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

Product specifications

Brand
Platform
Product type
Self-leveling underlayment
Size
50 lb bag
Base
Polymer-modified portland cement (Synthecem technology)
Thickness
1/8 in. to 2 in. neat in one lift; up to 3 in. in isolated areas
Mixing water
4.5–5 qt per 50 lb bag
Foot traffic
3–4 hours
Construction traffic
After 12–16 hours
Time to flooring
Breathable: 16 h (up to 1 in.); non-breathable: 24 h (at 1/2 in.)
Primer
Platform P360
Over wood
Two coats P360 plus lath; deflection L/720
Platform Self-Leveler · JF-11180

Platform L3 Self-Leveling Underlayment 50 lb

50 lb bag · Floor prep & leveling

High-flow, high-strength portland-cement self-leveling underlayment for floors that must be very flat, such as under large tile or wide plank. It pours from 1/8 in. to over 2 in. in one lift, gives a long placement time and dries to a hard surface that resists wheel tracking.

What it’s used for

  • Flat floors for flatness-sensitive flooring
  • Residential, commercial and institutional renovations
  • Over concrete, sound gypsum, steel deck, terrazzo and well-bonded VCT or tile
  • Over electric or hydronic radiant heat
  • Under vinyl, LVT, carpet, engineered wood and tile
REGULAR PRICE$31.39 / 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$31.39

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