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350pc Ultra Precision High Temp Silicone Rubber Plug & Cap Kit Powder Coating Custom Paint Supplies

Free shipping on orders over $29.99

$24.95

$ 11 .99 $11.99

In Stock

About this item

  • Flexible, durable and reusable.
  • Withstands heat up to 600 degrees Fahrenheit/315 Celsius.
  • Color coded - easily grab the right size.
  • Premium quality silicone will not crack, shrink, harden or break.
  • Use for powder coating, painting, plating, anodizing, media blasting, etc.


This is a great kit for all of those precision jobs with small, hard to reach holes, studs, pipes, fittings, etc. You will receive 350 high temp rated plugs and caps to fit every hole or stud up to 3/8" in diameter, as pictured. Benefits of our premium silicone products include: Heat proof up to 600°F Color will never fade or bleed Flexible, durable and reusable Will not crack, shrink, harden or break Excellent for powder coating, painting, anodizing, media blasting, etc. 100’s of uses around the home, shop, classroom 100% satisfaction guaranteed or your money back Color may vary from photos.


John Pittman
2025-08-29 18:41:54
I like how dang stretchy these things are, though they still seem strong enough for any job you need it for. I’m only using the vacuum caps for now on my car under the hood because I took some emissions systems off and needed to cap some holes off. The largest green cap seemed WAY too small to fit over one of the holes, but I just put some soapy water on the piece and it slipped right on! It still had some room to stretch too so it doesn’t seem like it will fatigue or get ruined by heat any time soon. I also like how long the caps/plugs are cuz it really makes it easy to customize to whatever length you need. The only thing that isn’t ideal is the colors of these. It would be nice if they offered the same set except in black so it would look more professional under the hood, but I knew that going into this. No complaints!
Mike Stirewalt
2025-08-03 18:53:44
Very large selection of plug sizes and caps. Good material and should work for just about any need you have within the size range of the pack.
Jean Paul Lebeoff
2025-07-23 18:36:21
For incalculable different uses. Made of good quality silicone, I like em.
f8ldzz
2025-06-26 09:13:39
I primary used these things to plug hoses and fittings on automobiles.Yes, there are lots of plugs, but I wish the size variations was better.I find myself needing something in between the given sizes a lot - plugs are either too small or too large.
Shantel Stambaugh
2025-05-20 11:26:04
All good just wish it had some bigger sizes in the kit
bdeath
2025-05-14 14:03:41
good product. good use for covering the inlet on the bottom of air tools. also good for using to cover grease fills on the cars , ball joints and brake bleeders. these can go on further then the others go on to a certain point. where these can all the way.As well where they are high temp are good for painting as described.
zachary kingsbury
2025-04-26 13:54:05
I use these for action figure customization. They are brilliant for fitting in headsculpts, or other joints that are too big. They cut easily, and they're soft enough to not damage the balls, or pegs.
Plink
2025-04-22 11:04:19
I use these when painting, it's a little pricey, but works great and saves a lot of time from having to tape screws etc. I have not baked anything with it on, so don't know how it performs in the heat, but assumes it works well since designed for powder coating. Overall works as intended and save me a ton of time.
Albany Powder Coaters
2025-04-03 12:28:10
Powdercoating purposes
John Pittman
2025-03-25 11:40:37
I like how dang stretchy these things are, though they still seem strong enough for any job you need it for. I’m only using the vacuum caps for now on my car under the hood because I took some emissions systems off and needed to cap some holes off. The largest green cap seemed WAY too small to fit over one of the holes, but I just put some soapy water on the piece and it slipped right on! It still had some room to stretch too so it doesn’t seem like it will fatigue or get ruined by heat any time soon. I also like how long the caps/plugs are cuz it really makes it easy to customize to whatever length you need. The only thing that isn’t ideal is the colors of these. It would be nice if they offered the same set except in black so it would look more professional under the hood, but I knew that going into this. No complaints!
Mike Stirewalt
2025-03-15 16:56:05
Very large selection of plug sizes and caps. Good material and should work for just about any need you have within the size range of the pack.
Jean Paul Lebeoff
2025-03-13 16:01:24
For incalculable different uses. Made of good quality silicone, I like em.
f8ldzz
2025-03-12 16:34:23
I primary used these things to plug hoses and fittings on automobiles.Yes, there are lots of plugs, but I wish the size variations was better.I find myself needing something in between the given sizes a lot - plugs are either too small or too large.
Shantel Stambaugh
2025-03-05 11:16:39
All good just wish it had some bigger sizes in the kit
bdeath
2025-02-09 12:13:16
good product. good use for covering the inlet on the bottom of air tools. also good for using to cover grease fills on the cars , ball joints and brake bleeders. these can go on further then the others go on to a certain point. where these can all the way.As well where they are high temp are good for painting as described.
zachary kingsbury
2025-01-14 16:58:23
I use these for action figure customization. They are brilliant for fitting in headsculpts, or other joints that are too big. They cut easily, and they're soft enough to not damage the balls, or pegs.
Plink
2025-01-01 12:00:08
I use these when painting, it's a little pricey, but works great and saves a lot of time from having to tape screws etc. I have not baked anything with it on, so don't know how it performs in the heat, but assumes it works well since designed for powder coating. Overall works as intended and save me a ton of time.
Albany Powder Coaters
2024-12-04 11:56:00
Powdercoating purposes