Maintenance: Installing pre oiled timber? It still needs to be coated

Many timber suppliers provide timber decking and components pre-oiled as the benefits in-store and on-site include:  

  • Protection on all six sides
  • Prevents water damage & absorption
  • Prevents warping and cupping
  • Reduces tannin bleed

Installing pre-oiled timber is often considered the best option for timber projects such as decking, fencing, screening and gates - but it could leave you questioning if pre-oiled timber still needs another topcoat to finish the job. Continue reading why we recommend a final coat and the best product to complete your project.

Topcoat preparation of pre-oiled exterior timber

If you don't know what pre-oil has been used on your pre-oiled exterior timber, follow the below preparation steps before top coating: 

Step 1: Ensure your new pre-oiled timber is clean and free from dust, dirt, debris, and mortar before coating.

Step 2: Treat the surface with Intergrain Tannin and Oil Remover, following the directions

Step 3: Clean with Intergrain UltraPrep Timber Cleaner, following the directions

Step 4: Allow the surface to dry thoroughly and perform a water absorption test


If your pre-oiled Timber has been coated with Intergrain Universal Oil, follow these steps before top coating: 

Light surface soiling:

Step 1: All timber should be clean and free from dust, dirt and debris

Step 2: A light wipe with clean water and damp cloth will be suitable

Heavy surface soiling:

Step 1: Clean the surface with Intergrain UltraPrep Timber Cleaner following instructions. Rinse and allow the surface to dry thoroughly before top-coating

Choosing topcoats for pre-oiled exterior timber

When choosing a topcoat, the preferred finish best determines the most suitable product. A transparent oil, such as Intergrain Universal Oil, is recommended to maintain or highlight the natural appearance of the timber. 

For longer-lasting protection, Intergrain lightly pigmented UltraDeck Timber Oil* is recommended. To transform the colour of the timber, a semi-transparent stain such as Intergrain UltraDeck Timber Stain* will impart a deeper colour whilst allowing the timber grain to show through.