Harbor Freight HVLP gun full of goop

  • Advertise with us

« back to Woodworking Skill Share forum

Forum topic by Mainiac Matt posted 07-16-2017 04:27 PM 1570 views 0 times favorited 4 replies Add to Favorites Watch
View Mainiac Matt 's profile

Mainiac Matt

9600 posts in 3136 days

07-16-2017 04:27 PM

Topic tags/keywords: harbor freight hvlp gun

I purchased the Harbor Freight HVLP spray gun a couple years back when it was on sale for $12 (the magenta colored one). I opened the box to make sure everything looked in order and then put it in a drawer until today.

I’m going to try spraying some alcohol based die with the thing, and after reviewing some Youtube videos, I decided I had better clean it out first.

I was somewhat surprised that the inner chamber had all kinds of white goop that appeared to be silicone, on not only the threaded surfaces, but it had squeezed out into the body and was actually blocking some of the air channels.

I’ve invested over an hour, removing as much of this as possible with picks, brushes and knives and am ready to put it back together, and now I have some questions.

1. Has anywone else experienced this? (none of the Youtube set up videos had this much goop squeezed out inside)
2. Was I right to clean this out , or should I have left it in there.
3. It appears that rather than rely upon precision machining for good sealing components, they depend on putting silicone on everything. So should I wrap the internal threads with silicone tape prior to reassembly.

I’d very much appreciate if others who have used this specific gun could please comment on their experiences with it.

-- Matt -- I yam what I yam and that's all what I yam

4 replies so far

View MrUnix's profile (online now)


8162 posts in 3007 days

#1 posted 07-16-2017 04:40 PM

Yes, it comes with goop in it everywhere, and yes, you need to clean it out before using it (even states that in the manual). After that, you are good to go. The only place I will use some teflon tape is where the cup attaches to the gun… that little plastic bushing doesn’t really seal the connection very well, and it will dribble paint without any additional sealing if you don’t.


PS: They currently (July 2017) have a coupon online for them, good until the end of the month, for $9.99. Coupon code #16231253 in case the coupon disappears :)

-- Brad in FL - In Dog I trust... everything else is questionable

View BlazerGator's profile


25 posts in 1997 days

#2 posted 07-16-2017 05:18 PM

Hi, Matt—

Cleaning it was a good move. Mine didn’t have much goop in it, and it cleaned up fairly easily. I only added teflon tape where the air chuck is attached. I wouldn’t worry about the internal seals unless you have an issue in use. The sprayer has worked without trouble for me; of course, my needs are not terribly demanding, hence the inexpensive gun.

I suggest putting some of your cleaning solution in the cup and shooting it to catch any leftover goop you couldn’t reach. Take your time to get comfortable with the spray adjustments, etc., and I think you’ll be good to go.

Take Care,

-- Blaze

View Mainiac Matt 's profile

Mainiac Matt

9600 posts in 3136 days

#3 posted 07-16-2017 05:47 PM

I was expecting the innards to be coated with some type of oil or grease, but mine had rubbery white stuff in it

-- Matt -- I yam what I yam and that's all what I yam

View DS's profile


3521 posts in 3228 days

#4 posted 07-17-2017 03:41 PM

I ended up cleaning mine twice before getting satisfactory results.
Admittedly, I didn’t expect that much goop inside and just did a cursory cleaning of the nozzle area at first.

The fish-eyes were incredible. Had to dismantle the entire unit, clean and reassemble.
But hey, it works well and was incredibly inexpensive.

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics