Frequently Asked Questions
FEVE coatings can be field applied at typical ambiemt temperatures. The waterbased systems need to be applied at temperatures above freezing.
The only detriment to the use of FEVE resins in coatings is their cost.
FEVE are unique amongst fluorinated resins because they can be formulated like any other typical organic resin. Because FEVE resins can be formulated into traditional coating systems no special application techniques are required.
We have been testing one-component FEVE-based coatings on wood substrates.These are different than the isocyanate-catalyzed two-component coatings.
Personal protection will be no different than with traditional solventborne coatings that are catalyzed with an isocyanate.
FEVE resins can be used in paints for this application. Patching of an FEVE based coating would be no different than patching a traditional coating.
FEVE based coatings can be used in this application. Repair/recoat would be similar to traditional paint systems. Sand-blasting is a good form of surface prep; however, it is not absolutely necessary for FEVE based coatings. FEVE-based coatings are recoatable.
FEVE based coatings are ideal for topcoat applications. The superior protection of a coatings system is realized this way. FEVE based coatings protect basecoats and mid coats.
Are There Any Special Precautions Or Instructions That Should Be Known Before A Proper Application Of These Coatings Can Be Done?
No. FEVE resins are similar to conventional coating resins in their use and application.
Yes. FEVE based coatings can be recoated. Of course, proper surface preparation is always important.
Yes. FEVE powder resins are typically applied by electrostatic spray.
Yes. Transparent or clear coats can be formulated with FEVE resins.
FEVE Coatings, both solvent-based and water-based types, can be directly applied to concrete surfaces that are fully cured, which is typically 28 days after installation. However, concrete surfaces are very porous and will absorb a high percentage of the coating applied to bare concrete. Since the main function of FEVE coatings is a weatherable finish and these coatings are higher in cost than conventional concrete finishes, we recommend the use of a primer-sealer as the first coat on bare concrete.
Can FEVE Coatings Be Used To Recoat Fiber-glass Reinforced Polymer (FRP) Face Sheets Of Translucent Skylight Panels That Had Originally Been Coated With Polyvinyl Fluoride (PVF) Film?
Yes. However, if the PVF film is still in place, it should be removed. Any adhesive remaining on the FRP substrate should also be removed prior to coating. A primer may be required to ensure good adhesion between the FEVE coating and the FRP. It is best to do a test patch on the FRP and check for proper adhesion.
Can a Fluouropolymer Be Recoated On itself? If So, What Type Of Minimum Surface Preparation Required To Achieve Maximum Life Cycle?
Yes it can. However, a fully cured FEVE coating needs to have some surface preparation. The SSPC-SP 3 preparation method is recommended. This is identical to the preparation used for recoating fully cured polyurethane coatings.
Using A Three Coat System, What Intermediate Coating Material Will Give Best Adhesion Given A Zinc Material Used As The Primer?
2K epoxy coatings. LF has excellent adhesion to all epoxy coatings when the epoxies are coated during their recoat window time.
Yes. We have tested FEVE resins in wood coatings. Formulations based on FEVE resins have shown significant improvement in water resistance after natural weathering.
FEVE based coatings can be used over steel. Typically, the FEVE resin would be part of the protective topcoat that is applied over a primer or possibly a primer and mid-coat.