacterial slime may develop on a hull protected
with COP-R-BOTE, and limited amounts of weed may in turn develop in the
slime. It is recommended that this be removed regularly by light
is available in colours red, blue, green or black. The colours will
change with time and take on more weathered copper appearance as the
exposed copper develops its natural tarnish layer.
DIRECTIONS FOR USE
Cop-R-Bote can be applied over a two pack base such as Bote-Cote
or another epoxy system, directly onto polyester fibreglass or gel coat,
or onto ferro-cement.
Surface preparation: Remove all loose, degraded or single pack
paint and all old antifouling paints especially ablative or leachable
types which do not provide a firm base. Wet sandblasting is the most
efficient technique for surface preparation. Observe all safety,
hygiene, and waste disposal rules for any such cleanup process, as many
such coatings contain toxic ingredients, lead, or other heavy metals.
Fill any imperfections with filled Bote-Cote. Sand the surface to the
Unpainted timber boats should be primed with 2 coats of Bote-Cote
epoxy – refer to booklet “Boat Building with Bote-Cote”. Apply COP-R-BOTE
directly over other surfaces provided they are clean, in sound
condition, and are well prepared.
*Fibreglass and ferro-cement
boats should be primed
with one coat of Bote-Cote
*Lead keels should be sheathed
with fibreglass to
provide solid protection from
in the event of gouges from
Allow all previous coats to dry thoroughly, then sand lightly to
present a smooth clean surface. Wipe with a cloth dampened with COP-R-BOTE
solvent to remove dust immediately before painting.
Mix COP-R-BOTE resin thoroughly before use, ensuring that all the
copper is stirred into the liquid. Copper is very heavy and partially
settles in the can.
Measure the resin and hardener in a ratio of two volumes of resin
to one volume of hardener. Do not depart from this ratio, do not add
extra hardener for any reason. Mix thoroughly.
Apply this mixed COP-R-BOTE by spray, roller or brush. The pot
life of the mixture is 2 – 6 hours, depending on temperature and
volume. It is necessary to stir frequently during use to maintain an
even suspension of the copper particles. Ensure a surface finish as
smooth as possible, to eliminate brush marks, roller stipple, etc, as
this will make subsequent burnishing more arduous (section 13).
For spraying, the recommended equipment is a gravity feed gun
with a 1.8 or 2.0 mm tip. Avoid thinning as this allows copper to
separate faster. A well stirred pressure pot is an alternative.
Conventional suction guns cannot be used as copper is too heavy.
When spraying it is important to take full precautions to avoid
breathing the vapour or having it get onto unprotected skin. A clean
air supply for the operator is recommended. Refer to the health and
safety directions in this brochure
Allow sufficient time for the COP-R-BOTE to become tacky, then
apply a second coat. If a longer time elapses between coats, and the
surface sets hard, it will be necessary to sand between coats.
The coverage of COP-R-BOTE is 10 – 12 m2/l/coat, i.e.
the total application will require 0.2 litres per square metre.
COP-R-BOTE may be applied at all temperatures above 12oC.
pot life appears too short at high temperatures, mix smaller quantities.
Bote-Cote accelerator can be used to speed up cure in temperatures
between 12oC and 20oC.
After the final coat of COP-R-BOTE has cured, the surface must be
fine sanded using #150 grit or finer abrasive paper, to burnish the
surface and expose the copper particles. This most important step must
not be omitted. The antifouling effect will be seriously diminished if
the copper remains hidden beneath a film of epoxy. Sanding will also
produce a desirably smooth, slick surface finish. If patches of copper
remain unexposed due to surface roughness, brush marks, etc, stainless
steel wool may be used to work into such areas and complete the
COP-R-BOTE should be thoroughly cured before launching the boat.
There is no time limit between application and launching.
All application equipment should be cleaned thoroughly with
solvent such as acetone or similar before any material starts to set.
It is desirable to leave brushes etc soaking in solvent overnight to
remove the last traces of COP-R-BOTE.
Use detergent or hand cleaner to remove COP-R-BOTE from the skin,
never use solvents. Do not smoke or allow any naked flames near
containers of COP-R-BOTE or solvents, nor during application of COP-R-BOTE.
Keep out of reach of children.
CAUTION ON APPLICATION
Ensure that COP-R-BOTE does not contact, or make direct or
indirect electrical contact, with any metal on the hull other than
stainless steel, copper, or brass – especially zinc anodes, and any
aluminium or alloy fittings such as stern drives, or, of course, a
metallic hull itself. Contact with such metals can set up electrolytic
cells which can either negate the antifouling effect, or cause serious
Ensure that COP-R-BOTE does not contact any metals which are
connected to the boat’s electrical system – radio grounding plate,
propellor shafts, through-hull fittings which are earthed to the
Leave a 25 mm minimum gap
between all such fittings and the COP-R-BOTE . Manually de-foul this
gap periodically as required.
Periodic cleaning will be necessary to
remove bacterial slimes and associated light growths. These are easily
removed, and the boat may be brushed with a soft broom, sponged by a
swimmer, or hosed down on a hard stand between tides. No pollution will
enter the water from the COP-R-BOTE. The cleaning frequency will depend
on the water quality, temperature, and amount of use of the boat. In
polluted waters with a high nutrient load it may be necessary to revert
to a strong ablative antifouling paint. These may be applied directly
to a sanded COP-R-BOTE surface.
RECOATING AND REPAIR
COP-R-BOTE is expected to last several
years before recoating may be necessary. A single recoat is all that
should be required to restore the surface to its full activity.
Scrub away any growth which may have taken hold on the surface.
Sand the surface only enough to completely clean the weathered
outer layer and smooth any imperfections. It is undesirable to sand
away any more COP-R-BOTE than is necessary to obtain a fresh clean
Fill any imperfections with filled Bote-Cote, allow to cure, sand
Spot prime any bare or thin areas with COP-R-BOTE, allow to set
Apply a full coat of COP-R-BOTE to the entire bilge area, noting
all details described above for new applications.
HEALTH AND SAFETY
Refer to full Material Safety Data Sheet available.
Avoid contact with skin and eyes. Do not ingest. Wear suitable
protective clothing, including complete coveralls, rubber gloves and
safety glasses or a face mask. Avoid breathing vapour by working in a
well ventilated area.
Remove any COP-R-BOTE spilled on the skin immediately with detergent and
water. Do not use solvents on the skin. Change and dispose of
COP-R-BOTE contacts the eyes, flush immediately with water for 15
minutes and rinse with eye wash solution. Seek medical attention if any
Some individuals may become sensitised to the hardener components in
COP-R-BOTE. An irritating rash or breathing congestion are the usual
symptoms. If this occurs, cease using any epoxy materials and seek
COP-R-BOTE contains flammable solvents including xylene. Avoid all
naked flames near containers or when working with COP-R-BOTE. Never
smoke when using COP-R-BOTE. Do not allow containers of mixed COP-R-BOTE
spraying COP-R-BOTE ensure all industrial hygiene practices are
observed. Wear full protective clothing. Wear a respirator fitted with
organic vapour cartridges. Avoid spray drift to other people nearby.