Osmo WR Base Coat

Osmo WR Base Coat

Osmo WR Base Coat Clear is a high-performance wood preservative specially formulated for exterior wood surfaces. This clear, solvent-free impregnation primer penetrates deep into the wood to provide advanced protection against rot, blue stain, and wood-destroying insects such as termites and woodworms.

It acts as an essential first coat for exterior wood that will later be finished with Osmo oils or paints, helping to ensure long-lasting durability. The formula also reduces wood swelling and shrinkage caused by environmental changes, improving dimensional stability.

Ideal for use on wooden windows, doors, pergolas, cladding, fencing, and other outdoor wood structures, Osmo WR Base Coat enhances wood’s resistance to moisture and biological threats while preserving its natural appearance.

Key Features:

• Clear wood impregnation for exterior use only
• Protects against rot, blue stain, and wood-destroying insects
• Reduces swelling and shrinkage of wood
• Serves as a primer before finishing with Osmo wood oils or finishes
• Deeply penetrates wood for long-lasting protection
• Suitable for all exterior softwoods and hardwoods
• Microporous and breathable – allows wood to breathe
• Easy to apply with a brush; quick-drying
• Product Specifications:
• Type: Clear wood primer (not a surface finish)
• Recommended Use: Exterior wood (e.g., windows, doors, cladding)
• Application Method: Brush
• Coverage: Approx. 5–6 m² per litre (depending on wood type and condition)
• Dry Time: 12 hours (under normal conditions)
• Boxed Weight: 830 g

• Frequently Asked Questions (FAQ)
• Q1: Is Osmo WR Base Coat a finish?
  No, it is a primer/impregnation coat. It must be followed with a top coat such as Osmo Natural Oil Woodstain or Osmo UV-Protection-Oil.
• Q2: Can I use this product indoors?
  No, this product is intended for exterior use only due to its preservative properties.
• Q3: Does it change the color of the wood?
  It is a clear primer, but it may slightly darken the wood depending on the species and porosity.
• Q4: Is sanding required before application?
  Wood should be clean, dry, and frost-free. Sanding may be required for weathered or rough surfaces to allow proper absorption.
• Q5: How many coats are needed?
  One coat is sufficient. Do not apply multiple coats or allow the product to form a film on the surface.
• Q6: Is this product safe for pets or gardens?
  It should be used carefully and kept away from plants and animals until fully dry. Always follow safety instructions on the label.

Warranty Information

Satisfaction Guarantee:
Osmo offers a 30-day satisfaction guarantee. If you are not fully satisfied, you may return the unused product within 30 days of purchase for a refund or exchange with proof of purchase.

Damaged or Defective Items:
If your product arrives damaged or is found to be defective, please contact customer service within 7 days to arrange a replacement or refund