Flooring & installation supplies for contractors, builders & every projectVirginia · Washington, D.C. · Maryland · 703-929-8455
Jobsite Flooring
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Product specifications

Product type
Trowelable underlayment and patch
Size
50 lb bag
Current product name
Platform RC
Type
Rapid-setting cement screed and repair mortar
Compressive strength
Over 5,500 psi at 28 days (ASTM C109M)
Thickness
3/8 in. to 6 in. (extend 50% with pea gravel past 2 in.)
Mixing water
1.9–2.1 qt per 50 lb bag
Yield
About 0.37 cu. ft. neat; about 0.55 cu. ft. extended 50%
Light traffic
4–6 hours
Time to flooring
As early as 12–16 hours
Shelf life
6 months unopened
PrepPro · JF-11186

PrepPro Rapid Concrete Trowelable Underlayment & Patch 50 lb

50 lb bag · Floor prep & leveling

Fast-setting cement screed mortar (now sold as Platform RC) for ramping, trench fill and deeper concrete repairs, indoors or out. It mixes in a mortar mixer, holds slope well, can be extended with pea gravel and takes light traffic in about 4–6 hours.

What it’s used for

  • Ramping and resloping, including exterior balconies
  • Trench fill and deep concrete repairs
  • Interior and exterior screeds
  • Repairs before epoxy moisture coatings
  • Under tile, vinyl, carpet, wood and coatings
REGULAR PRICE$24.21 / bag

Contractors and builders get trade pricing with an account. See trade accounts

Sold individually, priced per bag.
Minimum order: 1.

Availability: Confirm before ordering

1 bag$24.21

Estimated lead time: 1–2 weeks. Delivery to Virginia, Washington, D.C., and Maryland. We’ll reach out with a quote that includes shipping after you request an order.

Delivery, cancellations & damage policy