The power of CUTEK Extreme on the water intake of timber

The power of CUTEK Extreme on the water intake of timber

The CUTEK lab is always researching, developing, innovating and testing to ensure that CUTEK fulfils the mandate of providing the very best woodcare. The latest test conducted in the CUTEK lab shows the impact CUTEK timber oils has on minimising the water uptake in timber.

Why water intake matters:

Water is the enemy of wood. In damp and rainy conditions moisture ingresses into the timber causing swelling. When the timber dries, it shrinks. Over time, repeated we-to-dry cycles causes timber to crack, split, warp and rot.

One of the core features of CUTEK oil is that it deeply penetrates into timber, repelling liquid and gas phase moisture, to protect the timber from the inside out. However, not all timber is the same. Different species offer different cell structures, extractives and densities which change the timbers hygroscopic nature. In short, the water intake of timber differs depending on the species.

To see the effect CUTEK oil has on the water intake of different species of timber the CUTEK Lab decided to test the effects of CUTEK on 12 different species of timber.

The test:

We applied two coats of CUTEK Extreme on 12 different wood species two weeks apart and left to sit indoors for two months. We then submerged these 12 coated wood cuts under water for four days. Simultaneously, we submerged the same species wood cuts, except this time, not coated with CUTEK Extreme.

After four days, the wood cuts were removed and surface water was wiped off with a towel. The cuts were then weighed on a balance to determine the difference in weight from the original uncoated piece of timber. The difference in weight will indicate the volume of water that has been absorbed by the timber.

The results


The results show that CUTEK Extreme makes a significant impact in reducing the water intake across all the different species of timber. Across the 12 tested species, coating in CUTEK Extreme reduced water intake by an average of 54%.

The greater the density of timber, the harder it is for water to penetrate. The inverse also applies. This is exemplified by the softwood Hoop Pine which weighed more than 80% after submersion. However, when CUTEK Extreme was applied, absorption was only 25%; a decrease of 55%. This water decrease was also the trend for the tested hardwood species. Water intake on the popular decking Merbau decreased by more than 55% when coated with CUTEK Extreme compared to timber that was uncoated.


Wood coated in CUTEK Extreme offers considerable protection against the negative affects of water penetration. Be sure to stay tuned for further developments and testing from our CUTEK Lab.