Thermal Insulated Tarps, Built in the USA
A thermal tarp is two layers of heavy vinyl with a foam core sewn between them. Ours use 10 oz coated vinyl front and back over closed cell foam, in 1/4 inch or 1/2 inch thickness, with 2 inch double lock stitched hems and grommets set on all four corners and every 2 feet on center around the full perimeter.
These are dense and they are heavy, and that is the point. A thermal tarp that holds a stable temperature has to have enough mass to do it, and it has to survive being dragged, tied down, and left out through wind. Made in the USA, and built to come back for a second season.
1/4 Inch or 1/2 Inch
Both thicknesses use the same vinyl skins and the same construction. The difference is the foam core and what it costs you in weight and money.
- 1/4 inch closed cell foam — the working choice for most equipment covers, short term enclosures, and anywhere the tarp gets folded and stored between uses. Lighter to handle, easier to store, lower price at every size.
- 1/2 inch closed cell foam — the choice for sustained cold, overnight ground cover, or anywhere the tarp is the only thing between your work and the weather. Noticeably heavier, and worth it when the temperature swing is the whole problem.
Select thickness alongside size and color above. Pricing updates with your selection.
Why We Do Not Publish an R-Value
You will see R-values on poly skin insulated tarps and curing blankets, and you will not see one here. The reason is that R-value on a tarp depends on an air pocket forming underneath it, which is a function of how you frame and deploy it rather than a property of the material. Our poly line is rated because it is sold for concrete curing, where the framed setup is standard and the number means something.
These vinyl tarps get used flat, hung vertically, wrapped around equipment, and laid over irregular loads. Publishing a single number for all of that would be misleading. What we can tell you is the foam thickness, the skin weight, and the construction, which is what actually determines how the tarp performs in your application. If you need a stated R-value for a submittal, use the poly line instead.
Specifications
Skin Material: 10 oz Coated Vinyl, front and back
Insulation: 1/4" or 1/2" thick closed cell foam
Grommets: Set on corners and every 2 feet on center on all sides
Hems: 2 inch double lock stitched
R-Value: Not rated (see above)
Stock Sizes: 5x10, 5x15, 5x20, 5x25, 5x30, 10x10, 10x15, 10x20, 10x25, 10x30, 15x20, 20x20
Colors: Blue, Black, Gray, White, Red
Note on sizing: Finished sizes run 5 to 6 inches smaller on the width than the nominal size
Usually ships in 10 to 15 business days.
What These Get Used For
- Equipment and machinery covers — holds a stable temperature around hydraulics, pumps, compressors, and generators through hard temperature swings in either direction
- Ground cover and frost protection — laid over subgrade overnight to hold ground heat and keep frost from setting in
- Winter enclosures — hung off scaffolding or a frame to close in a work area and keep heaters doing something useful
- Load and material protection — waterproof vinyl on both faces keeps stored material dry while the foam moderates temperature underneath
- Concrete curing — works well over a pour, though if curing is the main job the poly curing blankets are purpose built for it
Custom Sizes
Twelve stock sizes cover most jobs, but anything we sew we can sew to your dimensions, in any of the five colors. Send us the finished size you need and we will quote it. Measure the opening or the load you need to cover and give us that number, since finished sizes run 5 to 6 inches narrower than nominal once the tarp is hemmed and grommeted.
Vinyl or Poly?
We stock two families of insulated cover, and the right one depends on the work. Vinyl and closed cell foam, which is this page, is the heavier and more abrasion resistant build, meant to be handled repeatedly. Woven poly over foam is lighter, faster to spread across a large area, less expensive per square foot, and R-rated for curing work.
Compare both families on our insulated tarps page.
Questions on Sizing or Color
Call 800-678-1900 Monday through Friday, 9 a.m. to 5 p.m. Central. Our inside sales staff works with these products and can tell you which thickness fits your application.
INSULATED TARPS
| SIZES L x W (FT) | 5 x 10 5 x 15 5 x 20 5 x 25 5 x 30 10 x 10 10 x 15 10 x 20 10 x 25 10 x 30 15 x 20 20 x20 |
| COLORS | Black, Gray, Blue, Red, White, Green |
| BRAND | Steel Guard Safety |
| SKIN MATERIAL | 10 oz Coated Vinyl |
| INSULATION | 1/4" Thick Closed Cell Foam Insulation |
| R - VALUE | Untested |
| GROMMETS | On Perimeter, All Sides Every 24" & Corners |
| DETAILS | Made to Order in the USA |
More Info on Quick Ship Concrete Curing Blankets from Steel Guard Safety More Info on Insulated Tarps from Steel Guard Safety
Thermal Tarp FAQs
What is a thermal tarp?
A thermal tarp is a cover with a foam core sewn between two waterproof skins. The skins block wind and water, the foam slows heat transfer. It works in both directions, so the same tarp that holds warmth in around a pour will also keep equipment from overheating in the sun. Ours use 10 oz coated vinyl on both faces over closed cell foam.
Should I get 1/4 inch or 1/2 inch foam?
The 1/4 inch handles most equipment covers and short term enclosures, and it is easier to fold, carry, and store. The 1/2 inch is for sustained cold, overnight ground cover, or anywhere the tarp is doing all the work. If you are moving the tarp daily, the weight difference matters more than you would expect. If it goes down and stays down, take the thicker one.
Why is there no R-value listed?
R-value on a tarp depends on an air pocket forming beneath it, which comes from how you frame and deploy it rather than from the material itself. These get used flat, hung vertical, and wrapped around equipment, and one number could not honestly describe all of that. Our poly curing blankets are rated because they are sold for framed concrete curing, where the setup is standard. If you need a stated R-value for a submittal, use the poly line.
Are thermal tarps waterproof?
The vinyl skins are waterproof on both faces. Water does not pass through the fabric. Seams and grommet holes are stitched rather than heat sealed, so on a tarp laid flat with standing water on it, some seepage at the stitch line over time is normal. Pitch it or frame it so water runs off.
Can I get a custom size?
Yes, in any of the five colors. Give us the finished size you need and we will quote it. Measure the opening or the load you are covering and give us that number rather than the tarp size you think you need, since finished sizes run 5 to 6 inches narrower than nominal once hemmed and grommeted.
Why is the finished size smaller than the size I ordered?
Hemming and grommeting consumes material at the edges. A 10 by 20 foot tarp is cut at 10 by 20 and finishes 5 to 6 inches narrower on the width once the hems are folded and stitched. This is normal on any hemmed tarp and worth accounting for when you measure.
How do I attach one?
Grommets are set on all four corners and every 2 feet on center around the perimeter, so you have plenty of tie points. For a vertical hang off a frame, run a continuous line through the top grommets rather than tying at each point individually. For a flat tie down in wind, use every other grommet at minimum. Wind damage on a loose tarp is the fastest way to ruin one.
Can I use a thermal tarp for concrete curing?
Yes, and many contractors do. The vinyl build holds up better to repeated handling than a curing blanket does. If concrete curing is the primary job, though, the poly curing blankets are purpose built for it, carry stated R-values, and cost less per square foot.
How long do they last?
Double lock stitched hems and coated vinyl skins are what carry these through multiple seasons. What shortens their life is dragging across abrasive surfaces, folding and storing while wet, and leaving one loose to flap in the wind. Tie it down and let it dry before it goes back on the shelf.
How fast do they ship?
These are built to order and usually ship in 10 to 15 business days. Custom sizes take longer and we will confirm a date when we quote. If you need insulation on site faster than that, the poly line ships in 1 to 2 business days.
Why Buy From Us
![]() |
We Put Our Customers First to us. If it doesn't fit, it breaks, you've changed your mind or for no reason whatsoever simply send it back to us and we'll cheerfully refund you every cent. |
![]() |
Returns are easy, simply contact us for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap! |
![]() |
In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down. |
![]() |
We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again. |
![]() |
Ordering from Strong Arm is 100% safe and secure so you can rest easy. Your personal details are never shared, sold or rented to anyone either. |




