Chengdu Guibao Science & Technology Co., Ltd.,

Black Waterproof Silicone Sealant For Skylight Weatherproofing 300ml

Product Details:
Place of Origin: CHINA
Brand Name: GUIBAO
Certification: ISO, SIRIM
Model Number: 993
Payment & Shipping Terms:
Minimum Order Quantity: 2000 pcs
Price: Negotiable
Packaging Details: Cartridges (net 300ml),24 pieces to a carton.
Delivery Time: 4 working days
Payment Terms: T/T
Supply Ability: 20000 pcs/4 working days
  • Detail Information
  • Product Description

Detail Information

Usage: Construction Color: Black,transparent
Shelf Life: 12 Months Volume: 300ml
Packing: 300ml Package: In Cartons
Application: 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 Safety Requiremen Feartures: One Part, Neutral Room Temperature Cure
High Light:

exterior silicone sealant


water resistant silicone sealant

Product Description

Silicone Sealant for Skylight Silicone Weatherproofing Sealant


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

Test Method Property Unit Standard Result
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



  23℃   ≤0.4 0.36
  -20℃   ≤0.6 0.45
GB/T 13477 (ISO 37) Elongation at break % ≥300 426
GB/T 13477 Adhesion at fixed stretch  



No failure
GB/T 13477 Adhesion after heat contract and cold extension  



No failure
GB/T 13477 Adhesion after water immersion and UV exposure  



No failure

*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 safety requirement.




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.




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 for cure.

To frost laden or damp surfaces.

For continuous water immersion.

When surface temperature below 4℃ or over 50℃.




Surface Preparation

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.


Application Method

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 specific applications.


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