LT-898 Two-component Silicone Structural Glazing Sealant

LT-898 two-component silicone structural glazing sealant
1. two-component
2. neutral curing silicone sealant.
Description
LT-898 Two-component Silicone Structural Sealant is a two-component, neutral curing silicone formulation specifically developed for the structural bonding of glass, metal and other building components with good features as follows:
Characteristic
a. Approved by silicone SSG leading group of national committee of economic and trade
b. Meets National standards of GB-16776-2005
c. Excellent adhesion to a wide range of curtain-wall materials such as coated, enameled and reflective glass, anodized oxidation or coated aluminum and stainless steel.
d. High level of mechanical properties with joint movement capability of ±12.5%.
e. Neutral cured, no corrosion, non poisonous
f. Excellent stability in a wide range temperature at -50°C~+150°C
g. Excellent weatherproof feature and a high resistance to UV radiation, high temperature and humidity.
h. Lot matching of base and curing agent not necessary. Structural applications require prior testing and written print review by Lantian.
Where to use
It is designed for use in structural glazing applications such as: use for structural adhesion and seal the joints of the structural glass and metal in the factory or building site.
Curing
Neutral alkoxy curing with a little of ethanol to release
Properties
LT-898 Two-component Silicone Structural Sealant has excellent adhesion without priming to most construction substrates and its typical properties are suitable for wide temperature range. Product could meet GB 16776-2005, ASTM C 1184, ASTM C 920 12.5 CLASS, ISO 11600 12.5E.
Technical Data(for reference)
Item
Base
Curing Agent
Mixed Base to Curing Agent by Volume
Test method
Colors
White
Black
Black, no flow paste

Specific gravity
1.36
1.03
1.33

Shelf life, month
12
12


Mixed at 12:1 Base to Curing Agent by weight (or 9:1 by volume)
Working Time((humidity 50±5%,temperature 23±2°C)
minutes
20-60

Tack free time (humidity 50±5%,temperature 23±2°C)
minutes
80-100

Corrosive


no

As Cured 7 Days at (humidity 50±5%,temperature 23±2°C)
Ultimate tensile strength
MPa
0.95
GB/T
1
13477.8-2002
Ultimate elongation

%
120-130
GB/T
1
13477.8-2002
Hardness (Shore A)


40
GB/T
1
531
Tensile modules at 12.5% elongation
MPa
0.14
GB/T
1
13477.8-2002

Standard
GB/T
1___
Chinese national standard
Application
LT-898 Two-component Silicone Structural Sealant has excellent unprimed adhesion to most coated or not coated glass and metal spacers. It's compatible to most building materials. The thing should be careful is to prepare samples to do adhesion and compatibility tests before application.
Handling Precautions
Product safety information is not included in this document. Before handling, read product and material safety data sheets and container labels for safety.
Storage and Shelf Life
It is stored on airtight container under 30°C and 12 months of shelf life from the date of production.
Packing
LT-898 Two-component Silicone Structural Sealant base and curing agents are available in separate packaging or match packaging (12:1 by weight). The base will be used for purge in dispenser shutdown. So base is available in 245 Kg ferrous drum. Curing agent is available in 19 Kg plastic pail.
USE LIMITATIONS
LT-898 Two-component Silicone Structural Sealant could not be used for structural curtain wall glazing before written certification of Lantian technical service department.
a. Joint size and design audit;
b. Adhesion and compatibility tests among materials;
c. Observe special structural application and working quality standard.
d. Lantian will not burden the responsibility for application claims caused if no certification of Lantian technical service.
e. Lantian will issue quality insurance certificate to audited project. Users should follow local construction rules.
f. LT-898 Two-component Silicone Structural Sealant should not be contacted with any acetic sealant. Not recommend for drug use before tests.