Detailed Product Description:
Smith’s “Multi-Wood Prime” (also known as “Clear Penetrating Epoxy Sealer”
or CPES) consists of a tough, flexible resin system in a solvent blend which
dissolves the sap, oil and moisture found in wood.
The resin system is derived from natural wood resins and develops a chemical
adhesive that bonds the wood fibers to themselves. The resins from each form
a bond which prevents coating adhesion failure. The wood is thus strengthened
while allowing normal expansion and contraction with changes in temperature
Paint or varnish will last longer because the paint has a strongly attached, chemically
compatible surface to which it becomes bonded.
It performs the multiple functions of promoting topcoat adhesion, neutralizing wood
acidity, sealing surface porosity, impregnating sub-surface porosity, blocking tannin
bleed, resisting coating failure, and toughens a soft surface so it can be lightly
When repairing wood that has mild dry rot, the CPES will migrate along the abnormal
porosity which dry rot fungus creates within the wood, as long as it continues to be
fed in. Impregnation of wood with CPES changes the cellulose of wood into an
epoxy-impregnated cellulose composite which resists further attack by fungi and
bacteria while reinforcing the wood, accomplishing restoration. The long working
time (pot life) of this product provides a long penetrating and moisture-dissolving period.
Other primer formulations have not kept up with the changes effected by governmental
legislation which forced topcoat manufacturers to remove key ingredients because of
environmental issues. Additionally no other primer was ever able to fully impregnate
the porosity of old, weathered wood and new, sound wood. Also note that most of the
lumber being sold today is not of the same quality as it was when the original primers
MultiWoodPrime is designed to impregnate wood. It has an extremely low viscosity—
virtually like water. All of the product goes into the wood, gluing the fibers together.
Total immersion of the wood is optimal. In some cases immersion is not viable, such
as when the individual components of the millwork have already been assembled.
Application may be by brush, roller or immersion. Spraying is not recommended as
a portion of the solvent component will evaporate in transit. When applying by
roller on a vertical surface, hold the roller only horizontally and slowly roll only
upwards. Keep rain or dew away from areas being treated with CPES until solvents
have evaporated out of the wood. This will take at least a day and may take a week
or more, depending on the extent of deterioration, how deeply the CPES soaked in
and the daily temperature swings.
When treating rot inside sound wood, drill a hole that intersects the rot, glue a funnel
in the hole, and use the Cold Weather Formula to impregnate the region. Allow sufficient
time for solvents to diffuse and evaporate out of the wood before applying fillers or glues.
Removing paint from all sides of wood to be treated speeds solvent evaporation, as does
1 part resin (Part A) to 1 part accelerator (Part B) by volume
4 hours at 86˚F
8 hours at 68˚F
16 hours at 50ºF
2 days at 86˚F
4 days at 68˚F
8 days at 50˚F
Combustible mixture. Keep from flame and ignition sources.
Use with adequate ventilation.
Half-Gallon kit comes packed in pair of 1-quart cans