SOUFA is a water-based boric acid wood preservative (termite preservative). There is no acute toxicity to the human body. (*According to our test results)
There are two main types of native Japanese termites, Cercidiphyllum and Yamato termites. These are thought to enter the interior of homes from the ground, so treatment at a depth of one meter above ground level is generally considered safe. However, there are also non-native American White Termites that have been observed throughout Japan and are commonly found in warmer regions such as Okinawa. These termites have feathers and have been found to enter through attics.
That’s why we recommend treating all wooden parts of the house with SOUFA, which is safe and does not volatilize, so it doesn’t cause sick building syndrome and can be used safely in households with chemical sensitivities, pregnant women, and baby pets.
We recommend a professional contractor with the right knowledge for accurate installation. The following is a rough guide to installation.
(1) Cleaning and polishing the surface of wood
– Clean and polish the surface of the wood to facilitate the penetration of the water solution into the surface of the wood.
When insects are found in the wood, they are exterminated as appropriate.
– Curing of the floor at the installation site and also the floor of the installation site of the solution.
– Curing of the part corresponding to the wall other than the construction part by masker.
– Curing of the floor at the construction site and the floor of the installation place of the solution.
③Set up installation tools
– Prepare brushes, rollers and sprayers.
4) Preparation before application
– It is desirable to keep the temperature of the aqueous solution at 40-50°C.
※After the curing process is complete, measure the moisture content of the wood to be actually applied (outside). It is not necessary to measure the moisture content of the wood to be applied (outside) after curing is complete. The higher the temperature, the higher the absorption rate into the wood. However, it can be used at room temperature.
– In the case of external installation, if there is severe dirt or moss, clean the wood part first.
・Wipe off any dirt or moss that adheres to the window frame booklet with warm water or a wet rag as soon as possible.
*If the wiping is insufficient, SOUFA may crystallize and remain white after drying.
-SOUFA should be used as it is in its original state.
-SOUFA may be precipitated due to a drop in temperature. In this case, please reheat the solution to 60℃ or more using a throw-in heater to re-dissolve it. In this case, there will be no change in composition.
・When applying SOUFA and then applying top coat, please allow several days for drying time. The evaporation rate of SOUFA is almost the same as water.
When judging the weather and temperature conditions on that day.
After drying, please follow the directions for use of the top coat when applying the top coat.
6) Rain Protection
– In case of new construction, etc., before the roof is applied, please cover the area with vinyl sheeting or blue sheeting
to prevent the rain from getting in.
Since sodium polyborate is an inorganic substance, it will not volatilize even if it is sealed, there is no immediate health hazard to the human body.
– Prepare a brush, roller and sprayer and apply the undiluted solution to the wood.
・100g to 150g/m2
※When using the wood preservative certification number of Japan Wood Preservative Association, 300g/m2
※The above is in accordance with the certification regulations
– SOUFA is effective against Myrmecological termites (e.g., Yamato termites and Formosan subterranean termites) and drywood termites (e.g., American Formosan termites and Formosan subterranean termites).
Sodium polyborate, the main component of SOUFA, is an inorganic substance that does not volatilize, so its ant-antight, ant-preservative, and fire retardant effects are semi-permanent.
– Under low temperatures (aqueous solution temperature of 5°C or lower), components may precipitate (white lumps may appear under the container).
In this case, please use a throw-in heater to re-dissolve the solution at a temperature of 60℃ or higher.
The re-melted SOUFA will not change in composition.
Aqueous solution absorption will vary depending on the type of wood and the outside temperature.
You may need to adjust to your local conditions.
On December 25, 2013, no toxicity was observed in the following studies: 1. 2, Acute dermal toxicity study in rats
3, Acute inhalation toxicity study in rats
4, Skin irritation study in rabbits
5, Eye irritation study in rabbits
6, Skin sensitization study in guinea pigs ( (Buehler test method)
7. Acute toxicity test using carp
8. Acute inhibition of swimming test using Daphnia magna
●Tests were conducted as follows:
1. ※1. 2. 2. 4. 5. 6.
■Preservative, Preservative and Iron Corrosion Test
Preservative performance test and termite resistance test
JIS K-1571(2010)Preservative Performance Standards and Test Methods for Wood Preservatives-Annex A Preservative performance test and termite resistance test for limited applications (surface treatment) JIS K-1571 (2010) “Performance criteria and test methods for wood preservatives”-5.4 “Iron corrosion test”-5.4.2 “Surface treatment”
●Testing was conducted as follows
*Kyoto University Research Institute for Sustainable Humanosphere, Kyoto University on October 9, 2012. (Laboratory of Habitat Environmental Symbiosis) Professor Takeshi Yoshimura
*February 21, 2013 Professor Shuji Itakura
, Laboratory of Forest Biology, Department of Applied Life Sciences, Kinki University
Japan Wood Preservation Association Excellent Wood Preservative
and Certification Number
SOUFA:A-5465 (Surface Treatment)