1. special for curtain wall
2. excellent unprimed adhesion to glass and metal substrates
3. Perfect weatherproof ability
JOINLEADER 998 Double Component Silicone Structural Sealant
JOINLEADER 998 Two Part Structural Silicone Sealant is a two-component, high quality, neutral and room-temperature cured Silicone Structural Sealant.
JOINLEADER 998 Two Part Structural Silicone Sealant is especially for structural glass assembly with excellent unprimed adhesion to most common building materials.
High ultimate tensile strength sealant ideally suited for structural bonding and protective glazing applications
Odorless, neutral and non-corrosive cure at room temperature.
Excellent resistance to weather, over 50 years’ duration under normal climatic conditions
Excellent resistance to low and high temperature, performance changes little between -50°C~200°C
Excellent mechanical properties
Very good adhesion and compatibility, especially to metals (non-corrosive) and various paint systems.
Be compatible to most membrane-plated glass or hollow glass.
Successfully tested for use in protective glazing applications
Excellent unprimed adhesion to wide range of substrates.
Meets global standards for structural glazing (American, China, Europe)
Bases as supplied:
Aspect: Viscous white Paste
Gravity, g/ cm3: 1.3~1.4
Viscosity, mPa.s 130,000~170,000
Curing agent as supplied:
Aspect: Viscous black Paste
Gravity, g/ cm3: 1.0~1.1
Viscosity, mPa.s 12,000~17,000
Color and Consistency Black, non-slump paste
Gravity, g/ cm3 1.3~1.4
Viscosity, mPa.s 35,000~45,000
Working Time ,Min 10 to 30 (23°C/75°F, 50% RH)
Tack-Free Time ,Min 80 to 100 (23°C/75°F, 50% RH)
AFTER CURED: 23°C±2°C, RH50%±5% 14 days
SERVICE TEMPERATURE: -50°C to +250°C
Tack-free time, h
Mass loss by heat, %
Joint Movement Capability,%
Tear Strength, kN/m
Peel Strength ,ppi
Tensile at 25% Elongation,MPa
Tensile at 50% Elongation,MPa
Elongation at break,%
JOINLEADER 998 2-Component Structural Silicone Sealant can be used for structural glazing and sealing for glass, stone, aluminum panel curtain wall.
For silicone structural glazing and protective glazing applications.
It can also be used for secondary seal of insulating glass, filling and sealing for complex edge.
Part A and B of JOINLEADER 868 each have a shelf life of at least 12 months. If stored in tightly closed original containers in a dry place at temperatures not exceeding 27°C, the “best used before end” date of each lot is shown on the product label. If the material is kept beyond the recommended shelf life, it is not necessarily unusable, but a quality control should be performed on the properties relevant to the application.
Maintenance is not necessary. If the seam of sealant is damaged, remove it with solvent. After removing the piled scale, JOINLEADER 998 2-Component Structural Silicone Sealant will conglutinate with solidified silicone sealant.
The complete technical data and presswork can be procured from JOINLEADER and its authorized agent. JOINLEADER provides adhesive and compatible test.
Part A (Base): White, grey
Part B (Curing Agent): Black
Part A: 180L/185L
Part B: 18L/18.5L
Part A: 18L
Part B: 300ml×6