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IMPEL Rods™
The Total Wood Restoration System


highly effective in controlling decay fungi that can cause strength loss and eventual structural failure in untreated wood.


Safe to use, Cost Effective EPA approved as a decay protection and prevention system for application to existing wooden structures. Comes in a variety of convenient sizes for a variety of applications.

Below are samples imagesfor procedural Installation...



Impel® Rods
Procedure Instructions

  1. Look around for the source of moisture. If there is rot, there is excessive moisture. If you can determine the source, try to divert the water away from the wood. While it is not always possible to find the source, flashing, caulking, gutters or downspouts will often help.
  2. Excavate the rotten wood. This can be done with a die grinder, chisel, wood carving tools, or drills. It is best to grind back until you see bright wood. However, you don’t have to get every spec of rotten wood out, just the compost and crumbly wood. Hint: Have a shop vac handy to suck out the dust and crumbly wood so you can see what you are doing. Also, some people are sensitive to molds and fungi. Wear a dust mask and safety goggles.
  3. Remove the paint in the areas that are affected. Often times a small crack in the paint has allowed water to come in contact with the wood and keep it wet. It is advisable to scrape or sand the sills to remove the paint. After the repairs are made, the area will need to be primed and painted anyway, so it’s best to start over from bare wood.
  4. Depending on the size of the wood, determine the size of IMPEL ® Rod (from the chart at Wood Care Systems) and drill the appropriate holes beginning at 1/2” from the outside of the rotten area, and then another about 2” from that area. Do this on both sides of the repair, along the grain. IMPEL ® Rods diffuse better along the grain than they do across it. Therefore, stagger the holes to take advantage of the natural pathways of water in wood. When the wood is greater than 2”, you should plan on drilling a deeper hole and putting two or three rods in each hole. IMPEL ® Rods will slowly dissolve and release borate wood preservative over a long period of time inside the wood. This is the long term insurance policy against re-occurring rot and is the key to the success of this repair.
  5. Mix up a batch of Borate Solution and pour it into your trigger sprayer or squirt bottle. Spray the cavity you excavated and the holes you drilled. This will kill the decay fungi and poison the wood as a future food source. It will penetrate in about 1/4” to 1/2”or more from the surface. Allow at least one hour for it to soak into the wood. You can wait several days before the next step, but make sure the hole you excavated is protected against rain. If the void fills up with water, it will render the treatment ineffective and it will have to be re-applied.
  6. Install the IMPEL ® Rods into the holes you drilled.
  7. If the cavity is still damp, use a hair dryer or heat gun to force dry it. Mix up a few ounces of ROTFIX ™ . The amount you mix up must be used quickly. When the temperature is above 75 degrees, you only have about 10 minutes before it gets very hot and begins to harden. Using the mixing bottle and a small paintbrush, apply ROTFIX ™ to the entire surface of the cavity. Apply it liberally. You cannot use too much. DO NOT apply ROTFIX ™ to the holes you drilled for IMPEL ® Rods.
  8. Estimate the amount of SCULPWOOD ™ you will need to fill the void. Start with a relatively small amount, like a golf ball size of A and a golf ball size of B. Knead the two together thoroughly until there is one consistent color. If A and B are not mixed properly, the reaction will not take place and your repair will fail. Ball it up and flatten it out several times to mix. When it is warmer than 75 degrees, keep it as flattened out as possible to avoid heat buildup and hardening before you are ready for it. Start filling in the void in layers about 1/2” thick. Pack in the SCULPWOOD ™ so it comes in contact with all surfaces of the void. Build it up slightly higher than the finished surface and try to sculpt the final shape. It does not have to be perfect because you will sand it flush after it cures. Seal the holes that contain the IMPEL ® Rods with the remaining SCULPWOOD ™ . If the void is large, you can coat treated wood chunks with ROTFIX, then fit them into the void. Make sure you leave no air pockets. Rebar or fiberglass rods can also be used when structural integrity needs to be restored.
  9. Allow about 4 - 24 hours for the wood filler to cure hard enough that it can be sanded without crumbling. Use an orbital, belt or detail sander, to get the rough shape, but use a planer or block sander for the fine details. Be careful not to over sand or sand too deep.
  10. Vacuum or wipe down the sanded repair, clean the window and surrounding area. Apply a coat of TIMBR Prime ™ by brush or spray to the area that will be repainted. Not all primers will stick to epoxies. This one will.
  11. Caulk opened miter joints and all areas water may seep in with high quality sealant.
  12. Repaint with two coats of 100% acrylic latex exterior paint.


This process revitalizes the usability of a window, door, column, beam or log that was once damaged to a point that replacement was the only option. Now, you can combine proven technologies to stop the rot, prevent its return and restore the integrity of the wood at a fraction of the cost of replacement.
Material Safety Data Sheet