Weatherseal Sealants


Outstanding Weatherability. Excellent Adhesion. Long-term Performance.

Whether it’s glass to glass, glass to metal, or prefabricated builds - get a secure bond with TOSSEAL 381 silicone sealant.

Available in:
North AmericaLatin AmericaEurope, Middle East & AfricaIndia & PakistanSoutheast AsiaAustralia & New ZealandJapanChina

Protect your project with the help of TOSSEAL 381 – our one component silicone sealant suitable for glass-to-glass, glass-to-metal sash bonding, prefabricated housing, freight containers, and cold storage rooms interior sealing in building and housing.

TOSSEAL 381 offers all the unique features of silicone rubber such as water resistance and outstanding weatherability, as well as providing excellent adhesion to numerous construction materials - including glass, metal, and concrete.

It also has the additional benefit of being non-corrosive to metal – meaning it can be specified in a wider range of projects.

Ready-to-Use. Neutral Cure. Superior Temperature Resistance.


Excellent Durability

  • Superior high and low temperature resistance
  • One component, ready-to-use sealant
  • Room temperature cure

 Practical Application

  • Neutral cure (ketoxime cure)
  • No acetoxy odor during cure
  • Easy gunnability over a wide temperature range
  • Maintains good flexibility
  • Excellent adhesion to many materials
Product Video

Dark Brown
Light Grey
Aluminum Grey
Available Sizes

TOSSEAL 381 is available in 310ml cartridge available in cases of 50 (5boxes of 10 cartridges), an 18kg pail and 200kg drum.

View our other Weatherseal Sealants
Filter by region

Have a question?

Connect with our silicones for building specialists for expert advice tailored to your needs, or discuss your project with a local sales representative today to discover the best solutions and insights.

Looking for a document?

Our document center has a comprehensive range of product information, technical documentation, certification, brochures and sell sheets, alongside relevant product case studies and more.

Explore our Documentation

Keep updated with our email roundups.

Stay in the loop with exclusive industry insights, product news, webinars and events.

First Name
Last Name
Company Name

By clicking submit, I confirm that I have read and agree to the Privacy Statement.

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.