Yes, you can, provided that the mineral oil finish is well weathered, and the timber is dry, hungry and due for a recoat. Check if water beads on the stained surface. If water beads, this means penetration is poor and you must thoroughly clean the timber with MASTERMAX PREPMAX Timber Clean & Prep to ensure penetration prior to application of one coat of ULTRAMAX One Coat Deck & Furniture Stain.

Gloss variation can occur due to variability in stain absorption into the timber. The gloss of the stain finish evens-out to a low sheen finish with weathering.

We incorporate high loadings of powerful UV absorbing transparent pigments, and dry film biocide that ensures you need only one coat to protect the timber from UV degradation and inhibit the growth of unsightly moss, mould, lichen and algae. Whilst on the surface this might appear to make our product more expensive than our competition, but, it is better value for money as less product needs to be used, and you save time and effort by only needing to apply one coat.

Yes, but dressed or very smooth timbers can be less absorbent than rough-sawn timber. For best results, lightly sand the surface before application to open the grain and promote penetration. You may also need to reapply sooner due to the reduced initial absorption.

Over-application can lead to a tacky surface, uneven sheen, or poor curing. If excess stain remains after 15–30 minutes, wipe it off with a clean, dry cloth. Always apply only as much as the timber can absorb—avoid pooling or layering the stain.

ULTRAMAX should only be applied when air and surface temperatures are between 5°C and 30°C. Cold or damp conditions will slow drying and curing times, which can affect the final finish. Avoid application if rain is forecast within 24 hours.

Yes. ULTRAMAX is ideal for vertical absorbent timber surfaces like fences and weatherboards. Just ensure proper preparation and apply evenly to avoid runs or drips. One coat is usually sufficient to provide long-lasting protection and colour enhancement.