Chengdu Guibao Science & Technology Co., Ltd.,

Two Part Structural Silicone Sealant / Neutral Cure Silicone Sealant

Product Details:
Place of Origin: CHINA
Brand Name: GUIBAO
Certification: ISO, SIRIM
Model Number: 992
Payment & Shipping Terms:
Minimum Order Quantity: 10 kits
Price: Negotiable
Packaging Details: Part A: 190L part B:19L
Delivery Time: 4 working days
Payment Terms: T/T
Supply Ability: 100 kits/4 working days
  • Detail Information
  • Product Description

Detail Information

Features: Two Parts , Neutral Cure Color: Black After Mixing
Application: Structural Bonding And Glazing Applications For Glass Curtain Walls, Aluminium Curtain Walls, Terracotta Curtain Walls And Metal Structures. Structural Secondary Seal Of Insulating Glass. Other Construction Structural Glazing Applications Shelf Life: 12 Months
Packing: Part A In 200L Drums (net 190L), Part B In 20L Pails (net 19L). Main Raw Material: Silicone
High Light:

acetoxy silicone sealant


two part silicone sealant

Product Description

Two Part Silicone Structural Glazing Sealant Construction Silicone Sealant


Two part silicone sealant specially designed for structural glazing.




Part A (base) of GB 992 is available in white, part B (curing agent) in black; Black colour after mixing.




GB 992 Silicone Structural Glazing Sealant is designed for:

Structural bonding and glazing applications for glass curtain walls, aluminium curtain walls, terracotta curtain walls and metal structures.

Structural secondary seal of insulating glass.

Other construction structural glazing 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 (ASTM D 2377) Tack free time h ≤3 0.8
GB/T 13477

Working time

(after 20 min.)

s ≤10 2.2

GB/T 531.1 (ISO 7619)


Hardness Shore A 20~60 43
GB 16776 (ASTM C 792) Heat Aging      
  weight loss % ≤10 3.5
  cracking   Nil Nil
  chalking   Nil Nil
GB/T 13477 (ISO 8339) Tensile strength



  23℃   ≥0.60 1.13
  90℃   ≥0.45 1.02
  -30℃   ≥0.45 1.3
  water immersion   ≥0.45 1.01
  water-UV exposure   ≥0.45 1.09
  adhesion failure % ≤5.00 0

Elongation at

ultimate tensile strength at 23℃

% ≥100 140

*GB: Chinese National Standard.

ASTM: American Society for Testing and Materials.

ISO: International Standardization Organization.




Two parts , neutral cure to form an extremely tough elastomeric rubber ensuring a durable, flexible, and watertight bond.

Non-corrosive to metals, coated glass, low-E glass and many other substrates.

Excellent weatherability and high resistance to UV radiation ,heat and humidity, and ozone.

Excellent stability through wide temperature range from –50 ℃ to +150 ℃.

High level of mechanical properties.

Good compatibility with other neutral silicone sealants.




GB 992 is available in kit: part A in 200L drums (net 190L), part B in 20L pails (net 19L).




GB 992 is designed to meet or even exceed the requirements of:

Chinese national specification GB16776-2005 Silicone Sealant for Structural Glazing.

Complies with ASTM C 1184.




It has a shelf life of 12 months from the date of manufacture.




GB 992 should not be applied:

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 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.


Mixing and Dispensing

To obtain the optimal performance of GB 992, it is recommended that base and curing agent thoroughly mixed using an airless two-part silicone dispensing machine.

GB 992 should be mixed at a ratio of 9:1~11:1 base to curing agent by volume or 11:1~13:1 base to curing agent by weight.

Lot matching of GB 992 base to curing agent is not required. Before use, it is recommended that curing agent be fully stirred to ensure the homogeneity of all components.

GB992 part B curing agent will react with atmospheric moisture, therefore should not be exposed to air for prolonged periods of time.



Priming is not usually required when using GB 992. But it is essential that adhesion is tested prior to use to decide whether to use primer or not.


Masking and Tooling

Areas adjacent to joint may be masked to ensure a neat sealant line. Do not allow mask tape to touch clean surfaces to which the silicone sealant is to adhere. Tooling should be completed in one continuous stroke after sealant application. Masking tape should be removed immediately after tooling.


Equipment Cleaning

When not being used, it is recommended that the dispensing equipment be purged either with the base component or flush with suitable solvent.




GB 992 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 needed for work and 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.



Get in touch with us

Enter Your Message