|Place of Origin:||CHINA|
Payment & Shipping Terms:
|Minimum Order Quantity:||2000 pcs|
|Packaging Details:||Cartridges (net 300ml) ,24 pieces to a carton and sausages (net 590ml),20 pieces to a carton.|
|Delivery Time:||4 working days|
|Supply Ability:||20000 pcs/4 working days|
|Shelf Life:||12 Months||Appearance:||Smooth Paste Without Bubble Or Particles,uniform Paste|
|Quality:||High||Feature:||Excellent Weatherproof Sealing|
|Name:||Silicone Weatherproof Sealant|
998 Construction Silicone Sealant,
GB/T 13477 Construction Silicone Sealant,
GB/T 13477 silicone weatherproofing sealant
Weatherproofing Construction Silicone Sealant
One part, neutral cure silicone sealant with excellent weatherability, ideally suited for movement joints seal.
These values are not intended for preparing specifications.
|GB/T 13477 (ISO 7390)||Slump||mm||
|GB/T 13477 (ISO 8394)||Extrusion rate||ml/min||≥80||
|GB/T 13477(ASTM D 2377)||Tack free time||h||≤3||1.1|
|GB/T 13477 (ISO 7389)||Extension recovery||%||≥80||90|
|GB 16776 (ISO 10563)||Weight loss||%||≤10||5.6|
|GB/T 13477 (ISO 8339)||Modulus at 23℃||
|GB/T 13477 (ISO 11600)||Movement capability||%||±35||±35|
|GB/T 13477||Adhesion at fixed stretch||No failure||No failure|
|GB/T 13477||Adhesion after heat contract and cold extension||No failure||No failure|
|GB/T 13477||Adhesion after UV-water exposure||No failure||No failure|
*GB: Chinese National Standard
ASTM: American Society for Testing and Materials
ISO: International Standardization Organization
Excellent weatherability, virtually unaffected by sunlight, rain, snow and ozone.
Neutral cure – suitable for use on metals, coated glass, aluminum panels, terracotta panels, concrete materials, galvanized steel and many other substrates.
Extension/compression movement capability of up to ±35 percent of the original joint width.
Excellent resistance to temperature extremes, stable and flexible over the temperature range from –50 ℃ to +150 ℃.
Excellent unprimed adhesion to a wide variety of building materials.
Easy of application-ready to use as supplied.
Good compatibility with other neutral silicone sealants.
GB 998 Silicone Weatherproofing Sealant is designed for:
General weather sealing and glazing in glass curtain walls, aluminum curtain walls and terracotta curtain walls.
Sealing the joints of concretes, plastics, metals and etc.
GB 998 is available in black, gray, white and other customized colours.
GB 998 is designed to meet or even exceed the requirements of:
Chinese specification GB/T 22083-2008 35HM.
Complies with ASTM C 920.
GB 998 is available in disposable cartridges (net 300ml) ,24 pieces to a carton and sausages (net 590ml),20 pieces to a carton.
As exposed to air, GB 998 begins to cure inward from surface. Its tack free time is about 70 minutes, the full and optimal adhesion forms in about 21 days.
It has a shelf life of 12 months from the date of manufacture.
GB 998 should not be applied:
As structural sealant.
To the materials that bleed oils , plasticizers or solvents, such as impregnated wood, oil-based caulks.
In totally confined spaces as sealant requires atmospheric moisture for cure.
To frost laden or damp surfaces.
For continuous water immersion.
When substrate surface temperature below 4℃ or over 50℃.
To copper, zinc or lead coated surfaces.
HOW TO USE
Clean all joints removing all foreign matter and contaminants such as oil, grease, dust, water, frost, old sealants, surface dirt, or glazing compounds and protective coatings.
Install back-up materials or joint fillers, setting blocks, spacer shims, and tapes. Mask areas adjacent to joints to ensure neat sealant lines. Primer is generally not required for non-porous surfaces, but may be necessary for optimal seal performance of certain porous surfaces. So adhesion test is always recommended.
Apply GB 998 in a continuous operation using dispensing guns. Before a skin forms, tool the sealant with light pressure to spread the sealant against the backing materials and joint surfaces. Remove masking tape as soon as the bead is tooled.
Complete technical information and literature, adhesion testing and compatibility testing are available from Guibao.