Reddit’s Top Questions About Welding Blankets Answered: FAQs and Tips

Q: I am currently using a piece of raw leather that my uncle gave me. I soak it and put it over whatever I want to protect. It generally gets the job done but it’s cut in a weird shape and I just really need an actual blanket.
I’ve been reading a lot of hit or miss reviews on Amazon listings. I really don’t care about a little bit of shedding, but what I do care about is the blanket not melting when some slag hits it. I’d like to stay as cheap as possible but I also understand that you get what you pay for. I’d like to have maybe a single 4’x6′, or two slightly smaller sizes. I don’t do a ton of welding but when I do, it would be nice to have one or two.
Any recommendations?

A: This is a common question, especially if you’re not familiar with welding blankets. Here are some tips from SUNTEX on how to choose the right one:
1. Check Your Welding Duty: Determine if your work is light, medium, or heavy duty. Choose a thicker blanket if you have a lot of sparks and slag.
2. Size Matters: Pick a size based on your project. It’s good to follow the 1.2x rule, which means choosing a blanket that is 1.2 times larger than the area you want to protect.
3. Material Choice: You mentioned using leather, but remember that leather is flammable. Fiberglass or silica fabric is fire-resistant. If safety is a top priority, go for a fiberglass or silica blanket.
4. Look for Recommendations: Check out SUNTEX’s welding blanket category or read Top 5 Welding Blankets You Must Know (Fireproof, Heat-Rated, Durable)

Q: On Friday, over an hour after we left the jobsite a welding blanket began smoldering and reportedly even supported flames. This was one of the carbon fiber thermofelt types. It had been quite windy all day. In talking with my superintendent, this same thing happened about two years ago on one of our other sites with these blankets but just smoldering without flames about two hours after hot work was done. (hot work cool down times were performed and observed both times) Ever hear of this happening?
So now I’m looking at options. Anyone ever use the bronze silica blankets? They’re supposed to be heavy-duty for use on horizontal surfaces and molten metal. Do they shed fibers like fiberglass? Often we need to be snuggled tight against the blankets to perform our work. Thanks for any help or suggestions you can make for blanket types.

A: Sure, this can happen with carbon-fiber thermofelt welding blankets, and your experience isn’t as unusual as it sounds. Although these blankets feel soft, skin-friendly, and flexible, the material is essentially a high-temperature carbonized synthetic fiber — and it is still a combustible material. Under the right conditions of residual heat, oxygen flow, and trapped sparks (especially on a windy day), carbon felt can continue to smolder long after the hot work is finished. In some cases, it can even flare up, exactly like what you observed.

If your welding work produces heavy sparks, molten spatter, or prolonged radiant heat, it’s safer to use fiberglass or silica-based welding blankets, which are inherently non-combustible and much more stable under continuous heat exposure.
If comfort is a concern. For example, when welders need to work tightly against the blanket, consider using silicone-coated fiberglass/silica blankets. The coating reduces itch, improves flexibility, prevents fiber shedding, and adds extra resistance to molten metal. This gives you far better fire protection than carbon felt while still being comfortable enough for close-contact work.

Q: I have a small (2′ x 3″) welding cart that has a sheet metal shroud on 3 sides. On the open side, sparks and weld slag can come out and drop the 35″ or so onto the floor. MIG, TIG, and Oxy welding, only. The problem is that the floor in my garage is covered with Plastic (RaceDeck) tiles and the sparks/splatter melt into the tiles. Not concerned about fire, it just makes the tiles look like crap. So I am looking for a Welding Blanket that I can put on the floor on the open side of the weld cart, just when I am actually welding. Something like a 4′ x 6′ blanket. I will be walking on this blanket when welding so it has to stand up to some light foot traffic, but only for the few times a year that I actually do any welding.

I am going to guess that Fiberglass and Felt materials are “out” due to the walking. So that leaves Silicone coated fiberglass and cowhide, I think.

Any thoughts or recommendations on what to use?

A: Based on the description, your welding blanket really needs to solve two problems:
catch sparks and hot slag without burning through, and
handle light foot traffic with good traction and easy cleanup.
For this kind of application, a silica-fabric welding blanket coated with silicone rubber is an ideal choice. The silica base cloth handles extreme heat (over 1000 °C), easily stopping MIG/TIG/oxy slag from damaging your RaceDeck tiles. The silicone coating adds a lot of practical benefits — anti-slip, abrasion resistance, oil and dirt resistance, plus a soft, flexible surface that holds up well when walked on. Silicone rubber itself tolerates temperatures above 250 °C, so the coating won’t degrade during typical welding tasks.
A blanket made from SUNTEX-1160 fits your needs perfectly. It provides high-temperature protection, durability for occasional foot traffic, and a surface that’s easy to clean after welding.

Q: I work for a company where we do a lot of welding in residential places and near finished interiors (sometimes home people already live in). My boss has these horrible fiberglass blankets that we use all the time. I am painfully itchy after a day of using them and I’m curious what other people use? Or should I just prepare for a life of itchiness?

A: It’s common to feel itchy from fiberglass welding blankets, especially if they have no coating. Some low-quality silicone-coated blankets may still let fiberglass escape, causing irritation.

Here are some suggestions:

1. Choose Heavy Silicone Coated Blankets: These have a strong silicone layer that keeps the fiberglass in place and prevents it from getting on your skin. for example: silicone coated fiberglass welding blanket, Suntex-1155.
2. Consider Leather or Carbon Fiber Blankets: If your welding work doesn’t require high fire ratings or doesn’t produce a lot of hot slag, these materials can be more comfortable and won’t irritate your skin.

Q: Hey guys,
I am looking for a welding blanket to place over a plasma table that will not allow smoke to pass through. We have a dust collector to collect and filter the smoke but when there are enough holes in the plate we are cutting the ductwork loses its pressure and some of the smoke escapes. What material or type of welding blanket would work best for this application?
Looking on the internet mostly suggested blankets that were used for Smokers. I assume those are to maintain a temperature and not necessarily contain the smoke.
Thanks for any advice!

A: That’s a great question! If you need a welding blanket that blocks smoke, you’ll want to choose a material that provides airtightness. Most standard welding blankets either have no coating or just a basic acrylic or PU coating. While some have high-temperature coatings (like graphite or vermiculite), only silicone rubber coating can seal the tiny holes in fiberglass fabric effectively, ensuring complete airtightness.

Here are some recommendations based on smoke levels:
1. Lightweight Silicone Coated Blanket: If the temperatures aren’t very high, consider a lightweight silicone coating blanket, like the Suntex-1174.
2. Heavy Duty Option: For more complex conditions or higher temperatures, go with a heavy-duty silicone-coated fiberglass blanket, such as the Suntex-1155. You may also consider a silica welding blanket, like the Suntex-1160, for added protection.