Composition
One-part,neutral-cure
RTV silicone sealant
Applications
Weather sealing in glass curtainwall joints
Weather sealing in metal, enamel curtainwall joints
Sealing in expansion joints for concrete, plastic and metal etc
Sealing in roof joints
Many other uses
Specifications
BAIYUN ST 3521 Silicone Weather-Proofing Sealant meets or exceeds the requirements of the following specifications for one-part sealants.
ASTM Specifications:
C920; Type S, Grade NS, Class 35, Use NT, A, G, O
How To Use
Complete design and installation guidelines are contained in the BAIYUN Technical Manual when using this product.
Colors
BAIYUN ST 3521 Silicone Weather-Proofing Sealant is available in 8 colors:black, gray, white,dark gray,deep brown,rufous,bright yellow and khaki.Custom colors may be ordered to match virtually any substrate.
Packaging
BAIYUN ST 3521 Silicone Weather-Proofing Sealant is available in 10.1 fl. oz. (300 ml) plastic caulking cartridges，16.9 fl. oz. (500 ml) foil sausage packs.
Limitations
BAIYUN ST 3521 Silicone Weather-Proofing Sealant should not be used, applied or is not recommended:
In structural glazing applications or where the sealant is intended as an adhesive.
In areas where abrasion and physical abuse are encountered.
In totally confined spaces as the sealant requires atmospheric moisture for cure.
On frost-laden or damp surfaces
To building materials that bleed oils, plasticizers or solvents – materials such as impregnated wood, oil-based caulks, green or partially vulcanized rubber gaskets or tapes.
In below-grade applications
On substrates made of polypropylene, polyethylene, polycarbonate and polytetrafluoroethylene.
Where movement capability greater than ±35% is required.
Where painting of the sealant is required, as the paint film may crack and peel
For structural adhesion on bare metals or surfaces subject to corrosion (i.e., mill aluminum, bare steel, etc.)
To surfaces in contact with food
For use underwater or in other applications where the product will be in continuous contact with water
Handling and safety
Product safety information required for safe use is not included in this document. Before handling, read product and material safety data sheets and container labels for safe use, physical and health hazard information. The material safety data sheet is available from baiyun sales application engineer, or distributor, or by calling baiyun customer service.
Usable life and storage
When stored at or below 27ºc (80ºf) in the original unopened containers, baiyun ST 3521 silicone weatherproofing sealant has a usable life of 12 months from the date of manufacture.
Health and environment information
For information and advice regarding transportation,handling,storage and disposal of chemical products,users should refer to the actual material safety data sheets containing physical,ecological toxicological and other safety-related data.
Limited warranty information – please read carefully
The information contained herein is offered in good faith and is believed to be accurate. However, because conditions and methods of use of our products are beyond our control, this information should not be used in substitution for customer’s tests to ensure products are safe, effective, and fully satisfactory for the intended end use. Suggestions of use shall not be taken as inducements to infringe any patent.
