After an exterior staining project with TWP, Total Wood Preservative Stain you may have some extra left over. Or you may have bought some TWP wood stain intending to use it and just haven’t got around to it. Whether you have some left over or the season ended before you could use it, TWP wood stain will store and keep fresh with proper care.
TWP Wood Preservative has a shelf life of several years if it has been unopened. So if you ran out of time at the end of the season do not worry, you can still use it when you are ready. If the TWP stain has sat around a while, it is recommended to take the stain to a paint store and have them shake the cans up before using them.
If you used TWP stain and have some left over, the extra will last 1-2 years as long as the lid is completely resealed. If the lid is not sealed properly evaporation of the stain solvents will occur and the stain will become thicker and be rendered useless. Be sure the lid is completely sealed to stop any evaporation from happening. This will ensure the left over TWP can be used on your next wood maintenance project.
Tips for Storing TWP Wood Stain
When storing TWP stain it is best to keep it in a cool dry place preferably at room temperature.
It should be kept out of direct sunlight if possible.
Oil based stains like TWP can be stored in colder weather and in some instances even below freezing. The oil formula will simply thicken, unlike water-based stains that would actually freeze solid. With that said if you have a choice and can bring the stain into the basement or partially heated garage for the winter that would be best.
If you have several partial cans of TWP stain it is best to combine them to make a full can. The less empty space in the can the better. Air above the stain will cause a skin or gel to form on the surface. This can be removed but it is better to have one full can and just a little left in another than to have two partially half full cans of TWP stain.
Be sure the lid is on tight to eliminate the solvents from evaporating.
As soon as you finish a project it is helpful to mark on the lid what you used the TWP stain for. This way when you use the stain a year or two later you won’t have to guess.
Follow these storage tips to increase the shelf life of your TWP wood and deck stains and they will last for several years saving you money.