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MB Stone Care MB-18 Ultra 5 Polishing Powder

MB Stone Care MB-18 Ultra 5 Polishing Powder for Marble & Calcite Stone

MB-18 Ultra 5 is a 5X concentrated wet-use polishing powder developed by MB Stone Professional for polished marble, travertine, limestone, and other calcite-based stones. Mixed with water into a slurry and worked with a hog's hair pad, it removes etch marks, light scratches, and wear patterns to restore a high-gloss finish. Coverage runs 125 to 200 sq ft per pound, and the powder is sold in 1 lb, 2 lb, 8 lb, and 25 lb sizes. It is a professional-use product: the stone must already be honed to a ready-to-polish state before MB-18 is applied.

Features

  • 5X concentrated formula reduces the powder volume and working time needed per section
  • Removes etch marks, light scratches and wear patterns to produce a high-gloss, mirror-like finish
  • Formulated for polished marble, travertine, limestone and other calcite-based stones
  • Wet application: mix with water into a slurry and work with a hog's hair or white pad
  • Coverage of 125 to 200 sq ft per pound (12-19 m² per 0.45 kg)
  • Countertop and floor procedures both published, including floor machine settings of 1.5 HP minimum and no more than 175 RPM
  • Packed by weight in 1 lb, 2 lb, 8 lb and 25 lb containers
  • Technical difficulty rating of 3 on the manufacturer's 1 (easy) to 5 (difficult) scale
Part NoSizeFormat
MB-18(5X)-11 lb (0.45 kg)Powder
MB-18(5X)-22 lb (0.91 kg)Powder
MB-18(5X)-88 lb (3.63 kg)Powder
MB-18(5X)-2525 lb (11.34 kg)Powder
  1. Clean the surface to be polished of all debris, sand and dirt, and mask off any adjacent surfaces that could be damaged by splatter.
  2. Complete the honing process first, to the highest clarity possible. The stone must be in a ready-to-polish state before MB-18 is used.
  3. Test on a small, inconspicuous area before full-scale application, and keep the product off surfaces it is not recommended for.
  4. Countertops: work in sections of about 3 to 4 sq ft. Sprinkle 1/2 teaspoon of powder in a circular pattern slightly smaller than the polishing pad.
  5. Countertops: mist with a spray bottle until the powder and the surrounding stone are soaked, set a variable-speed right-angle polisher to its slowest speed, and move a hog's hair pad slowly over the area under steady pressure.
  6. Countertops: check results after 2 to 3 minutes. Once a high polish is reached, semi-flush the section, pull the slurry down to the next section and repeat.
  7. Floors: work in sections of about 10 to 15 sq ft. Sprinkle roughly 1.5 to 2 oz (3 to 4 tablespoons) of powder in a circular pattern slightly smaller than the floor machine diameter.
  8. Floors: set a hog's hair pad on the powder with a full water tank, using a machine of 1.5 HP minimum and no more than 175 RPM. Release water and swing the machine back and forth to spread a thick, not overly wet, slurry.
  9. Floors: polish in a slow spiral motion end to end for 2.5 to 4 minutes, then check with a squeegee.
  10. Floors: release just enough fresh water to make the used slurry easy to vacuum, remove it with a wet vacuum, then clean with a neutral cleaner such as MB-1 Floor Amore or MB-15 Stone Glow before moving to the next section.
  11. Wear the recommended personal protective equipment and consult the Safety Data Sheet before use.
PropertyDetail
BrandMB Stone Care
Product Type5X concentrated stone polishing powder
Technical Rating3 on a scale of 1 (easy) to 5 (difficult)
Best Used OnPolished marble, travertine, limestone and other calcite-based stones
Application MethodWet
ApplicatorHog's hair or white pad (not included)
Coverage125 to 200 sq ft per pound (12-19 m² per 0.45 kg)
Floor Machine1.5 HP minimum, 175 RPM maximum
Countertop PolisherVariable-speed right-angle grinder/polisher at slowest speed
Available Sizes1 lb, 2 lb, 8 lb, 25 lb
Packaging BasisPacked by weight, not by volume
Intended UserProfessional use only
DeveloperMB Stone Professional®
How do I prepare the surface before polishing marble with MB-18?

Make sure the surface is clean and honed to the highest clarity possible. A deep-cleaning gel or abrasives can be used first if needed, and the surrounding area should be masked before polishing.

What kind of finish does MB-18 produce?

A high-gloss, polished finish.

How often can I use it on natural stone?

It can be used as needed to bring back a glossy sheen.

Can it remove deeper scratches?

No. MB-18 is a polish, not an abrasive. Deeper imperfections must be removed with diamond abrasives before the powder is applied.

Will it remove stains from natural stone?

No. Stains call for a dedicated product such as Stain Reaper or MB-2 Alkaline HD heavy-duty cleaner.

What precautions should I take?

Test the product in an inconspicuous area first, follow the label directions, wear the recommended personal protective equipment, and consult the Safety Data Sheet for safety information.

Which stones is MB-18 formulated for?

Polished marble, travertine, limestone and other calcite-based stones.

How much surface does one pound cover?

Between 125 and 200 sq ft per pound, depending on the stone and the technique used.

⚠ WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. Always wear appropriate PPE.