Sikkens Cetol BL Primer

Having stain-blocking properties, this is a medium build, water-borne primer
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Key benefits
  • Minimises extractive discolouration
  • Provides a sound base for subsequent coatings
  • Provides optimum adhesion and flexibility.
  • Quick Drying
  • Low odour.
Technical Information
  • Finish Matt
  • Coverage 10 m²/L
  • Drying Time 20 minutes
  • Recoatable 4-6 hours
  • Composition Water-based
Product Features
  • Excellent Adhesion

Product Description

Cetol BL Primer is a premium quality primer with excellent adhesion properties to timber.

Application Description

Conditions : Do not apply if there is a risk of rain, or when air/substrate temperatures are below 8ºC or above 25ºC
during application or drying periods. Protect from frost and rain until dry. Failure to meet these requirements may
adversely affect the drying, visual quality and durability of the finish.Ensure product is thoroughly stirred before and during application, otherwise sheen and colour variations may be experienced. Cetol BL Primer is supplied ready for use. Do not thin.For best results use a good quality synthetic-fibre brush specifically designed for the application of water-borne products.Apply product in a full flowing coat, laying off in the direction of the grain. Use the minimum number of brushstrokes
required for an acceptable finish. Avoid overbrushing, which creates brush marks, produces a poor quality finish and reduces the effectiveness of the coating as a blocking primer. Coating system durability can be improved by use of end grain sealers.After applying one coat, allow a minimum of 4 hours drying time if a second coat is required. On new work, where practical the first coat should be applied all round prior to fixing. Pay special attention to exposed end grain, tops and bottoms of
doors, and undersides of cills. Carefully denib the coat using a fine grade nylon abrasive pad or a fine grade (P240 or finer)
wet or dry silicon carbide abrasive paper. Remove all dust.Subsequent coatings should be applied as soon as possible after Cetol BL Primer has dried, but no sooner than 15 hours,in order to provide full protection and isolation of extractives. In any event this period should not extend beyond three months, otherwise additional preparation and coating may be necessary. If applied to exterior wood and the contract is of long duration, it is suggested that a further coat be applied prior to finishing to make good any weathering during the construction period

Technical & Safety Documentation

Tips & Advice

  • 1. Preparing the Surfaces
    Timber – Ensure the timber surface is suitably prepared, clean and dry, with dust, dirt, wax and grease removed, and
    allowed to acclimatise to its end-use environment. The moisture content should not exceed 18% prior to coating (14% for
    interior surfaces). Degrease any exposed bare timber surface by wiping with a cloth dampened with a suitable solvent. Certain timber species contain high levels of natural wood extractives or exudates and some softwood can be highly resinous. Resinous deposits should be removed with a scraper. Any remaining residues should be removed using a lint-free cloth dampened with methylated spirits, frequently changing the face of the cloth. Allow solvent to evaporate fully before overcoating. The use of both eye and hand protection is strongly advised.
    We do not recommend the use of “knotting agents”, particularly on exterior work, as they are not always fully effective in
    “sealing in” resin. In addition, the adhesion of coatings can be impaired. When filling, be sure to use fillers specifically designed for use with timber. General or all purpose fillers are not suitable, particularly on external areas, as they cannot cope
    with timber movement and work loose.New Timber : Where a superficial application of preservative to softwood and hardwood is deemed necessary, such as timbers in Durability Class 3 or lower, use Cuprinol Wood Preserver Clear (BP). For Class 4 (in ground contact) and 5 (marine) use pre-treated wood specific for these conditions. Preservative pre-treatments must be fully dry before the application of Cetol BL Primer. Do not use on substrates which have had water-repellent preservative pre-treatments applied. Where possible, the first coat should be applied all round prior to fixing.
    Only use non-ferrous screws, nails and fixings. Base stained/primed : Denib 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.Note :Where there is localised damage, or deterioration has occurred as a result of exposure of the factory coating for longer than 3 months, affected areas should be thoroughly sanded back to a sound substrate. All damaged or decayed timber must be removed and replaced, cutting at least 25mm into sound timber. When splicing in new sections consider whether the timber species’ natural durability is sufficient. Brush apply two coats of Cuprinol Wood
    Preserver Clear (BP) to saturation. Thoroughly treat timbers, especially end grain sections, and ensure they are fully dry before splicing in. Secure with non-ferrous fixings and fill all voids surrounding the spliced-in area with a suitable repair compound such as Dry-Flex from Repair Care .
  • 2. Cleaning
    Brushes should be cleaned immediately after use with warm, soapy water, and then rinsed thoroughly with clean water. If spilled Cetol BL Primer may be removed immediately while still wet using warm,soapy water
  • 3. Storing
    Store in cool, dry, frost-free conditions
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