What size nozzle for gel coat?

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#1

I bought a G100 dump gun so I could spray surface gel coat for mold making. The gun came with a #6 nozzle for gel coat but when I tried spraying my black tooling coat from fibreglast it dripped out of the nozzle bad. The resin is way too thin for such a large tip, I think it’s 3/16". so I’m wondering what size nozzle others are using for spraying gel coat with a dump gun?

#2

use a regular hvlp air gun… a 1.2 nozzle will be fine, specially if your mixing it with the gloss additive…

#3

Thanks I will try that if the cup gun doesn’t work out. I ordered a smaller nozzle to see if it helps.

#4

I use an ordinary HVLP with 3.0 tip and some times I need to thin the Gelcoat, I have also the G200 but couldn’t make it work and get a uniform coat of Gel coat.

#5

I use a HVLP gun with a 2.5 tip and have never had any issues. Then again I have only used it for gelcoat maybe a dozen or so times.

#6

Ive been using HVLP spray guns. Smallest I have for gel coat I use a 1.5 tip and biggest is 3.0. I also have a dump gun but use it when I need to spray big molds.