Cetol BL Primer is a premium quality primer with excellent adhesion properties to timber.
Having stain-blocking properties, this is a medium build, water-borne primer.
General No. of Coats
New/bare timber - 1 coat prior to Cetol BL Opaque
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
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