Improve IG performance with Thiover

Fenzi North America laboratories have demonstrated the superior performance of Thiover as a secondary seal versus normal silicones: the polysuphide sealant by the Fenzi group reduces gas leakageTypically it is assumed by architects, designers and builders that the primary seal prevents leakage and the secondary seal holds the glass lites together, however among manufacturers it is understood that a perfect primary seal is not always feasible to attain therefore properties of the secondary seal come in to consideration at all times.

Common application defects in the primary seal are complete gaps in the PIB, uneven application and in some cases uneven wetting out due to incomplete pressing of the units.

Albeit what seems to be a minor issue, could be a cause for serious failures as an insulating glass unit (IGU) starts to age. A study conducted by Fenzi North America highlights this issue. Theimproper application of PIB and the effect it has on an insulating glass unit using varying sealants was studied. Each unit that was analyzed was given a 1 cm gap in the PIB on one side of the unit to see the affect of a commonly occurring deficiency. The units were then subjected to high humidity testing where the temperatures were controlled at 60°C and relative humidity at 98%.

The table below briefs the results that were found in this study.

The results show that polysulfide is again the best choice as a secondary sealant, with it losing less than eight percent from original over 1680 hours of high humidity and high temperature and silicone losing up to twenty percent from original in that same time span.

There are several factors that contribute to these results such as the physical gas retention properties of silicone and polysulfide which are explained in the table below.

Click to enlarge

UserFiles/tab2bis(5).jpg

Differences in mechanical properties of the two sealants also contribute to this wide variance in performance.

These properties, in addition to its extraordinary ease of use, make Thiover the world’s best-selling sealant.

FENZI SpA

Zona Ind. – Via Trieste, 13/15 – 20067 Tribiano (Mi)

www.fenzigroup.com

600450 Improve IG performance with Thiover glassonweb.com

See more news about:

Others also read

Take a look at Tecglass' technology at work.
Quality, superior performance, customer-oriented solutions and automation are the key features of the products showcased at Glasstec.
Whether the application is automotive, home appliance, architecture, interior design or many others, Tecglass is the perfect place to find the right ink for any industry and all kinds of glass.
Showstoppers at the event were live printing demonstrations offered by Tecglass for the many visitors who crowded the Fenzi Group stand.
With Jetver Ultra, Tecglass brings sweeping changes to the inks sector for digital printing on glass.
In the spotlight of The Big 5 show will be Jetver Ultra, the new line of ceramic inks custom-developed to intensify the colors of glass walls and allow designers around the world the utmost freedom of expression.

From industry

Add new comment