Sikkens Cetol Filter 7 Plus - Durable Exterior Wood Stain
The Sikkens Cetol Filter 7 Plus is a durable exterior wood stain for exterior wood and timber surfaces. This is a solvent based coating, that creates a translucent, satin wood stain finish. The highly translucent coating, will bring out the natural beauty of the wood grain.
Use Cetol Filter 7 Plus for protecting exterior timber from UV, weathering and moisture. With added microporous, water-repellent and flexible properties, the Filter 7 plus will help protect exterior timber and regulate moisture. Furthermore, the excellent UV protection makes this product great for exposed south-facing exterior timber surfaces.
Perfect for use as a top-coat for translucent systems on soft and hardwood constructions. Also suitable for coating windows and doors joinery.
This solvent based product creates a satin finish and is easy to apply by brush with the 3-coat system.
Expected maintenance cycle: Re-coat every 5 years
Properties of the Sikkens Cetol Filter 7:
- Translucent wood stain that shows the wood grain
- Satin Finish
- Solvent Based Coating
- Highly durable, 5 year re-coat time
- Excellent resistance to UV radiation.
- Great for use on timbers exposed to high levels of UV (south-facing)
- Good weather resistance
- Flexible, Micro-porous and Water-Repellent
- Easy to Apply by Brush
- Available in three semi-transparent colour ranges: Sikkens Standard, Classic Collection and Style Collection
Before proceeding with your coating system, ensure that the moisture content of the timber does not exceed 18%.
Ensure the timber surface is abraded, clean,and dry and is free from dust, dirt, wax and grease. Ensure to remove any existing surface mould and/or algae using a fungicidal solution.
Any resinous residues may be removed using a suitable solvent or methylated spirit. Knotting solution may be used to reduce extractive discolouration, however, knotting solutions are not always effective in 'sealing in' the resin.
Application of Sikkens Cetol Filter 7 onto New Woodwork or Timber
If applying to new woodwork, first take note of the timber species upon which you plan to apply:
For hardwoods - Apply a primer coat of Filter 7 Plus
Following application of the primer coat, follow with 2 finishing coats of the Cetol Filter 7 Plus.
Allow for 16 hours between coats. For best results, keep the interval between applications of the coats as short as possible.
Where possible, the first coat should be applied to all parts of the component prior to fixing. Apply in a well ventilated area.
Note: Discoloration of paint especially noticeable within light colours may occur over knots and resinous areas present in the wood. Particular attention with regards to preparation should be given to wood such as Oak, Teak, Cedar, Douglas Fir, Mahogany and Idigbo, etc., which contain oil and water-soluble tannin which may impair the drying, hardening or adhesion of surface coatings and discolour the finished surface.
Maintenance of Sikkens Cetol Filter 7 Plus
For best results, it is recommended that the Sikkens Filter 7 Plus is reapplied every 5 years.
When looking to maintain the coating, take note of the current condition of the finish. Then clean, degrease and sand to create a key. If excessive weathering has occurred leaving a grey appearance, the surface must be abraded back to clean bare timber before re-coating.
Repair any defects in the timber. If any colour defects have occurred, apply a primer coat of Cetol HLS or Cetol Filter 7 in the colour you first chose. Allow to dry, and follow with one further coat of lighter Cetol Filter 7 Plus.
As with any semi-transparent colour, coating or stain, the more coats you apply the darker the shade becomes. Therefore it is recommended that in order to maintain the translucent appearance of the Cetol Filter 7 Plus over a longer period, to use light colours 077 or 006 for maintenance applications.
For maintenance applications, the same drying times and application instructions are applicable.
Damaged and Decayed Timber
All damaged or decayed timber must be removed and replaced before any coatings application. If looking to remove damaged/decayed timber, cut at least 25mm into sound timber. When splicing in new sections of wood, consider whether the timber species' natural durability is sufficient.
Ensure to thoroughly treat timbers, especially in any end grain sections and ensure all materials are fully dry before splicing in. Secure with non-ferrous fixings and fill any surrounding voids with a good quality wood filler.
Previously Coated Surfaces
De-nib using a fine grade nylon abrasive pad or a fine grade (P240 or finer) wet or dry silicon carbide abrasive paper, in the direction of the grain. Do not break through the surface coating. Remove all dust.
Where there is localised damage, or deterioration of the existing coating has occurred, the area should be thoroughly sanded back to a sound substrate and proceed with applying the three coats as with any new timber.
Joinery should be glazed with a suitable sealant in accordance with section 4.2 of the Glass and Glazing Federation manual together with BS 8000-7 : 1990 Workmanship on Building Sites and BS 6262 : 1982.
Linseed oil putty, type II butyl mastics and metal casement putty are not recommended for use.
When choosing a semi-transparent wood stain shade for exterior timber, lighter colours of translucent products are always less durable due to the impact of UV damage.
We never recommend a 'clear' version of this product, as this will not offer adequate protection of exterior timber.
The final colour of a semi-transparent stain will always depend on the colour of the timber underneath, and the amount of coats applied. The more coats applied the darker and more solid the colour. For best results, always do a test patch before applying to the whole area.
For more information please refer to the product data sheet.
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We are able to supply our primers and topcoats in a vast array of colours. In addition, we are able to provide very accurate equivalent matches to the paint ranges of the well recognized trade professional and retail designer colour collections. If this were not enough, we are also able to scan and provide close matches to materials such as plastic, glass, printed colour and textiles.