Interior vs. Exterior Gelcoat

Brushable gelGelcoat is a big part of our business here at FGCI. When looking at gelcoat, there is a wealth of options to choose from. The most obvious first choice is the color of the gelcoat; we have a vast array of over 25 stock colors with the ability to color match to a sample you provide. Once you have the color figured out, comes whether you want to brush the gelcoat or spray it, as we have the ability to do either. Lastly, however, is the option many people have a question about; interior or exterior. Let’s look at both options so you know which you will want for your job.

Exterior Gelcoat is our tried and true standard. If our gelcoat doesn’t specify interior or exterior, then the answer is automatically exterior gelcoat. It doesn’t mean that the gelcoat is only good for external use, or the outside of a boat, it means, simply that it does NOT have wax or Sanding Aid mixed in. This means that the lack of Sanding Aid will result in a tacky finish. If you want to avoid the tacky finish, you will want to add something like Sanding Aid, Patch Booster or Duratec to the mixture. This is mainly used as your primary coat or coats as you do not have to sand between coats, given you don’t wait too long.

Interior Gelcoat doesn’t mean the gelcoat can only be applied inside, it means it has Sanding Aid or Wax mixed in. Interior Gelcoat is used as a final coat, due to the Sanding Aid allowing it to dry tack-free, it will give a nice finish. You will not want to add Duratec or Sanding Aid to this product. If you use this product as your primary coat and look to add another coat, you will need to sand it first.

Now that you know which product you need, you can buy your gelcoat with confidence. And as always, remember that we are here to help with any questions you have!

2 thoughts on “Interior vs. Exterior Gelcoat

  1. dane shull April 25, 2017 / 11:57 am

    I have a gallon of product code 126130 gelcoat, batch code 03216V04. Is this an interior or exterior gelcoat? thanks Dane

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