Osmo Recommends Advisory: For optimal results, please apply Osmo products to all hidden wooden surfaces prior to installation and weathering.
The following steps are recommended to achieve optimal results for your wood project, specifically cladding, decking, and other similar projects which when installed have non-visible, hidden wooden surfaces that also require protection. These steps will also help provide higher protection from residual moisture.
1. Preparation
Prior to installation and the weathering period, Osmo recommends to wipe all wooden surfaces which will not be visible after installation with either methylated spirits or Osmo Brush Cleaner and Thinner. Allow the cleaned surface to fully dry prior to treatment.
Please leave the wooden surfaces which will remain visible after installation untouched and ready for the weathering period.
Why? Cleaning with methylated spirits or Osmo Brush Cleaner and Thinner is needed to help de-grease some types of wood species, and facilitating the absorption of the Osmo product.
2. Product Application
Once the hidden surfaces have been wiped/prepped and allowed to fully dry. Depending on wood species, apply WR Base Coat 4001 to all hidden parts (e.g. back, sides and ends). Once fully dry, apply one thin coat of the chosen finish to the hidden parts and allow to dry. Finally, treat the end grain sections with two thin coats of Osmo End Grain Sealing Wax 5735 for added protection.
For this process, one coat of each product will be sufficient. However, for best results, WR Base Coat and End Grain Sealing Wax can be applied twice.
3. Installation
Once the final Osmo product is dry, you may complete the installation of your project leaving the untouched, visible wooden surface exposed for weathering.
4. Weathering and Application
Now that your project has been fully installed, please follow Osmo Recommends from Step 1: weathering onwards.
Weathering will improve the absorbency of the wood ready for treatment with Osmo.
After the weathering period, Osmo recommends using Wood Reviver Power Gel to help clean and de-grey weathered wood. Please protect sensitive surfaces (e.g. Stone and Aluminium) whilst cleaning. Once all surfaces are rinsed and dry, apply the recommended Osmo products for optimal protection followed by the recommended Osmo finishing products.
Note: If you require ‘a finish that allows the wood to naturally grey over time’ Wood Reviver Power Gel will not be required.
Expert Advice
The information above relates highly to wood cladding and decking projects, however you may have a project with similar hidden surfaces that you need consultation on.
For expert advice on any project, pre- and post-installation, please contact the contact the Osmo Advice team today.
We’re always here to help!