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Featured Product

Perma-Chink is a flexible, textured log home chinking that seals the open gaps between logs to eliminate heat loss and air infiltration. Even though it looks and feels like traditional mortar, it's not. Perma-Chink is a pure acrylic that adheres to logs and stretches to maintain a tight seal by following log movement.

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DIY Section

Find How-Tos, Tech Tips, and Videos regarding our family of products.

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Restore

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Restoration products to remove old finishes and make dirty or weathered wood look like new.
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Preserve

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Special purpose wood preservatives to protect against termites, insects, wood rot, mold and mildew.
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Stain and Finish

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Beautiful wood finishes protecting your log home and bringing out the beauty of your exterior, interior, decks and millwork.
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Seal and Chink

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Flexible log home sealants for every weather-proofing job around your chinked or timber style log home.
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Water Stains

Some of the most challenging discolorations on wood are water stains. They can run the range from light brown to jet black, and can appear on both interior and exterior surfaces. How do water stains form? All wood contains a number of components that are grouped under the category of “water-soluble extractives.” In other words, they can dissolve in water and as the water within the wood evaporates, they can be carried along to the surface.

Generally if wood is exposed to water for only a brief period of time, the water does not get a chance to penetrate deep into the wood and dissolve these water-soluble components. However, if the wood is exposed to water for days, weeks, or months, the water can pick up a high concentration of these components and deposit them on or near the surface of the wood.

Exterior water stains typically occur around checks, fissures, and other openings that collect rain water. The water soaks into the wood and as it evaporates out of the wood, it brings along the colored extractives which can then become visible on the surface. In some cases, water-soluble tannins may react with minute particles of steel on the surface, forming dark iron tannate stains.

This process may occur on bare wood or under an existing finish. Interior water stains typically develop during construction before the home is sealed or from an ongoing water leak. They can be particularly ugly and may cause a lot of distress.

Getting Rid of Water Stains

As previously stated, water stains can be just on the surface or they can go deep into the wood. The first step in determining a course of action is to find how deep the stain goes into the wood. Remove about a 1/16” thick sliver of the discolored surface with a sharp knife, and if the discoloration comes off with the sliver, the discoloration can usually be sanded off or treated with products like Log Wash™, Wood ReNew™, or Oxcon™.

Since there are a number of components involved with water stains it’s impossible to predict which product will work best. We recommend starting with Log Wash and if that does not work, move to Wood ReNew, and finally Oxcon.

The problem is that even these products don’t always work; sanding may be the only solution. If the discoloration goes deep into the wood, still visible after the sliver of wood is removed, it will be virtually impossible to either sand or chemically remove the water stain. In this case there are only two options: replace the discolored wood or hide the stains.

Hiding Water Stains

Although Perma-Chink Systems manufactures and sells transparent finishes, some of our colors are fairly heavily pigmented which gives them some hiding power. On interior bare wood surfaces, Butternut is a good choice, since it is very close to the color of bare white pine. It may take several coats depending on the darkness of the discolorations.

If a colored stain is going to be applied later, it would be a good idea to apply Prelude over the entire wall once the water stains are hidden to even out the absorption of the stain and obtain a uniform final color. For hiding very dark discolorations, one or two coats of Kilz® primer will hide virtually anything. Kilz is available in both water and solvent-based formulations, but only comes in white. However, it can then be coated with our colored stains and although it may not result in an exact match with the rest of the wall, it will definitely look better than the dark, visible water discolorations.

The best way to hide exterior water stains is to use a dark colored finish like Walnut, one of our gray colored finishes, or our wheat colored finish. If this is not to your liking, you can try using the same hiding procedures as stated for interior stains, but on exterior walls the opaque finished areas tend to be more pronounced than on interior surfaces.

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Last modified on Tuesday, 17 July 2018 23:32

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Your Wood Care Resource

Although Perma-Chink Systems (PCS) is the largest manufacturer of log home chinking and sealants, we make a complete line of quality wood care products. Wood Finishes, Wood Preservatives, Wood Cleaners and Restoration Products all are Made in the U.S.A. 

In 1981 PCS introduced flexible chinking to the log home industry to replace what was the standard at the time - concrete mortar. This revolutionary product, Perma-Chink Log Home Chinking, looked like authentic mortar but stretched and flexed to accommodate log movement while maintaining a tight seal for the life of the house.

Perma-Chink Systems is the log home building industry's trusted partner for the tightest, greenest, and most impeccably finished log homes in the world.

 

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