
RT-8500 STRUCTURAL SILICONE SEALANT FOR CURTAIN WALL
Overview
RT-8500 is a ready to use, one component, neutral fast curing silicone sealant for structural applications. It cures at room temperature by the action with atmosphere moisture to become a permanently flexible silicone sealant. It has good adhesion with wide range of surfaces without the need of priming and professional quality.
PRODUCT FEATURES
· Single Component,neutral curing,high adhesion,medium and high modulus,with strong displacement capacity;
· It can obtain excellent bonding and sealing performance without primer with most building materials,and has good extensibility,water tightness and other functions;
· After curing,the product forms a cold resistant,heat-resistant and corrosion-free elastomer,which has excellent weather resistance,aging resistance,ultraviolet resistance,ozone resistance and high and low temperature resistance,and has no pollution to the environment;
· It has good compatibility with other silicone adhesives of Runtai.
APPLICATION AREA
· Structural bonding,assembly and sealing of glass curtain wall,stone(marble,granite) curtain wall,aluminum curtain wall and metal structure engineering;
· It is applicable to the staggered connection or butt joint between glasses,the second bonding and sealing of lighting roof and hollow glass;
· Sealing and bonding in high-rise buildings and industrial applications;
· It is applicable to curtain wall design of semi concealed frame or fully concealed frame projects and other types of building and industrial sealing.

|
ITEM |
SPECIFICATION |
TEST RESULT |
1 |
Appearance |
Smooth, cream or heavy body, no bubble, no skinning, no gel. |
Smooth, cream or heavy body, no bubble, no skinning, no gel. |
2 |
Droop, mm |
Vertical |
≤3 |
0 |
|
|
Horizon |
No deformation |
No deformation |
3 |
Extrusion Property |
≤10 |
2.0 |
4 |
Tack Free Time, h |
≤3 |
0.8 |
5 |
Hardness, Shore A |
20~60 |
47 |
6 |
Thermal Aging |
Thermal Weightlessness, % |
≤10 |
4 |
|
|
Cracks |
No |
No |
|
|
Chalking |
No |
No |
7 |
Tensile Viscosity 23ºC |
Modulus, MPa |
≥0.60 |
1.25 |
|
|
Tensile Elongation, % |
≥100 |
213 |
|
|
Damage, % |
≤5 |
0 |
|
|
Modulus at Tensile 110% |
- |
0.25 |
|
|
Modulus at Tensile 120% |
- |
0.45 |
|
|
Modulus at Tensile 140% |
- |
0.67 |
8 |
Tensile Viscosity 90ºC |
Modulus, MPa |
≥0.45 |
0.96 |
|
|
Damage, % |
≤5 |
0 |
9 |
Tensile Viscosity -30ºC |
Modulus, MPa |
≥0.45 |
1.78 |
|
|
Damage, % |
≤5 |
0 |
10 |
Water Tensile Viscosity |
Modulus, MPa |
≥0.45 |
1.23 |
|
|
Damage, % |
≤5 |
0 |
11 |
Water-UV Tensile Viscosity |
Modulus, MPa |
≥0.45 |
1.17 |
|
|
Damage, % |
≤5 |
0 |
* At a temperature of 23 °C and relative humidity of 50%
* To avoid influence adhesion performance,pls warm the sealant above 5 °C before application
Please note: The typical properties are not intended for use in preparing specifications.
Please contact our local Sales Department for assistance in writing specifications.







FAQ
- Q1: Are you manufacturer?
A1: Yes, we are manufacturer. We have 2 factories which around 50,000 square meters, our production capacity is over 30000 tons per year, on time delivery is supported.
Q2: Do you provide OEM/ private label service?
A2: Yes, We offer OEM/private label services. Additionally, we provide free design and small MOQ for private label sealants.
Q3: What other products do you have?
A3: Runtai serves one stop solution of sealants & adhesives, including: PU Foam, Silicone Sealant, Acrylic Sealant, PU Sealant, MS Sealant, Spray Paint, Water Based Adhesive, Zero Nail Construction Adhesive, Marble Glue & Epoxy Resin.
Q4: Why do we choose you?
A4: With 2 factories which are around 50,000 square meters,Runtai is called one of the biggest manufacturers in China. Our products are fully comply with American & European standards. We supply to fortune TOP 500 enterprises in more than 50 countries, which is the Top10 customized Export Volume in China.
Q5: Can I get a free sample?
A5: We offer free samples for clients. Please feel free to contact us for more details , we can recommend the suitable samples according to your requirement.
Q6: What is benefit to be your distributors?
1. We support our distributor to become stronger.
2. We provide technical Know-How on selling.
3. We train our distributor's sales team.
4. We train our distributor's dealers.
5. We support you to become better.