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The varnish gets dull after a year or even six months It cracks, peels and comes off the next spring
and one has to start all over again.
Help has arrived:
Now there is a modern way to improve the surface protection of your boat.This will help maintain
the natural beauty of varnished wood and survive all the conditions of weather in your climate and
the environment.
Lignu(R) Impregnating Resin impregnates the wood substrate with a water-repellent polymer made
largely from the natural resins of wood itself. It bonds the varnish or paint to the wood with a
tough, flexible adhesive. This bond is stronger than the bond of varnish directly to bare wood.
This creates better water resistance of the wood substrate as well as better topcoat adhesion.
The process of restoration begins with the removal of completely
decomposed wood, as shown in examples #1 & #2.
The restorable wood is
then impregnated with the Lignu Impregnating Resin (example #3).
Missing portions of the original wood are then replaced with a filler
(example #4) made largely from the natural resins of wood, as is the
Lignu Impregnating Resin. When the filler cures, it will have a
flexibility comparable to the original wood.
The filler may be easily shaped to the original contour (example #5
and #6).
Before painting, one more coat of the Lignu Impregnating
Resin helps the paint bond better to the wood and filler.
The final result is deteriorated wood restored, capable of many
additional years of service.
Glu-Lam Impregnation Comparison
These two
laminated beam sections were adjacent slices, cut
side-by-side and one
treated, so you could compare the
almost-identical wood before and after
impregnation. The fungi that
cause rot leave an abnormal porosity in
apparently-sound wood near the
decay. This is why rot starts up again behind
conventional repairs
with other products.
The slice on the right was
treated with Lignu ® Impregnating Resin
dyed blue, so that regions of
abnormal porosity would be visible after
impregnation. The wood was placed in
a shallow tray and the liquid
wicked up into the wood. In only a few minutes,
in regions where the
fungi had eaten the wood, the dyed resin was now
visible. The Lignu ®
Impregnating resin penetrates deteriorated wood much
more than sound
wood, because it has more porosity.
These regions are now impregnated with a highly rot-resistant
and
water-repellent resin, and useful mechanical properties are
restored.
This treatment improves the ability of the wood to resist
further
deterioration.
This is the first step in the restoration process. When finally
painted,
the impregnating resin glues the paint to the wood, so it
sticks better and
lasts longer.
IMPREGNATION OF WOOD
Facts about the Lignu
technology
The above diagram shows the distribution of stress failure for
naturalwood specimens in a standard test fixture.
This diagram shows the
distribution of stress failure for woodspecimens that have been impregnated with
the Lignu ImpregnatingResin.Note that the average strength has increased to 141%
of original.Note also that the strength of the weakest untreated specimens
hasbeen doubled by the impregnation treatment.
Depth of
impregnation
A blue dye was added
to our impregnation in order to show the depth of
penetration. Notice how
penetration follows the pattern and direction
of the grain. Notice the extent
of impregnation into the deteriorated,
porous wood near the nail, which
penetrated the wood and thus allowed
fungi to enter and follow the
grain.
Water absorption after water immersion.
The water absorption of wood specimens before and after
impregnation
is shown, for a deteriorated Douglas fir 2 x 2 and a new
cedar
shingle. In both cases the water absorption is dramatically
reduced,
but it is clear that the wood is still allowed to breathe
naturally,
otherwise the water absorption after impregnation would have been
zero.
- Before impregnation of deteriorated Douglas fir.
- After impregnation of deteriorated Douglas fir.
- Before impregnation of new cedar shingle.
- After impregnation of new cedar shingle.
In America Lignu ®
Impregnating Epoxy is also known as MultiPrime or CPES
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