Sealants

What are sealants and what are they used for?

Sealants are used to permanently seal joints, connections, and transitions. They protect against moisture, drafts, dirt, and material movements and are used both indoors and outdoors. Depending on the application, sealants differ in their chemical composition, elasticity, and adhesion to various substrates.

In this category, you will find high-quality sealants for professional applications in sanitary areas, construction, and for repair and assembly work.

Overview of Sealant Types

Silicone Sealants

Silicone is the most commonly used sealant for elastic joints. It is particularly suitable for areas with high humidity or significant movement.

Typical applications:

  • Bathroom, shower, and toilet

  • Kitchen and plumbing installations

  • Glass, ceramic, and tiles

  • Indoor and outdoor applications

Properties:

  • permanently elastic

  • water and weather-resistant

  • mildew-inhibiting (for sanitary silicone)

Acrylic Sealants

Acrylic sealants are primarily used indoors when joints need to be painted over later.

Typical applications:

  • Wall and ceiling connections

  • Cracks in masonry

  • Connection joints for windows and doors

Properties:

  • paintable

  • easy to process

  • ideal for dry areas

Hybrid & MS Polymer Sealants

Hybrid sealants combine the advantages of silicone and acrylic. They are suitable for demanding applications in construction and assembly.

Typical applications:

  • Construction and expansion joints

  • Assembly and bonding applications

  • Metal, concrete, wood, and plastic

Properties:

  • high adhesive strength

  • elastic and paintable

  • often solvent- and silicone-free

Branded Sealants for Professional Demands

OTTO-CHEMIE Sealants

OTTO is one of the leading manufacturers of sealants and adhesives for trade professionals. The products stand for high quality, tested safety, and reliable application.

Popular products in the range:

  • OTTOSEAL S100 – Sanitary silicone for bathroom and kitchen

  • OTTOSEAL S110 – Natural stone silicone for sensitive surfaces

  • OTTOSEAL S70 – Universal silicone for versatile applications

  • OTTOSEAL M360 – Hybrid sealant for assembly and construction

  • OTTOSEAL M361 – Textured hybrid sealant for assembly and construction

  • OTTOSEAL A205 – Premium acrylic sealant 

  • OTTOSEAL A215 – The granular crack and repair filler

These products cover most typical requirements in the sanitary, construction, and assembly sectors.

Which sealant is the right one?

The choice of the appropriate sealant depends on several factors:

  • Substrate (e.g., tiles, natural stone, metal, wood)

  • Application area (indoor or outdoor)

  • Moisture exposure

  • Desired elasticity

  • Paintability

For wet areas, a high-quality sanitary silicone is generally recommended, while for construction and assembly work, hybrid sealants are often the better choice.

Matching Accessories & Complementary Products

For optimal results, additional items are recommended:

  • Cartridge guns

  • Jointing tools for smoothing

  • Cleaning and smoothing agents

  • Cleaning cloths for preparation and finishing

This ensures clean, long-lasting joints.

Frequently Asked Questions about Sealants

What is the difference between silicone and acrylic?

Silicone is elastic and waterproof, while acrylic is paintable but less moisture-resistant.

Can sealants be used outdoors?

Yes, many silicone and hybrid sealants are weather and UV-resistant and suitable for outdoor use.

How long does a high-quality sealant last?

With proper application, quality sealants can maintain their elasticity and sealing properties for many years.