DESCRIPTION
Ultraplan M20 Plus is a calcium-aluminate-based, quick-setting, self-leveling underlayment and topping. It is specially formulated for the resurfacing and construction of interior horizontal surfaces as a highcompressive-strength underlayment with maximum resistance to wheel tracking and indentations. Ultraplan M20 Plus is suitable for use as a commercial wear topping in warehouse and alternate industrial applications where an exceptional at and smooth concrete surface is desired.
FEATURES AND BENEFITS
- Very high compression strength for maximum durability
- Fast-setting and abrasion-resistant
- For use as an underlayment or decorative topping INDUSTRY STANDARDS AND APPROVALS
- Meets compression and atness requirements of ASTM F710, Standard Practice for Preparing Concrete Floors to Receive Resilient Flooring
- Meets compression and atness requirements of ASTM F2873, Standard Practice for the Installation of SelfLeveling Underlayment, and the Preparation of Surface to Receive Resilient Flooring
Green certifications
- Living Building Challenge (LBC) Red List Free: This product has been veri ed per the most current Red List on the LBC’s Website.
WHERE TO USE
- For leveling, smoothing and repairing of interior, residential and commercial floors before the installation of floor coverings
- For fast-track resurfacing and construction of horizontal wear surfaces
- For use over radiant-heated floors or to encapsulate hydronic or electric radiant-heated floors
LIMITATIONS
- Do not mix with other self-leveling underlayments.
- Do not install over unprimed surfaces.
- Do not install over flooring products, adhesive residue or substrates containing asbestos.
- Do not use for exterior applications. For interior use only.
- Do not apply Ultraplan M20 Plus unless the substrate temperature is maintained at between 50°F and 90°F (10°C and 32°C) for 48 hours before, during and after application. Do not allow freshly installed Ultraplan M20 Plus to freeze.
- If Ultraplan M20 Plus will be installed as a topping or nal wear layer, the substrate must be primed with an epoxy primer along with a sand broadcast to rejection. Ultraplan M20 Plus may be stained using traditional methods, but due to the nature of polymer-modi ed cementitious materials, one should expect variations in color, stainability and the general nish. MAPEI makes no representation about variations in color or consistency of nish.
- Do not install over standing water.
- Do not install over dimensionally unstable materials.
- Do not install if the maximum allowable deection of the supporting surface exceeds L/360 (or L/720 for installations involving natural stone or their agglomerates) when exposed to live or dead loads.
- Do not use in areas subjected to prolonged exposure to moisture. Contact MAPEI’s Technical Services Department for waterproong recommendations.
- Do not use as a moisture mitigation product. Cement-based self-leveling underlayments do not reduce moisture vapor transmissions emanating from high-humidity concrete slabs. If the ooring or installation system requires protection from elevated humidity levels, moisture mitigation must be done before Ultraplan M20 Plus is installed. Contact MAPEI’s Technical Services Department for recommendations regarding moisture mitigation.
SUITABLE SUBSTRATES
- Concrete that is installed in compliance with ASTM F710, that is at least 28 days old, and that is free from hydrostatic pressure, osmotic blistering and alkali silica reaction. Surface pro ling of concrete is not required if Ultraplan M20 Plus will be used as an underlayment and only be exposed to light or moderate traf c conditions. For high traffic, heavy rolling loads and maximum depth of ll conditions, an International Concrete Repair Institute (ICRI) concrete surface pro le (CSP) of #3 to #4 is required beneath the selected primer. For usage as a commercial wear topping, an ICRI CSP of #3 to #4 is required along with an epoxy primer with a sand broadcast. Alternatively, a textured primer may be used instead of mechanical pro ling. Make sure to follow all written instructions and guidelines found on the Technical Data Sheet and other related documentation for the selected primer.
- Well-bonded and dimensionally stable ceramic tile, porcelain tile, quarry tile, natural stone, vinyl composition tile (VCT), cement, epoxy-based moisture barriers and epoxy terrazzo
- Properly installed cement backer units
- Durable and fully cured cement-based mortar beds
- Engineer-approved plywood or oriented strand board (OSB) suboors with a maximum of 19.2" (48.77 cm) on center joist placement and that meets requirements of L/360
- Nailed-down wood ooring (including plank wood suboors, strip wood suboors and nailed-down solid wood ooring) that has been covered over with at least one layer of 5/8" (16 mm) plywood, glued and screwed ▪ Gypsum-based underlayments ™ ®
- Mapeheat Membrane, Mapeguard UM and similar crack-isolation and uncoupling membranes (these do not require priming)
SURFACE PREPARATION
- If Ultraplan M20 Plus will be installed as a topping or final wear layer, the substrate must be primed with an epoxy primer along with a sand broadcast to rejection.
- All substrates must be properly prepared, structurally sound, stable, solid, dry and primed with an appropriate MAPEI primer unless otherwise noted.
- On concrete substrates, fill in deep areas, holes and cracks with an appropriate MAPEI patching compound or screed. Fluid self-leveler may leak through to a floor below or other unwanted cavities.
- On plywood substrates, fill joints with an acrylic-based caulking compound to prevent the underlayment from leaking into a floor below.
Refer to MAPEI’s reference guide “Surface-preparation requirements for self-leveling underlayments” for details on proper surface preparation.
MIXING
Before product use, take appropriate safety precautions. Refer to the Safety Data Sheet for details.
- Based on the number of bags to be mixed, measure and pour the required amount of water (see “Mixing ratio” in the chart below) into a clean mixing vessel such as MAPEI Self-Leveling Mixing Barrel or a plastic pail that can hold at least 5 U.S. gals. (18.9 L). For best results, the water temperature should be at about room temperature (70°F or 21°C). The mixing ratio must remain consistent; do not overwater the mixture.
- Slowly add the powder into the pre-measured water, taking care to not generate excessive dust. Use a highspeed drill and an oval paddle mixer to mix Ultraplan M20 Plus to a homogenous, lump-free consistency.
- Continue to mix for 2 to 3 minutes. Do not overmix: Overmixing or moving the mixer up and down during the mixing process could trap air or cause pinholing during the application and curing process.
PRODUCT APPLICATION
Read all installation instructions thoroughly before installation. .
- Substrates and ambient room temperatures should be maintained at between 50°F and 85°F (10°C and 29°C) during application as well as for 3 days before and after application.
- Before product installation, close doors and windows, and turn off HVAC systems to prevent drafts during application and until the underlayment is cured. Protect installation areas from direct sunlight.
- Quickly pour or pump mixed self-leveling compound onto the surface in a ribbon pattern. Set the width of the pour at a distance that is ideal for maintaining a wet edge throughout placement. For best results, work as a team to provide a continuous ow of wet material, to avoid trapping air or creating a cold joint. Apply enough material to adequately cover all high spots.
- Shortly after placing Ultraplan M20 Plus, use a gauge rake to spread the material and assist in gauging it to the desired depth. After achieving the desired depth, use a smoother to obtain an even surface.
CURING
- Ultraplan M20 Plus is self-curing. Do not use a damp-curing method, or curing and sealing compounds.
- Cool-weather conditions may extend curing or setting times. Warmer weather conditions may accelerate working, curing and setting times.
CLEANUP
- Wash hands and tools with water promptly before the material hardens. Cured material must be mechanically removed.
PROTECTION
- Protect Ultraplan M20 Plus from direct sunlight, excessive heat and drafty conditions during curing. Turn off all forced ventilation and radiant heating systems, and protect the installation for up to 24 hours after completion.
- Avoid walking on the installed surface for at least 2 to 3 hours after installation, depending upon temperature and humidity conditions.
- Protect the installation from traf c, dirt and dust from other trades until Ultraplan M20 Plus is completely cured and nal ooring has been installed.
- Do not expose Ultraplan M20 Plus to rolling dynamic loads, such as fork lifts or scissor lifts, for at least 3 days after installation.
Product Performance Properties
at 73°F (23°F) and 50% relative humidity (RH)
| Laboratory Tests | Results |
| Cured density | 122 lbs. per cu. ft. (1.95 kg per L) |
| Wet density | 123 lbs. per cu. ft. (1.97 kg per L) |
| pH (of wet mixture) | 11 |
| VOC content | 0 g per L |
| Compressive strength – ASTM C109 Modifed | |
| 7 days | > 3,150 psi (21.7 MPa) |
| 28 days | > 5,000 psi (34.5 MPa) |
| Flexural strength – ASTM C348 (CAN/CSA-A23.2-8C) | |
| 28 days |
> 1,070 psi (7.38 MPa) |
| Pull-out strength – ASTM C1583 |
> 450 psi (3.10 MPa) |
Shelf Life and Product Characteristics
before mixing
| Shelf life | 1 year in original, unopened packaging stored at 73°F (23°C) and 50% RH |
| Physical state | Powder |
| Color | Gray |
Protect containers from freezing in transit and storage. Provide for heated storage on site and deliver all materials at least 24 hours before work begins.
Application Properties
| Application temperature range | 50°F to 85°F (10°C to 29°C) |
| Mixing ratio | 5.5 to 5.8 U.S. qts. (5.20 to 5.49 L) of water per 50 lbs. (22.7 kg) of powder |
| Mixing time | 2 to 3 minutes |
| Flow time | Up to 15 minutes |
| Single-lift application range | 1/8" to 2" (3 mm to 5 cm) |
| Minimum thickness over highest point in floor | 1/16" (1.5 mm) |
| Waiting time for secondary applications of primer and self-leveling compounds | 24 hours |
| Drying time before installation of non-moisturesensitive floor coverings at 70°F (21°C) at 1" (2.5 cm) thickness | 3 hours |
| Drying time before installation of moisturesensitive floor coverings at 70°F (21°C) at 1" (2.5 cm) | 16 to 24 hours |
CSI Division Classification
| Cast Underlayment | 03 54 00 |
Packaging Size Bag: 50 lbs. (22.7 kg)
Approximate Coverage*
per 50 lbs. (22.7 kg)
| Thickness | Coverage |
| 1/4" (6 mm) | 24 sq. ft. (2.23 m ) |
| 1/2" (12 mm) | 12 sq. ft. (1.11 m ) |
| 3/4" (19 mm) | 9 sq. ft. (0.84 m |
| 1" (2.5 cm) | 6 sq. ft. (0.56 m ) |
| 1.5" (3.8 cm) | 4 sq. ft. (0.37 m |
* Coverage shown is for estimating purposes only. Actual jobsite coverage may vary according to substrate conditions, type of equipment, thickness applied, and application methods used.
RELATED DOCUMENTS
- Reference guide: “Surface-preparation requirements for self-leveling underlayments”**
- Product selection guide: “Primers for self-leveling materials”**
** At www.mapei.com
ADDITIONAL INFORMATION
Refer to the Safety Data Sheet (SDS) for specific data related to health and safety as well as product handling.
For information on MAPEI’s commitment to sustainability and transparency, as well as how MAPEI products may contribute to green building standards and certi cation systems, contact sustainability-durabilite@mapei.com.
WARNING
The test results shown in the TECHNICAL DATA table were obtained in compliance with test methods and curing cycles, if applicable, dened in the industry standards referenced on the Technical Data Sheet. Please note that the use of test procedures or methods other than those indicated in the table could lead to different values and that, in such cases, any liability of our company is excluded.
DATA SHEET DOWNLOADS