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Log Home
Log Close Up
Above: Log Home Repair with CPES with close-up of drilled and plugged logs after CPES application.
Window Sill Horn Timber
Window Sill Repair with CPES & Fill-It
Horn Timber Repair using CPES and
L & L mixed with sawdust
Click the photo to see a larger version, or click the caption to go to the article in our website to see the final result.

Wood Restoration and Repair Products
CPESThe restoration of deteriorated wood runs the gamut from the simple application of CPES to harden a soft wood surface, such as a deteriorated window sill, planking on a boat hull, a soft log surface in a log home, to the more complex restoration of house sill plates, rotten logs in log homes and the restoration of house and boat structures. Whatever the situation, as we noted above, CPES™ is always applied first. It stops the rotting process, hardens soft wood, and forms the chemical base coating for additional epoxy restoration products, should they be required.

The basic procedure is to remove any loose rotted wood, if there is any, make sure the wood is reasonably dry (slightly moist is acceptable), and then apply the CPES by brush, roller or coarse spray, whichever is easiest. The wood should be allowed to accept all the CPES it will absorb. Multiple coatings of CPES can be applied several days apart if additional hardness is required. Holes, gaps or seams can then be filled later with either our Fill-It™ Epoxy Filler or a custom filler mix made by mixing sawdust or talc to our Layup & Laminating Resin™. Both of these will cure hard in 24-48 hours and produce a repair that is usually stronger than the wood was originally.

Which exact method of epoxy repair you use will depend entirely on the depth and degree of the rot, and the configuration of the structure being repaired. The pictures to the left show a variety of rot situations and repairs. We will provide specific, detailed and step-by-step advice on wood repairs and restoration if you provide us with a detailed description and/or pictures sent to us jpeg images via email. We answer all email within 24 hours. And we always have a technician available by phone seven days a week between 6:30 AM and 5:30 PM Pacific time.




   Primary Products for Wood Restoration
CPES™: Clear Penetrating Epoxy Sealer
CPES™ is a very thin almost-clear liquid that will penetrate dry (or reasonably dry) wood. It contains, in addition to the epoxy resin, a specific blend of alcohols and solvents which dissolve saps and oils, as well as help displace the natural moisture content of wood. The resin system is derived from natural wood resin and develops a chemical adhesive bond to the wood fibers themselves. The wood is strengthened while allowing normal expansion and contraction with changes in the temperature and humidity.

CPES is absorbed through capillary action along the abnormal porosity which dry rot fungus creates within the wood, until all the affected areas are totally impregnated with the epoxy resin. CPES converts the cellulose in the wood to an epoxy-cellulose composite which returns strength and hardness to the wood, and strongly resists further attack by rot fungi or bacteria. We have never seen rot return to wood that has been treated with CPES. The penetrating ability of CPES is shown in our Product Testing Section.

CPES is also used as a coating on wood to prevent deterioration, checking and delamination. CPES is especially effective on plywood. The use of CPES as a primer coat will also greatly increase the bonding of paint or varnishes to wood or concrete surfaces.

CPES is a simple 1:1 mix and easy to apply. It’s pot life varies between 2 hours and 16 hours, depending on the formula used and the temperature. It can be applied by brush, roller, or a coarse spray. For additional information on CPES, click here.


CPES

Penetration Test
CPES Penetration Test


Plywood Test
CPES on Plywood Preservation Test


Basement
CPES injected into cracks and crevices of basement


Aplication Tools
Above: Application choices for applying CPES.
Below: CPES mixed in equal parts and applied to board and badly rotted log.

Mixed CPES

Fill-It™ Epoxy Filler
Fill-It™ Epoxy Filler is a non-sag two-part epoxy filler that is commonly used after the application of CPES™ to fill holes, cracks, seams and other parts of wood or fiberglass in buildings or boats. It cures overnight, and is easily sanded once cured. It cures just off-white but can be tinted to any tone of tan or brown with our Epoxy Coloring Agent. Fill-It Epoxy Filler can be painted over directly. It can be drilled to accept screws or nails and will not break or crack. The compressive strength of Fill-It Epoxy Filler exceeds the compressive strength of wood by a large margin. Repairs made with CPES™ and Fill-It Epoxy Filler can be considered as structural-grade repairs.

The resins in Fill-It Epoxy Filler are wood-derived. The product contains an aerospace adhesion-enhancing additive to give it aggressive adhesion to wood, cement, and fiberglass. It is reinforced with glass fibers for added tensile strength, long-term stability and moisture resistance.

To ensure good adhesion of Fill-It Epoxy Filler to a surface, the first application should be a thin film smeared forcefully against the surface. An additional quantity can then be applied to build up the required thickness. On large areas the applications can be made sequentially, allowing the first application to cure and then adding additional Fill-It to the surface. The material may be tooled smooth by placing a new piece of polyethylene (such as kitchen-wrap) over the uncured material and using a blade, squeegee or other tool to smooth the filler through the film. When cured, the film can be easily peeled off. To ensure the adhesion of a primer or paint (if desired), we recommend that the Fill-It be lightly sanded. Full cure will be obtained down to 28° F.
For additional information on Fill-It Epoxy Filler, click here.

Below are some examples of repairs made with CPES and Fill-It Epoxy Filler. Click the photo to see a larger version, or click the caption to go to the article in our website to see the final result.

Boat Hull
Boat Hull Repair
Column
Column Rot Repair
Boat Stern
Boat Stern Repair
Fill-It Filler Mixed

Above left: Fill-It parts A & B unmixed and mixed, in equal parts. Above right: Epoxy Coloring agent added to the mixed Fill-It. Below: Fill-It applied with putty knife to a badly damaged 4 x 4. Below right: tinted Fill-It applied to deep crack in log with one of our re-usable caulking tubes (10 oz size).

Fill-It Applied

L and L Flex
Demonstration of the flexibility of cured Layup & Laminating Epoxy Resin.

L and L Mixed with SawdustSawdust
Layup & Laminating Epoxy Resin mixed with sawdust into a dense putty which is applied with a putty knife.

L and L Application
Above left: L & L Resin applied (after CPES-application) to consolidate wood in a rotten log. Above right: a slurry mix of L & L Resin and sawdust is pumped into a deep crevice in a log with our re-usable poly caulking tube (10 oz size).

L and L Fiberglass
L & L Resin is used to apply fiberglass cloth to a flat wood surface.

Layup and Laminating Resin Layup & Laminating™ Resin
Layup & Laminating™ Resin is a honey-thick epoxy resin made from wood-derived components. It is a pure resin, without additives, and it retains a slight degree of flexibility when cured, similar to that of wood. To the right is a picture of a 1/16” thick sheet of fully cured Layup & Laminating Resin being bent without breaking. Other epoxies will shatter under similar stresses. Layup & Laminating Resin cures without “blushing” or emitting any other type of oily residue.

Layup & Laminating Resin is used in wood restoration and repair in two ways: 1) As a pourable/brushable thick laminate to reinforce deteriorated wood previously treated with CPES™, and 2) as the mixing base for the addition of wood flour or sawdust or talc to make an epoxy filler of any desired density. This mix, depending on density, can be poured into place, pumped in place through a caulking tube, or when sufficiently thick bladed in place with a putty knife.

Applied to the surface of moderately rotted wood that has been treated with CPES™, the Layup & Laminating Resin will settle into the grooves and cracks and form a smoother base for the application of the Fill-It Epoxy Filler or a denser mixture of the L & L Resin and sawdust. Structural strength is increased significantly.

Where the interior of the deteriorated wood is convoluted and difficult to fill with a paste filler (such as with termite damage or deteriorated fiberglass deck cores), Layup & Laminating Resin can be poured or caulk-gun-pumped into cavities. If necessary, the wood can be tightly wrapped with polyethylene (kitchen wrap) film to hold the resin in place, and then the film is removed when the resin has cured. To increase density, wood flour or sawdust can be added to make a thicker fill, which can vary from the pourable (for settling into place), pumpable with a caulking gun, to a thick, packable mix. It cures very hard in about 24 hours. It is difficult to sand once cured so the finished surface should be as formed and smooth as possible.

Layup & Laminating Resin is an excellent bonding agent for soft woods, such as plywood, pine, fir. The resin penetrates the wood surface and produces an exceptionally strong bond. Because the resins are derived from natural wood sources, it retains a flexibility comparable to wood and will not crack or shatter under compression or stress loads. The Layup & Laminating Resin is spread to about 1/16” on both surfaces and the surfaces pressed together firmly (but not tightly) for 24 hours.

Layup & Laminating Resin is also commonly used for fiberglass layup. It is simple to mix (no measuring pumps) and contains a special “wetting agent” to facilitate the absorption of the resin into the fiberglass mesh. The resin is applied to the surface and the cloth is pressed into the resin. The glass cloth will go completely transparent in a few minutes as the wetting agent does its job. Layup & Laminating Resin does not “blush”, and sanding or wipe-down is not required between resin applications.

Layup & Laminating Resin is mixed 1:1 by volume, and is forgiving of minor mix errors. Mixing by weight may be done at 10 parts “A” to 12 parts “B” by weight. For best results mix in one container, transfer to a second container and mix again. Allow to sit for 10 minutes before use. Full cure will be obtained down to 28 F. For additional information on Layup & Laminating Resin, click here.

Below are some examples of repairs made with CPES and Layup & Laminating Epoxy Resin. Click the photo to see a larger version, or click the caption to go to the article in our website to see the final result.
Termite Repair
Termite Repair
Delta's Stern Repair
Delta Stern Repair
Puff Bulwark Repair
Puff’s Bulwark Repair


   Secondary Product for Bonding and Lamination
All Wood Epoxy Glue
All Wood Epoxy Glue is a moderately thick and highly flexible epoxy adhesive which will bond oily hardwoods such as teak and apetong, as well as the softer woods such as spruce and fir. A freshly sanded or saw-cut surface is adequate surface preparation. It will also bond a wide variety of metals, glass, rubber or plastic materials. The cured adhesive is completely waterproof and weatherproof.
Glue Bond
Above: Two boards bonded with All Wood Epoxy Glue are force-separated. The wood splits away before the glue-line separates.
The formulation and ingredients are derived in large part from the natural resins of wood itself, which accounts for its toughness, flexibility and natural compatibility with all species of wood.

All Wood Epoxy Glue is mixed one-to-one by volume and is forgiving of minor mix ratio errors. Mixing by weight may be done at 10 parts “A” to 12 parts “B” by weight. For best results mix in one container, transfer to a second container and mix again.
The picture to the right shows a curved stern rub rail on a boat which was constructed by bonding together 1/4” fir planks with the Tropical Hardwood Epoxy Adhesive. Impact resistance and cured-flexibility were the reasons the Tropical Hardwood Epoxy Adhesive was used for this application.

For additional information of All Wood Epoxy Glue, click here.
Delta Stern Lamination
Rub Rail Lamination



www.rotdoctor.comWood Treatment & Preservation Products
OrderProductsUsing EpoxiesUsing PolyurethanesTestingWooden BoatsFiberglass BoatsHomesLog HomesQ & A
IntroductionRepair ProductsCompatabe PolysApplication

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