Curing and Drying
Can Variopox materials be cured at increased temperatures?
Yes, but wait for at least 30 minutes after application of the final layer. Then increase the temperature up to 40 oC.
Adhesion
Does epoxy resin adhere to (new) polyester?
Yes, but only when the polyester resin has been sufficiently cured. The polyester laminate has to be at least two to three weeks old. Always degrease and sand the surface!
Can I use epoxy materials to repair polyester?
Yes, new polyester has to be at least two to three weeks old.
Can I bond the plywood with Variobond Flex or Variobond directly?
No, it is better to apply one coat of Variopox Injectiehars first, to sand it with coarse gritpaper and, only after that, apply the bonding paste.
Can I repair epoxy with polyester?
No, polyester adheres very poorly on an epoxy laminate. This also applies for polyester filler
Why have layers of Variopox Impregneerhars a poor intercoat adhesion?
After 24 hours at room temperature, an epoxy resin is quite hardened. Therefore, the next layer bonds insufficiently on this surface. Sand the previous layer before applying a new layer to achieve a good adhesion.
Surface defects
Why does a sticky greasy surface appear on the layer of Variopox Injectiehars, Variopox Impregneerhars or Variopox Universele Hars?
Several causes can could give this result, for example: a wrong mixing ratio of basis and hardener or a too low temperature during the application and the hardening process.
Why do the layers of Variopox Injectiehars, Variopox Impregneerhars of Variopox Universele Hars become hazy?
When the first layer of epoxy becomes hazy, this means that it has been applied to a damp surface. The humidity of the wood should not exceed 12%.
Why does Variopox yellow on a white surface ?
All epoxy resins yellowing. The degree of yellowing dependents on the type of resin and hardener used.
Why does the layer Variopox Impregneerhars become dull?
The durability and gloss retention of epoxy materials is poor. Influenced by UV radiation, yellowing and chalking will take place, which causes the layer to become dull.
Temperature
At what temperature should I apply epoxy materials?
A temperature between 15 and 25oC is required, unless the label or the technical information sheet say differently.
Application
Should I sand before applying the next layer?
Before applying the next layer, we recommend to degrease the epoxy materials after hardening. Next, sand it with a coarse grit paper and then degrease it again.
How can I clean brushes, rollers and other equipment?
Clean the tools and equipment that are used for the application of epoxy materials with Double Coat Degreaser or acetone.
Why are the materials so thick?
At a low temperature, the viscosity of the resin is higher. That is why the materials are difficult to work with. Make sure that the materials, the surface and the surrounding area have a temperature between 15 and 25 oC.
Why do I always need to repaint epoxy materials?
The UV resistance of epoxy materials is poor. Influenced by sunlight, yellowing and chalking will occur.
What is the correct mixing ratio of epoxy materials?
The correct mixing ratio of epoxy materials is always in parts by weight. The mixing ratio can be found on the label and in the technical information sheet.
What is the potlife of epoxy materials?
Apply the materials directly after the base and the hardener component have been mixed. The reaction between base and hardener will increase temperature and will reduce potlife. Therefore, always poor the mixed material in a tray so you can work with the materials for a significant longer period. The potlife can be found on the label and on the technical information sheet.
What type of glass reinforcement can I use?
Various materials are considered to be suitable, for example: glass fabric, glass roving, glass twill fabric, kevlar and carbon. Laminating wood with glass twill fabric results in a reinforcement that is hardly visible.
What solvent can I use for Variopox materials?
Do not use any solvent when processing epoxy materials.
Recoating
How soon can I repaint Variopox Impregneerhars or Variopox Universele Hars met Double Coat?
Variopox Impregneerhars or Variopox Universele hars have to be completely cured to achieve sufficient adhesion. At room temperature, this takes 14 days. Degrease and sand the Variopox Impregneerhars of Variopox layer before applying Double Coat, Double COat Karaat or Double Coat Dubbel UV.
How soon can I repaint Variopox Impregneerhars or Variopox Uiversele Hars with IJmopox HB coating?
After 24 hours, Variopox Impregneerhars or Variopox Universele Hars can be repainted with IJmopox HB coating. Degrease and sand Variopox Impregneerhars or Variopox Universele Hars before applying IJmopox HB coating.
Can I apply several layers Variopox wet-on-wet?
The next layer Variopox impregneerhars or Variopox Universeelhars can be applied when the previous layer is still somewhat tacky, this is usually 2 to 4 hours. An exception is Variopox Injectiehars, wait 24 hours before the next layer is applied.
Sanding
What is best: dry or wet sanding?
The best choice is dry sanding. Especially when a filler has to be sanded, it is better to use dry sanding. It takes quite some time before moisture has disappeared from the filler.