Cement Blankets

Cement Blankets for Cold Weather Curing

Steel Guard Safety has been sewing industrial fabric in South Holland, Illinois for a hundred years, and our cement blankets are built the way a job site product should be: reinforced woven polyethylene skins, a bonded poly foam core, folded hems double stitched in UV resistant thread, and grommets set every 36 inches. Available in 3/16", 3/8", and 1/2" thickness, reaching R-values of 2.9, 3.5, and 5.7 respectively when laid over a frame.

Cement Blanket or Concrete Blanket?

Both terms describe the same product, and which one a contractor uses tends to come down to trade and region. Strictly speaking, cement is the binder and concrete is the finished mix, so the blanket is technically insulating concrete. In practice nobody on a job site draws that line, and you will hear cement blanket, cement curing blanket, and concrete blanket used for the same thing on the same pour. If you searched for one and landed here, you are in the right place.

Specifications

Skin Material: Woven Reinforced Polyethylene
Poly Thickness: 6 Mil, 8 Mil, and 12 Mil
Insulation: 3/16" and 1/2" Poly PE Foam, 3/8" Bubble Cell Layered Core
R-Value: R-2.9, R-3.5, or R-5.7 (with air pocket)
Sizes: 6' x 25', 12' x 20', 12' x 25' (finished sizes are slightly smaller than shown)
Quantity: 1
Colors: Black/Silver, Black, Orange

Cement blankets are not refundable.

* 1/2 in blankets are made to order. Current lead time 25 to 35 business days.

Built to Last

• Reinforced perimeter hems — folded and double stitched with UV resistant thread. This is the seam that fails first on a cheap blanket, and it is where we spend the extra labor.
• Industrial strength grommets — spaced every 36 inches, so you can hang the blanket vertically as a windbreak or tie it down flat without tearing out an edge.
• Hydrophobic foam core — the micro-foam does not waterlog, which means the blanket holds its insulating value through a wet season instead of losing it after the first soaking.
• Thermal range — R-2.9, R-3.5, and R-5.7, so you can match the blanket to the climate rather than buying one thickness and hoping.

Cold Weather Cement Work

Cement blankets protect against wind and cold, holding the heat of hydration in so the mix keeps gaining strength instead of stalling out overnight. Lay them flat over flatwork or hang them off a frame as vertical curtains to close in a work area. Framing the blanket rather than laying it directly on the surface creates an air pocket beneath, which is where the stated R-values come from.

The 3/16" and 3/8" ship from stock in 1 to 2 business days. The 1/2" is built to order in our own plant, so specify it early in the season rather than the week you need it on site.

Summer Pours and Wet Curing

Cold weather is not the only condition that needs a blanket. In summer heat, the problem is moisture leaving the mix too fast, which leads to surface cracking and a weak finish. For those pours, a wet cure blanket is the right product.

See our Poly Burlap Wet Cure Blankets — 10 oz burlap laminated to 5 mil white polyethylene, which holds water against the surface while reflecting UV. Sold in 10 by 100 foot rolls.

Ordering

Overlap blankets by at least 12 inches at the seams and carry coverage past the slab edge, since edges and corners lose heat fastest. For large slabs, ask about bulk pricing on the full curing blanket range.

Call 800-678-1900 Monday through Friday, 9 a.m. to 5 p.m. Central and our inside sales staff will help you size the order.