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Grouts & Grout Sealers

StatisticsReview of Green Building Supply

StarQuartz, QuartzLock2 Urethane Grout


Revolutionary pre-mixed, self-sealing, stain-free grout

QuartzLock2 Urethane Grout is a next-generation eco-friendly grout technology that makes grouting tile easier, safer and more long lasting. Made with a ultra-low odor non-toxic urethane, QuartzLock2 comes pre-mixed and ready-to-use in either a 9 lb. or 18 lb. bucket. Use it on all ceramic, porcelain and natural stone tile indoors or outdoors and even in submerged applications. Once applied, the grout cures to a very hard, self-sealed, semi-elastic finish which results in a colorfast grout that's resistant to chemicals, stains, mold and mildew. Plus, QuartzLock2 won't shrink or crack.

NOTE: NEW QuartzLock2™ RapidCure™ will replace all regular QuartzLock2 as old stock is depleted. Because this will occur through 2014, you may receive the new RapidCure formula when you order QuartzLock2. If so, please refer to installation guidelines shown in right hand margin. QuartzLock2 RapidCure differs only in that it is approved for intermittent water exposure after only 3 days of cure (instead of 7 days as before) and full water submersion after 7 days of cure. The coverage remains the same for both products.

NOTE2: In rare instances, your tile may require special cleaning to remove the grout haze. QuartzLock2 offers a proprietary cleaner for this called Blaze. We strongly encourage you to test QuartzLock2 on one tile first before using everywhere.

QuartzLock2 Urethane Grout is a great replacement/upgrade to epoxy, cement and pigment-based grouts. Unlike epoxy grout, it's both easy to apply and clean up; unlike pigment-based grout, there's no risk of incorrect mixing. The real bonus, however, is that QuartzLock grout never has to be sealed!

QuartzLock2 can be used for indoor or outdoor, commercial or residential, wet or dry and horizontal or vertical applications. It requires no water and it won't sag in vertical applications and won't dust. It's UV stable and non-allergenic; plus leftover grout can be saved for later use instead of being thrown in the dump.

This is an encapsulated product in which the sand component (crystalline silica) is bound in a polymer matrix. The sand contained in QuartzLock2 cannot be inhaled under conditions of intended product use.

How much do you need? See the coverage chart on page 4 of this guide.
On the Installation and Coverage Chart, the 9 lb. unit corresponds to the 1-gallon size; the 18 lb. unit corresponds to the 2-gallon size.

For glass and metal tile, we recommend the use of StarGlass Grout, also by StarQuartz.

Why we like it

Forget dirty stained grout lines. Forget mold and mildew. Forget sealing your grout. One application and you are done forever. If you've ever used an epoxy grout, you know how hard it is to apply and clean up. This innovative non-staining grout removes all the pain and adds some great features. Contractors love this and you will too.

Features & benefits

  • High-performance — semi-flexible, non-sag, crack-resistant, low shrinkage, covers 1/16" to 1/2" grout lines
  • Fast, easy installation — installs up to 50% faster than other grouts
  • Superior durable finish — non-fading, self-sealing, stain-resistant
  • Long open time — sets up after four hours so there is no rush
  • Easy-to-use — DIY; pre-mixed, water cleanup
  • Great colors — 40 quartz-based colors; non-fading, UV stable
  • Non-toxic — no BPA or NMP as found in epoxy grouts; low odor, ultra low VOC
  • Safe — for everyone, including the chemically sensitive; learn how to test a non-toxic product for tolerance
  • Eco-friendly — ultra low VOC; contains recycled content

Alert: Warning! Do not use vinegar or acid-based cleaners as they will weaken the grout during the curing process.

State Nexus Fee may apply
A state nexus fee will be applied to this item if drop shipped to the following states: Alabama, Alaska, Arizona, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Louisiana, Maine, Maryland, Massachusetts, Mississippi, Missouri, Montana, New Hampshire, New Jersey, New Mexico, New York, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, Wisconsin. We're sorry for the inconvenience. Click here to read more about the state nexus fee.

This item description was written by Joel Hirshberg


Residential Finish Wear
Residential Structural
Commercial Finish Wear
Commercial Structural
Forest Stewardship Council (FSC) 
FSC Content
FSC Chain-of-Custody #
LEED® Qualifications 
LEED® Regional Materials Zip Code
Interior or ExteriorInterior, Exterior
Use On MaterialTile, Tile: Ceramic, Tile: Glass, Tile: Natural Stone, Tile: Porcelain
Use OnQuartzLock Grout can be used in grout joint widths from 1/16” to 1/2” on vertical or horizontal surfaces in both interior and exterior installations.
LocationAll Rooms
Eco-replacement forEpoxy Grout
Chemically-sensitive safeYes learn how to test a non-toxic product for tolerance
Test before useYes, test on inconspicuous area
CoverageDepends on tile size and joint width - dowload chart
Square Feet / Box Square Feet
Thickness or Height"
Veneer Cut Thickness
Boxes / Pallet Boxes
Square Feet / Pallet Square Feet
Boards / Box Boards
Pieces / Box Pieces
Weight / Box Pounds
Minimum Order
Old Name
Recycled Content50-59%
Shelf Life 
Use With These Prodcuts
Number of Colors Colors
Carpet Pattern
Coordinating Border
Critical Radiant Flux
Extractable Matter
Face or Pile Weight
General Flammability
Surface Flammability
GSA Classification
Machine Guage
Moth Resistance
Pattern Repeat
Pile Height (High)
Pile Height (Low)
Primary Backing
Resistance to Insect Pests
Roll Length '
Secondary Backing
Smoke Density
Stitches Per Inch
Surface Texture, Construction, Style
Total Height
Total Weight
Traffic Rating
Tufts per Sq. In. Tufts / Sq In
Yarn Construction
Bundles per Pallet Bundles
Bundles per Square 6" Exposure Bundles
Bundles per Square 7" Exposure Bundles
Bundles per Square 7-1/2" Exposure Bundles
Bundles per Square 8" Exposure Bundles
Pounds per Bundle Pounds
Pounds per Pallet Pounds
Pounds per Roll Pounds
Pounds per Square Pounds
Pounds per Square 6" Exposure Pounds
Pounds per Square 7" Exposure Pounds
Pounds per Square 7-1/2" Exposure Pounds
Pounds per Square 8" Exposure Pounds
Lin Feet per Bundle Lin Feet
Lin Feet per Pallet Lin Feet
Rolls per Pallet Rolls
Squares per Roll Squares
Tiles per bundle Tiles
Tiles per Lin Foot Tiles
Finish Type 
Ingredientsdownload Material Safety Data Sheet (MSDS)
VOC Content38 g/l Grams/Liter
Use On Material - ConditionTile, Tile: Ceramic, Tile: Glass, Tile: Natural Stone, Tile: Porcelain
Application Methodfloat, sponge, trowel
Application Temperature Rangewarmer than 55 ° f
Application Instructionssee pdf
Surface or Product PreperationSurface should be clean, dry and oil free
Recommended # of Coats1
Re-coat Afteras needed
Drying Timeopen time 4 hours, tack free in 8 hours, foot traffic in 24-48 hours, fully cures in 72 hours. Use accelerator in wet or dry applications to speed up cure time
Appearance When Drysatin finish
Cleans Up WithWater, neutral cleaners
StorageStore in cool dry place out of sunlight
Recycling or DisposalDispose of excess product in accordance with all local, state and federal regulations, Do not throw out container unless completely empty. Pour contents onto dry cardboard and let thoroughly dry outdoors. May also be absorbed with cat litter, sand or other dry materials
Bamboo Construction 
Bathroom Installation
Color Change
Construction Description
Finish Sheen 
Floor Item Type
Floor Pattern
Floor Type 
Grade Installation 
Janka Hardness Rating
Joint System
Number of Plys  -Plys
Radiant Heat 
Range of Resistance
Risk in Dry Climates 
Shade (1 Light) - (7 Dark) 
Strips / Plank  -Strips/Plank
Surface Texture 
Surface Treatment 
Surface Treatment Color
Tile Application 
Touch Up Kit
Can be indoor?
Can be outdoor?
Direct Vent?
Energy Factor
Max Gallons Per Minute - GPM
Max BTU's / Hour - BTU's / Hour
Multi Control Capabilities
Temperature Range (with remote)
Life Hrs
Input Wattage W
Delivered Lumens lm
Efficacy lm/W
Color Temperature K
Color Rendering Index (CRI)
Equivalent Wattage W
Additional Information
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Main Item

StarQuartz, QuartzLock2 Urethane Grout

Pre-mixed self-sealing grout that's non-toxic, colorfast, stain-proof, water-proof and crack-resistant (new colors)

StarQuartz, QuartzLock2 Urethane Grout

Item #16647
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$93.56 – $160.83