AG-838 Neutral Silicon Weatherproofing Sealant

AG-838 Silicone Weatherproofing Sealant Description AG-838 Silicone Weatherproofing sealant is a one-part, neutral-cure, architectural grade sealant specifically designed for general glazing and weather sealing in curtain wall and building facade. It can be easily extruded in a wide rang of weather condition and quickly cures at room temperature by reaction with moisture in the air to form a excellent , durable, flexible silicone rubber seal. Characteristic a. Can be easily used and extruded any time. b. Neutral cure-suitable for use on most construction materials. c. Excellent adhesion to most construction materials without the primmer. d. Excellent weatherproof ability, virtually unaffected by sunlight, rain, snow, ozone or temperature extremes. e. Low modulus sealant. f. Extension/compression movement capability of up to ±50% of the original joint width. Where to use AG-838 is especially designed for general glazing and weather sealing in curtain wall and building facades. It is suitable for glazing weatherproofing movement joint and sealing the joints of the non-structural curtain wall. It can form a waterproofing sealed layer to many kinds of glasses, coated aluminum, decorative metal board, tile, and granite without primmer. Use limitations AG-838 silicone Weatherproofing sealant is not fit for structural usage. It should NOT be applied in the following conditions: a. To building materials that bleed oils, plasticizers or solvents and green or partially sulfur zed gaskets or tapes, etc. b. In totally confined spaces (Silicon sealant need the water in the air to cure) c. For continuous immersion into water or below-grade applications all the year d. To painted surfaces, may cause seal failure as the paint cracking or paint stripping e. To frost-laden or wet surfaces f. Surface touch the food directly g. Easily suffer mechanical wear h. Fireproofing seal system Technical Data (for reference) The following data is for reference, is not suggested to make standard. No Item The standard Test result Test method Test at 50±5% RH and temperature 23±2°C 1 Appearance Have no grain, no agglomerations,1 Pass the the standard 2 Droop degree mm Uprightness ≤3 0 GB/T113477.6-2002 Level No distortion No distortion 3 Tack Free Time, h ≤3 0.8 GB/T113477.5-2002 4 Extrusion ability, ml/min ≥80 137 5 Tensile modulus Mpa 23°C > 0.4 or > 0.6 0.5 -20°C 6 Curing time at 50±5% RH and temperature 23±2°C,days 7-14 7-14 As Cured –After 21days at 50±5% RH and temperature 23±2°C: 7 Durometer Hardness,(Shore A), points 28 GB/T1531-1999 8 Tensile strength at 25% elongation, Mpa 0.2 GB/T113477.8-2002 9 Tensile strength at 25% elongation, Mpa 0.35 GB/T113477.8-2002 10 Tensile at 100% Elongation no break GB/T113477.8-2002 11 Ultimate elongation % at break,% 350-400 GB/T113477.8-2002 12 Sealant Class 25LM ISO 11600 or JC/T881-884-2001 GB/T1___Chinese national standard Material feature AG838 Silicone Weatherproof sealant can keep good viscous degree and can be easily extruded at -25°C to 50°C; Can keep good flexibility at -50°C to 150°C after cured. It is unaffected by UV ray, rain, ice, snow, air pollution, ozone and high or low temperature. Even under the severe weather conditions, it can maintain excellent weatherproofing and waterproofing properties for some years, AG838 has an excellent compatibility with reflect glass, doubling glass, silicone hollow glass, acrylic acid, polythene and etc. Specifications JC/T881-884-2001 25LM; GB/T 14683-2003 25LM; ISO11600F&G class 25LM; ASTMC 920NS model 25 grade; BS5889 A&B model; DIN 18545 NFgrade. Colors AG838 silicone weatherproof sealant is available 4 standard colors: white, black, grey, brown. We can also supply the other color according to the customer’s requirement. Packing It is available in 300ml plastic cartridges, 24 cartridges/ carton. or 500ml aluminum sausages,20 sausages /carton. Storage and usable life It has a useable life of 12 months from the produced date when stored under dry and airy,27°C or lower temperature conditions in the original unopened container. Handling Precautions 1. Sealant should not be contacted with food or cosmetics; 2. Do not contact skin for a long time with uncured sealant; 3. Rinse eyes with large quantities of water and seek medical check if sealant drops into eyes. 4. Sealant should be kept beyond children’s reach