What is NPG gelcoat?
Gelcoat Iso/npg is a gelcoat based on a mixture of pre-accelerated neopentylglycol and isophtalic unsaturated polyester resin, pigmented with lightfast pigments.
Why use gelcoat with wax?
Gelcoat with wax has had paraffin wax added to it. When the gelcoat is catalyzed with MEKP, the wax rises to the surface throughout the cure, keeps the air from contacting the gelcoat, and allows the gelcoat to fully cure. If catalyzed with MEKP, gelcoat with wax will cure completely, in normal application conditions.
How much does a gallon of gelcoat cover?
between 40-80 square feet
Coverage. Coverage will vary depending on application techniques and desired thickness. Typically, however, one gallon of gel coat will cover between 40-80 square feet at 20-25 mils.
How thick is gelcoat?
Measurements typically involve a range of approximately 0.25 mm to 1 mm (0.010 in. to 0.040 in.), with most cases involving a nominal thickness of around 0.5 mm (0.020 in.).
Should I use gelcoat with or without wax?
The gel coat needs the wax to fully cure, so the final coat needs to have the wax in it. However, the gel will not properly bond with the coat below it unless you sand the surfacing wax off. A common practice when applying multiple coats is to use unwaxed gel at first, and use gel with wax added for the final coat.
Can you apply gelcoat with a roller?
If you want to roll on a gelcoat, be sure to use a 1/8 “or 1⁄4” solvent-resistant nap. Be sure not to use foam rollers because they tend to leave the bubbles. If you brush on the gel coat, make sure to use a solvent resistant brush.
What causes orange peel in gelcoat?
Orange peel is typically the result of: an improper painting technique. painting on hot surfaces. the quick evaporation of paint thinner.
Can you brush or roll on gelcoat?
You may either roll the gelcoat on, like paint or spray it on, to apply the gelcoat. A Brushable Gel coat that can be applied with a brush and does not need any other additives except MEKP is included with your Brushable Gelcoat. If you want to roll on a gelcoat, be sure to use a 1/8 “or 1⁄4” solvent-resistant nap.
Do you sand between gel coats?
Sanding between coats is not necessary unless a surfacing agent has been added to your gel coat. Once your repair is covered, feather a ‘flow’ or sanding coat on the masked-off area making layered passes to avoid a buildup of gel coat in any one area. Each of these coats of gelcoat may involve several passes.
Do I need to sand between coats of gelcoat?
Can you buff out orange peel?
Pick up a fast cut compound designed for vehicles to buff the bumps out. The best way to remove orange peel without sanding is to use fast cutting compound. Cutting compound is an abrasive paste that will erode an extremely thin layer of paint and wear away the orange peel in the process.
Will wet sanding remove orange peel?
Wet-sanding (or “color sanding” if you’re old school) is the recommend way to eliminate deep defects, orange peel, or painting defects from a painted surface. This method will ensure a more constant finish and is overall safer than dry-sanding.
Can you gelcoat over existing gelcoat?
First thing you want to do is look at the surface you want to apply gelcoat to. If the surface is already covered with gelcoat, or if the surface is a fiberglass, or polyester resin, then applying gelcoat will be a snap. If the surface is paint, then the paint would have to be removed before applying the gelcoat.