Construction Silicone Sealant for Skylight Silicone Weatherproofing
High performance neutral cure silicone with superior elasticity,
movement accommodation and weatherability, ideally suited for
skylight joint seal applications.
These values are not intended for use in preparing specifications
|GB/T 13477 (ISO 7390)||Slump||mm||≤3||0|
|GB/T 13477 (ISO 8394)||Extrusion rate||ml/min.||≥80||232|
|GB/T 13477 (ASTM D2377)||Tack free time||h||≤3||2.0|
|GB/T 13477 (ISO 7389)||Extension recovery||%||≥70||93|
|GB/T 13477 (ISO 8339)||Tensile strength|
|GB/T 13477 (ISO 37)||Elongation at break||%||≥300||426|
|GB/T 13477||Adhesion at fixed stretch|
|GB/T 13477||Adhesion after heat contract and cold extension|
|GB/T 13477||Adhesion after water immersion and UV exposure|
*GB: Chinese National Standard
ASTM: American Society for Testing and Materials
ISO: International Standardization Organization
One part, neutral room temperature cure.
Superior elasticity, low modulus, remain stable and flexible from
–50 ℃ to +150 ℃.
Outstanding weatherability and resistance to UV, snow, rain, ozone,
water and etc.
Excellent unprimed adhesion to most building materials.
Non staining or corrosive to most building materials.
Fast cure rate, easy to use.
GB 993 is available in black and translucent.
GB 993 is available in disposable cartridges (net 300ml),24 pieces
to a carton.
GB 993 Silicone Sealant for Skylight is a high performance silicone
sealant specially designed for:
Glazing , watertight joint seal in skylight engineering.
Glazing and watertight seal for the ceilings over the waiting halls
at airports, railway stations and bus stations.
Sealing other construction joints with greatly high movement or
GB 993 is designed to meet or even exceed the requirement of:
China national specification.
GB/T 22083-2008 class50.
Complies with ASTM C 920.
STORAGE AND SHELF LIFE
GB 993 should be stored in original unopened containers. It has a
shelf life of 12 months from the date of manufacture.
GB 993 should not be applied:
For structural glazing.
To the materials that bleed oils , plasticizers or solvents, such
as impregnated wood.
In totally confined spaces as sealant requires atmospheric moisture
To frost laden or damp surfaces.
For continuous water immersion.
When surface temperature below 4℃ or over 50℃.
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 993 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.
GB 993 is a chemical product, not edible, no implantation into body
and should be kept away from children.
Cured silicone rubber can be handled without any risk to health.
Should uncured silicone sealant contact with eyes, rinse thoroughly
with water and seek medical treatment if irritation persists.
Avoid prolonged exposure of skin to uncured silicone sealant.
Good ventilation is necessary for work &cure places.
Complete technical information and literature, adhesion testing and
compatibility testing are available from Guibao.
The information presented herein is offered in good faith and is
believed to be accurate. However, because conditions and methods of
using our products are beyond our control, this information should
not be used in substitution for customer’s tests to ensure that our
products are safe, effective, and fully satisfactory for intended