Polyurethane sealants have long been the standard in construction when it comes to reliable, durable and elastic sealing and bonding. But even the best material will not give the desired result if it is not applied correctly.

In this article, we will look at how to properly work with Teknopoliderz 1K polyurethane sealant so that the seam does not crack and lasts for years.

Where is Teknopoliderz 1K polyurethane sealant used?

Teknopoliderz 1K polyurethane sealant is suitable for:

  • sealing joints in concrete

  • joints between panels

  • cracks in walls and floors

  • facade and roofing works

  • seams around windows and doors

The main advantage is elasticity and adhesion to various surfaces, such as concrete, metal, wood, and stone.

Preparing the substrate before applying sealant

If you ignore proper surface preparation, it will be difficult to achieve the desired result, even using Teknopoliderz 1K sealant with 800% elasticity.

Before applying you need:

  • clean the surface from dust, dirt and oil

  • remove weak and brittle areas

  • dry the substrate (moisture significantly reduces adhesion)

If this is not done, the sealant may simply come off along with the top layer of concrete.

Is a primer needed before applying polyurethane sealant?

In most cases, Teknopoliderz 1K has excellent adhesion to various surfaces without a primer.

But if:

  • porous surface

  • The concrete is old and brittle.

  • the surface is dusty

It is better to use a primer - Teknobond 110 solvent-based polyurethane primer to strengthen, dedust the base, and enhance the adhesion of the sealant to the surface.

How to apply sealant correctly 

  1. Installing sealant into the gun

  2. Trim the spout according to the thickness of the seam

  3. Fill the seam evenly

  4. Avoid air voids

  5. Level with a spatula or finger (dipped in soapy water)

Important: the sealant must contact the sides of the seam, not the bottom. To do this, according to the technology, you need to use a sealing PPE harness of the appropriate diameter. 

Drying time of polyurethane sealant

  • initial setting - several hours

  • complete polymerization - depends on the layer thickness

The thicker the layer, the longer the sealant takes to harden.

Common mistakes when applying polyurethane sealant

❌ application on dust or dirt
❌ too narrow or deep seam
❌ lack of sealing tape
❌ working on a weak base

The result is the same - the sealant does not work as it should. Even the most elastic sealant will not save if:

  • the foundation is crumbling

  • concrete is crumbling

  • there is peeling

First, reinforcement and repair, then sealing of seams, joints and adjacencies.

Teknopoliderz 1K is a modern one-component polyurethane sealant that combines high elasticity with excellent moisture resistance. The material is designed for reliable sealing of both horizontal and vertical joints, providing long-lasting protection against moisture, cracks and deformations even in difficult operating conditions.

Teknopoliderz 1K is not just a “joint putty”, but a full-fledged tool for:

  • protection of structures

  • deformation compensation

  • long-term sealing

  • bonding different materials together, when an elastic connection is required between concrete and metal, wood, brick...