The Upholstery Forum

Hello I have a harbor freight 2.0


The gun isn’t spraying the glue it’s like making loogies.
What do I use to thin it out to spray ?
It says sprayable but it’s not spraying
Thank you kelly

Most cases your contact cement is aging. I do not use Weldwood so cannot comment. I have used Siphon Feed guns like that before and they spray fine for me until my contact cement thickens.

Cover the orifice with your finger and give it a few sprays, see if that doesn't help. The guy that apprenticed me taught me to do this, i guess it puts back pressure and unclogs the vent or orifice. It always works for me even if it has sat with glue in it for months.

Thank you adam12
It’s always sprayed this way with the new gun I guess it’s old glue.

I have been told that you can thin with acetone to revive old glue. Not done it myself but might be worth a try before you replacing the can.

I already have another can I will try the other can this weekend.
And use the old one for any brush work

Looks to be about the same quality gun as I use. I run about 60psi, and it works fine. If I need to cut the glue a bit thinner, I use a bit of Zylene. Zylene will clean a brush that has set up hard with glue.

Thank you i used the new can of glue eventually it worked good after getting the old glue out