Frequently Asked Questions
The superior weatherability of the LUMIFLON resin family has been proven over the years by extensive lab testing and countless exterior structures that have been coated with these products. The LUMIFLON resin component plays a big part in protecting itself and other resin components from the destructive UV rays of the sun. However, this protection has limitations when it comes to protecting the pigments in the formulation. The proper pigment choice will insure good color retention. If it is possible to use inorganic pigments to achieve the target color of your formulation, use them. When choosing organic pigments, choose those pigments that boast a high degree of light fastness. It is important to keep in mind that pigments which are mediocre performers when exposed to sunlight will always be mediocre performers – even in LUMIFLON resin-based formulations. They will still need the help of UV absorbers and hindered amine light stabilizers. The protection from UV degradation courtesy of the LUMIFLON resin for these organic additives has yet to be determined. However, the increased longevity of the coating film will keep these additives from eroding out of the film.
The refractive index of an FEVE clearcoat formulation is 1.43. Since the refractive index of both glass and clear acrylic is 1.51, the FEVE coating is considered to be optically clear.
We use a BYK micro-gloss meter.
Mineral and wax matting agents have been tested. Awareness of CPVC is helpful in optimizing performance properties when adding inorganic solids.
We have had customers tell us that coatings with FEVE have improved cleanability. Due to the alternating chemistry of the polymer, it does not have the extremely low surface energy that you would see with a neat fluoropolymer. Because of this it is not anti-graffitti by itself. An additive would be needed for that.
Some Polyurethanes Perform Differently When Provided In Different Colors. Have You Seen Any Such Variations With The FEVE Coatings?
FEVE coatings provide excellent color retention when high performance pigments are used. Sometimes a color changes due to gloss reduction. FEVE resin-based coatings retain their gloss for a long time, so this situation does not occur.
When recoating an FEVE coating no special treatment is required compared to any conventional coating system. Depending on the age of the coating to be recoated, some surface prep may be required as might be needed in any coating system.
We have not tested reflective pigments in FEVE coatings. We have tested glass microspheres and saw no issues with incorporation.