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All products are
molded from high-density polyurethane foam, which is resistant to mold,
mildew and other fungus attacks, insect infestation, warpage (when
properly installed), cracking, crazing, most chemical compounds, and ultra
violet degradation. Of the above product qualities, UV
degradation, as contained within sunlight, is solved through the use of
quality exterior coatings, which have good opacity resistance.
Further, all products, when molded, are sealed with a prime coat which is
impregnated into the exterior surface.
Normal maintenance of the exterior product surfaces is determined by color
fading and coating oxidation rather than product degradation. Nesco
products are to be finish coated by the customer/installer in the field.
The quality of exterior paints or coatings are therefore very important
and determine the limiting factor as to when maintenance is required.
Quality exterior acrylic coatings or paints prove to be the most effective
and last from three to five years, however this varies with geographical
location and weathering exposure. Solvent coatings or paints may
also be utilized such as exterior enamels, but are more difficult to
apply.
Products, when damaged, are easily repaired using acrylic caulk or
automotive body filler products such as ëBondoí. In cases where
the damage is minor, such as nicks, gouges, surface cuts or chips caulking
is the fastest and easiest method of repair. Major surface damages
where foam material is displaced, holes, or deep penetrations occur should
be filled using automotive Bondo following that productís application
instructions. It is important that the exterior coating and factory
applied prime coat be removed to achieve proper adhesion (sanding is the
best method for this). After the repair is effected, the surface
should be coated with a heavy bodied acrylic sealer then finish coated
with the exterior trim color.
In the event of breakage, the part may be glued using any approved
exterior adhesive (see below). Nesco foam is not affected by most
organic solvents therefore solvated adhesives are most desirable. An
excellent bonding agent is 3Mís structural adhesive #2216, which is an
epoxy and has a ninety-minute working life. You can also use
Permalite Plastics ëSea-Goin Epoxy #1350.
No special materials or techniques are required in performing routine
maintenance on Nesco molded products. Most common and easily
attainable maintenance material may be utilized. If a specific
condition or situation should arise, and a repair procedure is in
question, please call our office.
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