BS EN 15651-2:2017 pdf download.Sealants for non-structural use in joints in buildings and pedestrian walkways Part 2: Sealants for glazing.
4 Requirements 4.1 Identification requirements and test methods 4.1.1 Short description of the sealant The short description of the non-structural sealant for glazing elements shall include: brand name, type (general chemical family), opaque or translucent, waterborne or solvent based or solvent free, reactive or non-reactive, and one or multi-component (e.g. neutral cure, reactive silicone and one component, etc.). The primer shall be stated for the substrate concerned if relevant (name, chemical type, etc.). 4.1.2 Thermogravimetric test The test shall be carried out in accordance with EN ISO 11358 on the uncured or wet sealant, between 35 °C to 900 °C, temperature slope 10 °C/min, non-oxidative condition (e.g. nitrogen). A single sample shall be used for this test. A single specimen may be tested and there shall be no significant difference between the reference curve and derivative (profile). In the case of multi-component sealant, each component shall be evaluated (if relevant).
4.1.3 Density 4.1.3.1 Principal A pyknometer is filled with the product under test. The density is calculated from the mass of the product in the pyknometer and the known volume of the pyknometer. 4.1.3.2 Method A test temperature of (23,0 ± 0,5) °C shall be used and the test sample and pyknometer shall be conditioned to this temperature, and it shall be ensured that the temperature variation does not exceed 0,5 °C during testing. The determination of the density shall be in accordance with EN ISO 2811-1:2016 and should be carried out using a suitable 50 cm 3 calibrated pyknometer as described in EN ISO 2811-1:2016, 6.1.1. An alternative is the 50 cm 3 Hubbard pyknometer as described in ISO 3507. Measurements should be carried out on the uncured or wet sealant and in the case of a multi- component sealant, each component shall be evaluated. At least three samples shall be tested. The specific pyknometer used and the mean value, recorded to two decimal places, shall be declared. The tolerance of the declared values shall be within ± 5 %.
4.1.4 Hardness (indentation) test (Shore Hardness) The determination of the indentation hardness shall be in accordance with EN ISO 868. The test shall be performed on the cured or dried sealant. The exact conditions of test shall be defined by the manufacturer, i.e. thickness, cure/drying times and temperature and relative humidity, specific hore type (A, D…), test time, temperature, etc. At least three samples shall be tested and the five measurements taken per sample. The mean value and tolerances of all measurements, recorded to the nearest unit, shall be declared.BS EN 15651-2 pdf download.