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Technical Specifications of COLO-FAST®
Window Encapsulation Projects
Comparison of COLO-FAST® to other Window
Encapsulation Materials
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Due to its versatile properties, polyurethane (PU) is
the ideal material for window encapsulation. Low viscosity and low molding pressure allow for
encapsulation from small to very large parts (including windshields and
backlights). By means of reaction
injection molding (RIM) the PU is molded directly on to the glass, thus
covering the transition from glass to car body. |
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Here are just a few advantages of window encapsulation with PU:
- Styling flexibility:
The freedom of design sets new standards, because it is now possible to
combine functional elements with demanding design. The PU encapsulation can be designed with thin sections, thin lips and sharp
corners. The cross-section at each side of the encapsulation can be
different to smooth out differences of the car body.
Flush glazing:
Use of modular windows with low profile PU encapsulation gives vehicles a
streamlined appearance and thus improved aerodynamics and noise
reduction.
- Multifunctionality:
The encapsulation process allows us to incorporate inserts such as
mounting bolts, clamps, hinges, grips, windscreen wipers, third stoplight and
electrical wiring. Other ideas may be discussed with Design and
Manufacturing Engineering. By application of the encapsulation technology the glass is being
transformed into a multifunctional module ready for fully automated
assembly.
- Longevity
RIM Encapsulation is a low-risk proven technology. Aging has no effect on the mechanical properties.

RECTICEL COLO-FAST® is the ultimate light
and heat stable polyurethane for this technology. Based on aliphatic
isocyanates, COLO-FAST® is integrally colored. It does not require
post painting or in-mold coating to prevent UV-degradation of the
exposed polyurethane. Even when the encapsulation is damaged there is no
deterioration. In addition, COLO-FAST® offers up to 30% weight advantage compared to thermoplastic products.
For these reasons window encapsulators and car manufacturers all over the world have selected RECTICEL's COLO-FAST® for their vehicles.
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