10 Best Water Based Wood Sealer for 2025

Roxil

• Waterproofs wood & maintains appearance
• Reduced organic growth - reduces mould & algae growth
• Protects wood from warping and improves dimensional stability
• Long lifetime (10+ years on softwood) - Non Biocidal - Ready for use
• Please be advised that due to Covid-19 related supply issues Container Format or Colour may vary slightly. This does not impact the performance of the product in any way.

CUPRNOL

• Actively prevents rot and decay
• Colourless Preserver for both interior and exterior use
• For use as a basecoat before painting, staining or varnishing
• Up to 5m2 per litre with 2 coats
• Drying time: 1-5 days depending upon the nature of the surface and the weather conditions

RONSEAL

• Ronseal Interior Varnish Matt Clear 750ml
• It delivers superior protection against heat, scratches and water
• Quick drying, touch dry in 20 minutes

SIKA

• Specifically designed to deeply penetrate all wood and joinery to give long-lasting protection from damage caused by wet rot, dry rot, decay and fungi
• Fungicides and algaecides present in this formulation are finely dispersed so that wood penetration and hence effectiveness is much Idealer than standard wood preservation products
• The use of ultra-lightfast pigments on the coloured variants give an even, fade-resistant finish which will last for years. Solvent free, low odour solution based on Micro-fine active technology
• Fast-drying and non-flammable; and application to wet timbers is possible without loss of performance
• Available in multiple sizes and colours including Clear, Dark Oak, Red Cedar, Fir Green and Golden Chestnut
• Wood Preserver
• Size: 5LTR
• Brand: Everbuild

Ronseal

• Colours and preserves rough sawn or smooth planed exterior wood
• Prevents rot and decay
• Kills woodworm and protects against re-infestation
• Highly penetrative, solvent based

Sika

• Kills all wood boring insects, their eggs and larva
• Penetrates deep into the wood for lasting protection
• Treats wet rot and dry rot
• Available as a 1 Litre, 2.5 Litre and 5 Litre
• Triple Action Wood Treatment
• Size: 1LTR
• Brand: Everbuild

Sika

• Kills all wood boring insects, their eggs and larva
• Penetrates deep into the wood for lasting protection
• Treats wet rot and dry rot
• Available as a 1 Litre, 2.5 Litre and 5 Litre
• Triple Action Wood Treatment
• Size: 5LTR
• Brand: Everbuild

SAFEGUARD

• BRICK, WOOD, CONCRETE & STONE Waterproofing
• Rapid Curing, Breathable, Colourless Water Seal
• Long-Lasting up to 10 Years Protection
• High Strength Formulation - 5% Active Ingredient
• Even Penetration - No Wet Spots; Bridges hairline cracks

Sika

• Specifically designed to deeply penetrate all wood and joinery to give long-lasting protection from damage caused by wet rot, dry rot, decay and fungi
• Fungicides and algaecides present in this formulation are finely dispersed so that wood penetration and hence effectiveness is much Idealer than standard wood preservation products
• The use of ultra-lightfast pigments on the coloured variants give an even, fade-resistant finish which will last for years. Solvent free, low odour solution based on Micro-fine active technology
• Fast-drying and non-flammable; and application to wet timbers is possible without loss of performance
• Available in multiple sizes and colours including Clear, Dark Oak, Red Cedar, Fir Green and Golden Chestnut
• Wood Preserver
• Size: 1LTR
• Brand: Everbuild

Roxil

• ✅ Weatherproofs wood for 10+ years
• ✅ Effective on softwoods and weathered hardwoods
• ✅ One coat application by brush or roller
• ✅ Reduces mould and algae growth
• ✅ Reduces warping