PETRI-WOOD APPLICATION INSTRUCTIONS

Petri-Wood will effectively penetrate any previous applied stains or coatings but be advised that pre-cleaning or removal of foreign elements will always create a more eye appealing result. The use of a High Pressure Washer and/or Deck Cleaner will help in the restoration of the original appearance of the timber by removing the UV graying and impregnated dirt particles. Numerous deck cleaners are available for this purpose. None of these will compromise the Petri-Wood treatment.

Note on Pressure Washers

It’s very important if you have not used a pressure washer before that you practice first to make sure you do not scare the wood.  You should always use the lowest pressure and largest tip size that will clean the wood sufficiently, quickly, and with minimal chance of scarring damage.

Make sure any raised  nails or screws are set back into the wood.  Once you apply the Petri-Wood, these will be locked in place and will be difficult to remove. 

Always remember to cover any existing plants or grass in the immediate area.  You are spraying a penetrant that will render the plant moisture free.  When you have completed the job it is always a good idea to soak the surrounding area down with a water hose, just in case.

Safety Equipment:  

Wear googles to protect your eyes.  Avoid contact with skin and wear rubber gloves when applying. To avoid breathing fumes, wear a respirator  especially if applying indoors or in an enclosed area,

Application Timing:

Application is best accomplished in the heat of the day. Wood expands and contracts with heat until it is treated with Petri-Wood Application in warmer temperatures accelerates the penetration levels by expansion of the wood and will subsequently shorten the application time. Application Rates:

Note: You only need to do one side of the wood, as it will be absorbed through out the entire wood structure.Always work in a maximum area of 100 sq. ft. Do not let the wood dry completely between coats of Petri-Wood.

Example:  If you're doing a 400 sq. ft. Deck you would start at one end and do 100 sq. ft. when you are done, you will then go back to where you started and do it again, and then one more time completing all 3 applications before moving on to the next 100 sq. ft.

Horizontal Treatments:

Apply Petri-Wood to a defined area of approximately 100 square foot or less. Using the sprayer wand or spray head, discharge the liquid in a spray or mist, holding the nozzle very close to the wood. You can also apply with a brush. On horizontal surfaces keep applying the fluid until the surface appears glossy wet. Return to the starting point and reapply again when the solution has soaked into the wood. Repeat at least three times or until the last application appears to be resisting rapid penetration.  

    Petri-Wood  will then wick itself into the wood and the fluid will migrate vertically and horizontally throughout the fiber structure. Move on to the next designated area and repeat the above process. Make sure that you have enough liquid to finish the defined area as partial treatment will not produce a permanentresult. Treatment from both sides is not necessary however adequate amounts of  Petri-Wood  must be applied to insure total penetration.

For added Ultra Violet surface protection you can re-treat the surface with Petri-Wood at any later date. The absorption at that time will be minimal and the solution will be contained to the top surface area of the wood.

Vertical Treatments:

When treating Vertical surfaces, start at the top and treat in the direction of the bottom allowing any run off to be utilized by the untreated wood. Patience must be practiced when applying vertical surfaces as keeping the wood surface wet with solution is more difficult than on horizontal areas. Sometimes the use of a brush is more appropriate than the spray nozzle.

     Application with a airless gun is desirable for large areas such as Log Cabins and Fences. The Airless gun will inject the fluid instantly into the wood triggering a rapid wicking of solution and eliminating any tedious application efforts. Airless units are available at your local rental store. Be sure you request the SMALLEST NOZZLE available for the gun.

Application of Stain or Paints

Oil based stains or paints are recommended for application to Petri-Wood wood. These type of coatings are more adaptable to a solvent treatment than the water based formulas. However, either can be used effectively and without any issues. A 24 hour waiting time is recommended for Oil Based Stains or Paints. A 72 hour waiting time is required for Water Based Stains. Surface wear areas such as walkways and heavy traffic will experience higher levels of wear resistance when coated with oil based products. Paints and Stains will experience a extended adhesion when applied over wood treated with Petri-Wood as the wood will no longer "move", the phenomenon that is responsible for rejection of all deck, dock, fence coatings and paints.

Clean-Up of Equipment

Clean up is easy with Petri-Wood. There is none ! Simply put the cover back on the unused product and store in an area free from any open flame. The product has a perpetual shelf life and will always be ready for you to use on the next project.