
Topsen 620 is a one-component, neutral-cure, weatherproof silicone sealant that offers excellent adhesion to most common building materials. It is non-corrosive to the majority of substrates, with the exception of copper. The sealant is easy to apply, cures quickly, and provides high hardness with strong elasticity.
Product | TOPSEN Weatherproof Silicone Sealant |
Model No. | 620 |
Type | Neutral Curing |
Quality guaranteed | 5 years and above |
Color | Clear, Black, White, Gray or as customized |
Usage temperature | +5ºC~+40ºC |
Applicated temperature | -40ºC~+150°ºC |
Packing | 300ml/Cartridge, 24pcs/Carton; 590ml/Sausage , 20pcs/Carton; 200L Barrel |
Shelf life | 12 months from the date of manufacture |
Features | 1. Room temperature curing, neutral type; 2. Good adhesion to most common building materials; 3. Non-corrosion to most building materials except copper; 4. Easy using, fast curing, high hardness, and strong elasticity |
Application | Good adhesion to most of the common building materials, non-corrosion to most building materials except copper |








Frequently Asked Questions:
Discover fun facts about construction sealants - waiting for you to uncover in our pages! :-D
(1) Why Moisture Matters for Silicone Sealants?
Silicone sealants cure through a reaction with moisture in the air. That's why proper ventilation and humidity levels are important during application-too dry, and the curing process slows down; too humid, and it might not adhere proprly!
(2) Materials That Silicone Sealant Won't Stick To
Silicone sealant generally provides excellent adhesion to most construction and industrial materials. However, it does not adhere well to certain surfaces, such as those containing oil, plasticizers, or specific metals like copper, lead, and galvanized steel. To ensure optimal adhesion, it's essential to clean surfaces thoroughly and remove any contaminants that may interfere with the bond before applying silicone sealant.
Find more fun facts on our store or website!
As a trusted sealant supplier, Topsen is dedicated to delivering exceptional service to our valued customers:
Premium Quality: Topsen supplies top-tier silicone sealants that consistently meet industry standards and exceed customer expectations.
Diverse Product Range: We offer a comprehensive selection of silicone sealants tailored for various applications, including high-strength acetoxy, neutral cure, and specialized sealants.
Expert Technical Support: Our team provides expert guidance on product selection, application techniques, and troubleshooting to ensure optimal results.
Tailored Solutions: We offer customization options to meet specific customer needs, such as custom colors, viscosities, or curing times.
Training and Education: We conduct training sessions and workshops to educate customers on the proper use of silicone sealants, safety protocols, and best practices.
Prompt and Reliable Delivery: We prioritize fast, dependable delivery to meet your deadlines, with express shipping options available for urgent orders.
Consistent Stock Availability: We maintain sufficient inventory levels to prevent delays in order fulfillment.