Sealants

Industrial sealants are essential for protecting assemblies, sealing joints, and preventing moisture, chemicals, air, and contaminants from compromising performance. Whether you're manufacturing equipment, maintaining industrial assets, or completing repairs in demanding environments, selecting the right sealant is critical for long-term reliability.

Perigee Direct supplies professional-grade silicone sealant, polyurethane sealant, RTV silicone, MS polymer sealant, and high-temperature sealant products from trusted manufacturers. Our solutions support customers across aerospace, laboratory and sciences, manufacturing, and MRO industries that require dependable performance in challenging operating conditions.

With technical product expertise, same-day shipping on most orders, and experience handling dangerous goods shipments, Perigee Direct helps industrial teams get the sealing solutions they need quickly and confidently.

7 Products

BUYER'S GUIDE

How to Choose an Industrial Sealant

Choosing the right sealant starts with understanding your application, operating environment, and substrate.

  • Silicone sealant offers excellent UV resistance, weatherability, and flexibility, making it a popular choice for outdoor applications, expansion joints, glazing, and environments exposed to moisture or temperature fluctuations.
  • Polyurethane sealant provides outstanding adhesion and durability on concrete, metals, wood, and many construction materials. It's ideal where abrasion resistance, paintability, and strong mechanical performance are priorities.
  • MS polymer sealant combines many of the advantages of silicone and polyurethane. It offers strong adhesion, excellent flexibility, UV resistance, and can typically be painted once cured, making it a versatile solution for industrial assembly and maintenance.
  • RTV silicone cures at room temperature and is commonly used for gasketing, sealing electronic components, and machinery and equipment exposed to elevated temperatures. When heat resistance is critical, a high-temperature sealant provides reliable sealing performance while maintaining flexibility under thermal cycling.

When selecting an industrial sealant, consider temperature exposure, UV and weather resistance, movement capability, cure speed, paintability, and compatibility with the materials being bonded or sealed.

PRODUCT GROUPING INTROS

Silicone Sealants

Designed for long-term flexibility and weather resistance, silicone sealant products perform well in indoor and outdoor applications where moisture, UV exposure, and temperature changes are common.

Polyurethane Sealants

Polyurethane sealant products deliver strong adhesion, excellent durability, and abrasion resistance for demanding construction, manufacturing, transportation, and industrial maintenance applications.

MS Polymer & Hybrid Sealants

MS polymer sealant technology combines high-strength bonding with lasting flexibility and weather resistance while offering the added benefit of paintability for many applications.

High-Temperature Sealants

When sealing components exposed to elevated operating temperatures, RTV silicone and high temperature sealant products provide dependable performance for engines, industrial equipment, ovens, and manufacturing systems.

FAQS

What is the difference between silicone and polyurethane sealant?

Silicone sealant provides superior flexibility and weather resistance, while polyurethane sealant typically offers stronger adhesion, greater abrasion resistance, and better paintability for structural applications.

Which sealant is best for high temperatures?

For applications exposed to continuous heat, RTV silicone or another high temperature sealant is generally the preferred choice because it maintains sealing performance under elevated temperatures.

Can you paint over silicone sealant?

Most standard silicone sealants cannot be painted. If paintability is required, consider a polyurethane sealant or MS polymer sealant, depending on the application.

What is an MS polymer sealant?

An MS polymer sealant is a hybrid sealant that combines excellent adhesion, flexibility, UV resistance, and weatherability while remaining paintable in many applications.

Which sealant offers the best chemical resistance?

The best choice depends on the chemicals involved and the operating environment. Silicone, polyurethane, and hybrid sealants each offer different levels of chemical resistance, so reviewing the product specifications is recommended before selecting a solution.