Viopol Newsletter

Insulating Properties with V-PUR S-97L | Essential Tips for a Successful Summer Application

Typically, as you would anticipate summer is the busiest period for insulating properties using the most popular method of polyurethane in the form of spray, non-other than V-PUR-S-97L. Mainly due to the nice weather, high temperatures and low humidity levels. Even though the application process might sound pretty straightforward there are a number of factors that could, if not taken into consideration, create problems. Hence why we feel that this article would be useful as it highlights all these elements & gives a few tips so you can get a guaranteed successful end result. 

1. Weather Conditions

• Ambient temperature higher than 15oC

• Atmospheric humidity less than 60%

• Avoid spraying under windy conditions                             

2. Substrate Condition (concrete, cement) and Preparation

A) Concrete should be cohesive and not loose

Cohesive strength of concrete must be higher than 1.5 N/mm2.

When in doubt regarding the substrate’s cohesion, or the cohesive strength is less than the value mentioned above, the use of a primer is mandatory.

B) The concrete should be CLEAN and DRY

Furthermore, any kind of paint, whether this is aliphatic PU or any other type, previously applied on the concrete surface, MUST BE REMOVED, so that no trace is left.

3. Substrate and environmental conditions prior to application

• Substrate moisture (Hsub) must be less than 4%

• Substrate temperature (Tsub) must be higher than 15oC

• Dew Point (tdew) must exceed substrate’s temperature by more than 3oC

4. Application

• During spraying process, make sure that the pressure and temperature values are on manufacturer’s specifications.

• The flatness of the foam, following the spraying process, depends on a number of factors, such as:

a) Weather conditions (Wind levels during the process)

b) The type of gun used (mechanical or air purge ) and the mixing chamber (size, type)

c) Applicator’s experience

• Keep a steady tempo while spraying.

• Maintain a certain distance from the surface that will guarantee the best possible results.

• While spraying, a parallel movement from the surface and not a curved one should be achieved. This can be guaranteed through a steady wrist.

• A cooling period of time between each layer is mandatory in order to avoid layers’ delamination or foam’s self-ignition.

• Apply all layers on the same day.

The Mindful Team Workshop for VIOPOL

The Mindful Team. This is the title of the 3-day experiential Teambuilding Workshop that took place for VIOPOL Team between the 2nd & 4th of June 2023, at Steni, a very picturesque little village near the mountain Dirfis at the center of Evia Island. This workshop was another significant milestone for the VIOPOL team in their development journey; focused on how inner balance and alignment of every team member can have an important impact on the bonding, growth and effectiveness of the individual & the whole team.

The team embraced nature by becoming part of it & what has to offer. People shared their thoughts, ideas and emotions and enjoyed their interaction in a context of creativity, positivity and relaxation. Feelings like trust, acceptance and respect were expressed throughout the whole process, facilitating the approach of Mindful Mindset.  While exploring the Alignment Model of Moral Intelligence (Doug Lennick – Fred Kiel, Ph.D.) and understanding the way moral intelligence can enhance business performance and leadership success, offering every participant the opportunity to identify new challenges and areas for improvement and change, in both strategical and operational level. All VIOPOL people shared this experience in an open and authentic way and felt empowered to achieve personal and organizational goals.

The workshop was created and performed by Dr. Evangelia Fassoula.