QC Solvent Seal 27 and QC Solvent Seal 18
Product Information Bulletin 18.402

Uses and Benefits

  • QC Canada offers two high-quality solvent-based sealers: QC SOLVENT SEAL 27 and QC SOLVENT SEAL 18.

  • QC’s solvent-based acrylic sealers provide deep gloss finishes on both interior and exterior concrete, as well as terrazzo, brick and masonry surfaces.

  • QC SOLVENT-BASED SEALERS are excellent choices for sealing and enhancing the following surfaces:

  • Coloured, imprinted concrete

  • Coloured concrete that has been uncoated or stripped

  •  Acid-stained or colour-hardened concrete that has been uncoated or stripped

  • Uncoloured concrete that has been uncoated or stripped

  • Interior high-traffic retail or public areas

  • Interior concrete surfaces that will be regularly maintained and recoated

  • Exterior concrete surfaces that will weather naturally

  • Exposed aggregate

  • These sealers protect surfaces against dusting, staining and dirt with nonyellowing finishes.

  • When applied according to directions, these sealers will deepen and enhance the colour of concrete, terrazzo or masonry surfaces.

  • The sealers enrich the tone of concrete coloured with QC COLOUR HARDENER as well as accentuate the surface character of concrete treated with QC PATINA STAIN . Tinted QC SOLVENT-BASED SEALERS are not meant to be the primary colouring system. Any one of these tinted sealers should be used with another QC concrete colouring product.

QC Solvent Seal 27—Applicable Standards

QC SOLVENT SEAL 27 complies with the following regulations and requirements:

  • QC SOLVENT SEAL 27 may be used in San Diego County and in many other California counties. The VOC content in this sealer complies with VOC content regulations in the San Diego Air Quality Management District. Before use, consult local and state regulations, the United States EPA, or QC CONSTRUCTION PRODUCTS to determine if this product complies with VOC regulations in your area. (See contact information for QC CONSTRUCTION PRODUCTS at the end of this bulletin.)

  • ASTM D 2047 – exceeds slip-resistance requirements

  • ASTM D 2801 for leveling

  • ASTM D 3153 for recoatability

  • ASTM D 523 for gloss

QC Solvent Seal 18—Applicable Standards

QC SOLVENT SEAL 18 complies with all VOC content regulations, except for California VOC regulations. Before use, consult local and state regulations, the Environmental Protection Agency, or QC CONSTRUCTION PRODUCTS to determine if this product complies with VOC regulations in your area.

  • ASTM D 2047 – exceeds slip-resistance requirements

  • ASTM D 2801 for leveling

  • ASTM D 3153 for recoatability

  • ASTM D 523 for gloss

Before Any Application for All QC Solvent-based Sealers

1. When using any of these solvent-based sealers, your surface must be clean and completely dry before application. If your surface is not clean or completely dry, the sealer may turn white or hazy, or the sealer may fail to form a proper film.

2. Before applying product to new or existing concrete, test your QC SOLVENT- BASED SEALER in an inconspicuous area for desired results. If in doubt about application, contact QC CONSTRUCTION PRODUCTS.

Application to New Concrete for All QC Solvent-based Sealers

1. Warning: Do not apply QC SOLVENT-BASED SEALERS to fresh concrete.  These sealers are not curing compounds. Allow at least 14 days for concrete to cure or wait until the concrete has reached a uniform colour. For optimum results, allow concrete to cure for 28 days or longer.

2. Because of their high-solids content, QC SOLVENT-BASED SEALERS are best applied with an airless sprayer. For smooth-troweled concrete, a lambswool applicator may be used. For rough surfaces or for textured concrete, a pump-up sprayer or an airless sprayer may be used. For small areas, a short-nap roller may be used. Apply the sealer uniformly and maintain a wet edge to avoid roller marks.

3. Important: When applying a QC SOLVENT-BASED SEALER, do not allow the sealer to puddle. Apply the sealer as uniformly as possible, without leaving either spaces or puddles. Thin applications will give better results than one single, heavy application.

4. Two light coats of QC SOLVENT-BASED SEALER at the recommended coverage rates are usually sufficient to seal and protect. However, if you want increased gloss, durability and extra protection, apply additional coats after initial coats are dry.

Application to Existing or Old Concrete for All QC Solvent-based Sealers

1. Surface must be thoroughly cleaned, rinsed and allowed to dry. To clean surface, use one part QC CONCRETE DEGREASER to eight parts water. On smooth surfaces, scrub in with automatic scrubber or use a low-speed buffer equipped with scrubbing pads or brushes. After scrubbing surface, use a mop and ringer bucket with clean water to rinse the surface of remaining residue. On rough surfaces or textured concrete, use the same equipment as with smooth surfaces but rinse with pressure-washer.

2. If applying sealer to existing concrete, paint or other coating, test prior to application in an inconspicuous area to ensure compatibility. If in doubt about surface of existing concrete, contact QC CONSTRUCTION PRODUCTS.

3. After cleaning and testing surface, follow application steps listed above in the “Before Any Application” and “Application to New Concrete” sections.

Supplemental Surface Treatment for All QC Solvent-based Sealers

1. For areas where oil spills may occur, like parking garages and driveways, use QC SOLVENT-BASED SEALERS according to application directions above. QC SOLVENT-BASED SEALERS, upon initial contact with oil, will resist oil stains.

2. However, if oil is left on the surface for an extended period of time or if the oil is not properly cleaned up, the oil may penetrate the sealer and go into the concrete.  Should oil penetrate the sealer, that area can be cleaned with QC CONCRETE DEGREASER to remove oil and recoated with QC SOLVENT-BASED SEALERS.

QC Solvent Seal 27—Drying Times

  • Note – Drying times below will vary depending on surface porosity, temperature, humidity and local conditions.

  • Set to Touch – Surface can be lightly touched one to two hours after application.

  • Recoat – Surface can be recoated two to four hours after each application.

  • Light Traffic – Light traffic can be allowed 24 hours after final coat.

  • Vehicle Traffic – Vehicle traffic can be allowed one to two days after final coat, depending on temperature.

QC Solvent Seal 18—Drying Times

  • Note – Drying times below will vary depending on temperature and humidity.

  • Set to Touch – Surface can be lightly touched 30 – 60 minutes after application.

  • Recoat – Surface can be recoated two to four hours after each application.

  • Light Traffic – Light traffic can be allowed 24 hours after final coat.

Maintenance

  • Day-to-Day Cleaning – QC SOLVENT-BASED SEALERS, like all surface sealers, must be kept clean for maximum durability and protection. Frequent sweeping or vacuum-removal of loose soils will significantly increase the wear-life of QC SOLVENT-BASED SEALERS.

  • Maintenance Cleaning – Clean solvent-based sealed surfaces with QC FLOOR CLEANER (a water-based detergent cleaner), rinse and let dry. On interior surfaces where routine maintenance is required, use an automatic scrubber.

  • Removing Ground-in Soils – For removal of ground-in soils, use QC FLOOR CLEANER diluted to two to four ounces per gallon of water. For interior surfaces, use an automatic scrubber equipped with light-cleaning scrub pads. Pick up cleaner residue with a wet vacuum or automatic scrubber. For outdoor surfaces, scrub with a low-speed buffer. Rinse by pressure-washing thoroughly. For both indoor and outdoor surfaces, let dry before opening to traffic.

  • Preparing Interior Sealed Surface for Additional Floor Finishes – After sealing interior surface with QC SOLVENT-BASED SEALERS, it is recommended that QC INTERIOR FLOOR FINISH then be applied as a protective topcoat. To prepare sealed surface for a finish application, clean surface with QC FLOOR CLEANER as outlined above, then rinse with clean water, and allow to dry. In addition to QC INTERIOR FLOOR FINISH, all water-based QC SEALERS may be used over QC SOLVENT-BASED SEALERS.

Removablity

QC SOLVENT-BASED SEALERS may be removed using QC SOLVENT SEAL STRIPPER (see separate QC PRODUCT INFORMATION BULLETIN for this specific product use).

Limitations

  • QC SOLVENT-BASED SEALERS will protect concrete from dusting and soiling if applied properly, evenly, with adequate film thickness, and with sufficient coverage as outlined in the application directions.

  • Insufficient number of coats of QC SOLVENT-BASED SEALERS will result in inadequate protection for the concrete.

  • Failure to remove dirt and debris from the surface or failure to properly clean the surface will result in premature wear and will impair penetration.

Coverage Guide

  • Note – Actual coverage may vary depending on the texture, porosity, condition of the concrete, the application method, and other local conditions. Two light coats of QC SOLVENT-BASED SEALER at the recommended coverage rate are usually sufficient to seal and protect. However, if you want increased gloss, durability, and extra protection, apply additional coats after initial coats are dry.

  • Smooth Finish, Per Coat – Material usage, per coat, is approximately 300 – 500 square feet per gallon.

  • Rough or Broom Finish, Per Coat – Material usage, per coat, is approximately 250 – 400 square feet per gallon.

Package Sizes

  • 1-gallon unit

  • 5-gallon metal pail with built-in pour spot

  • 55-gallon drum

QC Solvent 27—Technical Data

  • Colour ....................Clear (unless tinted to QC specification colours)

  • Odor ....................Sweet

  • Solids Content .......27%

  • Specific Gravity ......0.82

  • Density .................4.3 pounds per gallon

  • Flash Point ............40 °F

  • VOC Content .........Less than 400 grams per liter

QC Solvent 18—Technical Data

  • Colour ....................Clear (unless tinted to QC specification colours)

  • Odor ....................Sweet

  • Solids Content .......18%

  • Flash Point ............40 °F

  • VOC Content .........400 grams per liter

  • Resin ....................Pure acrylic, nonyellowing

colours

Using QC SOLVENT-BASED TINT CONCENTRATES, QC SOLVENT-BASED SEALERS may be tinted to match any colour shown on any QC colour chart or may be tinted to match any custom colour. Because tint colours may vary slightly from batch to batch, be sure to order enough tinted sealer to complete a specific job.

Product Handling

For complete instructions on handling and use, consult the corresponding Material Safety Data Sheets before using product.

Warranty

QC SOLVENT-BASED SEALERS are warranted to be of uniform quality within manufacturing tolerances. Since control is not exercised over use, no warranty, expressed or implied, is made as to the effects of such use. Seller’s and manufacturer’s obligation under this warranty shall be limited to refunding the purchase price of that portion of the material proven to be defective. The user assumes all other risks and liabilities resulting from use of this product. If you have any questions, please contact QC CONSTRUCTION PRODUCTS CANADA.
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