Underseal/Cavity gun

[MetalMonkey]

I could do with a better solution for spraying coatings such as Dinitrol ML or 3125 inside subframe/box section.

The Sealey SG18 (or identical but more budget friendly clones) seem to be the one recommended.

Anybody got one? I'm assuming it is actually a pressure gun and not just a ludicrously expensive venturi unit.
Is there a better/cheaper option I'm missing or is this still the one to go for?
I need something with some sort of lance/tube for getting as far inside as possible.

 

[julianf]

Someone posted an Amazon deal for the Sealy one here only last week.

 

[gaz1]

heres an old thread with a homemade one

Thread 'cavity wax spray guns?'

Dec 2, 2017

https://www.ebay.co.uk/itm/Professi...hash=item1c4a55bdd3:m:mdGXo3sh8jm4ys76W0oR9sg

intrested in getting a gun like that , are they really £70 upwards ? doesnt seem great value , anyone seen a better deal? not intrested in the shutz gun can ones

• steveo3002
• Replies: 15
• forum: Paint, Metal Coatings and Media Blasting

 

[julianf]

I can't find the post, but here is a link -

https://www.amazon.co.uk/WilTec-Pressure-1100ml-4-6bar-Cavity/dp/B07NGP1BXL/ref=sr_1_17?crid=247S5Q2AF1LOJ&dib=eyJ2IjoiMSJ9.y0Hy7aLj8FOujV24mud3HpX98jgGfY3x3w8wKHrMlP9sjf64pVZWYsJWUhFF5KGJ89iIepfEauMoUqI64XkNkgdgqwCE-515jXRnNggCHdiO7jWzomwq_PczjQ3pyPmavn95iXimTc2m2JYzmX80yaEKJw3yx0mZj_SmIzpPaL0qNay-TzXkxLhozWPEUCt6nI_M9Im3kBkLXHhO7V9F2bNXZs6044ChJwEdoGUY2wzlpCNQaeNolBKFWKj5GJnFi5k2OOL6Tgb4UxabnrjTnyXFDl4FMVmO8I5IwczDJsnRIyk_387bmP_nDWz43CkkzIYFgO6Ny_rK3aDCkEYvDYJlY8JJKq_71zM26JZBjH6WUfRY_NTuR5cG1JhJEhuJKJweFI8tdOsYkxq-8qu2b7VD_xkCG2x-A-FS2x7F6IzhZye2Tax1ViR1A5ug6GzE.QCyxnGNRu19cJlfEsOuBb8DMC2u0GeAM8EglmW8PcWA&dib_tag=se&keywords=sealey+underseal+gun&qid=1740077877&sprefix=%2Caps%2C2799&sr=8-17

I think the deal that was posted recently was even better but I can't recall.

 

[Shedendman]

I can't find the post, but here is a link -

https://www.amazon.co.uk/WilTec-Pressure-1100ml-4-6bar-Cavity/dp/B07NGP1BXL/ref=sr_1_17?crid=247S5Q2AF1LOJ&dib=eyJ2IjoiMSJ9.y0Hy7aLj8FOujV24mud3HpX98jgGfY3x3w8wKHrMlP9sjf64pVZWYsJWUhFF5KGJ89iIepfEauMoUqI64XkNkgdgqwCE-515jXRnNggCHdiO7jWzomwq_PczjQ3pyPmavn95iXimTc2m2JYzmX80yaEKJw3yx0mZj_SmIzpPaL0qNay-TzXkxLhozWPEUCt6nI_M9Im3kBkLXHhO7V9F2bNXZs6044ChJwEdoGUY2wzlpCNQaeNolBKFWKj5GJnFi5k2OOL6Tgb4UxabnrjTnyXFDl4FMVmO8I5IwczDJsnRIyk_387bmP_nDWz43CkkzIYFgO6Ny_rK3aDCkEYvDYJlY8JJKq_71zM26JZBjH6WUfRY_NTuR5cG1JhJEhuJKJweFI8tdOsYkxq-8qu2b7VD_xkCG2x-A-FS2x7F6IzhZye2Tax1ViR1A5ug6GzE.QCyxnGNRu19cJlfEsOuBb8DMC2u0GeAM8EglmW8PcWA&dib_tag=se&keywords=sealey+underseal+gun&qid=1740077877&sprefix=%2Caps%2C2799&sr=8-17

I think the deal that was posted recently was even better but I can't recall.

That was me who put up that post

https://www.mig-welding.co.uk/forum/threads/underseal-gun.142184/

@MetalMonkey get one

 

[bricol]

I could do with a better solution for spraying coatings such as Dinitrol ML or 3125 inside subframe/box section.

The Sealey SG18 (or identical but more budget friendly clones) seem to be the one recommended.

Anybody got one? I'm assuming it is actually a pressure gun and not just a ludicrously expensive venturi unit.
Is there a better/cheaper option I'm missing or is this still the one to go for?
I need something with some sort of lance/tube for getting as far inside as possible.

I posted the Wiltec one as a separate thread a week or so ago. I have one. It's a thick walled pressurised pot. It's the easiest way to get coatings a long way down box sections with a long lance - the venturi ones simply won't blow it far enough.

Just watch that you full pull the trigger - pull it and the air comes on . . keep pulling back and the liquid starts - it is easy to only pull enough to get air only. I find it works well - just make sure you clear out the nozzle on the end of the flexible tube after use.

works well with underboxy wax with the metal lance too.

I paid 70 odd for mine 15-20 yrs ago - been worth every penny.