Hard Rock Concrete Supplies carries a full range of supplies for the concrete industry. Our range of products includes; Sealers, Cure & Seals, Rebar (Steel and GFRC), Insulation, Support Brackets, Weeping Tile, Patching and Repair Materials; as well as hand and power tools.
Our team prides itself on our customer service, product knowledge, and wide range of quality products and would love the opportunity to talk with you about all of your concrete needs. 

HS 300LV Solvent Base Clear Penetrating Concrete Sealer 1 Gallon

SKU: **403404
Regular price $140.99



HS 300LV concrete sealers is a premium, high-performance, single-component silane, acrylic (30% solids), and low-VOC (400 g/l) sealer designed for SureCrete overlays or other cement-based products. As with most acrylics, it is vapour-permeable and readily applies outside. However, HS 300LV is specially formulated for extreme climates where a low-VOC sealer is required.

The unique silane formulation creates the nano-sealer technology that deeply penetrates and reacts internally with cement, slowing moisture migration and efflorescence and intensifying bond capacity. 

Even in warmer climates, HS 300 LV's slow-evaporating solvents will not "cotton candy" before the applicator can finish a tight, smooth surface. A single coat application will provide a UV shield, enhance the beauty, and protect the surface of driveways, garage floors, patios, walkways, pool decks, and stucco.


The principles for surface preparation for HS 300LV are aligned with those for other coating systems placed on concrete or cement-based products. The substrate must be:

  1. Clean: The surface must be free of dust, dirt, oil, grease, paints, glues, non-acrylic sealers, curing agents, efflorescence, chemical contaminants, rust, algae, mildew, and other foreign matter that may serve as a bond breaker.
  2. Cured: Cement-based overlays typically cure sufficiently overnight (refer to specific SureCrete overlay TDS). Other cement-based products may require up to 28 days, depending on temperatures and humidity.
  3. Sound: No system should be placed on a cement-based overlay that is flaking or spalling; the substrate must be sound. If the surface is delaminating, then diamond grinding, shot blasting, or other mechanical means should be used to remove the delaminating areas.
  4. Profiled: Customarily, cement-based overlays do not require profiling. For other cement-based products, proper profile should follow the standard established by the International Concrete Repair Institute (ICRI) Technical Guideline No. 03732 for Concrete Surface Profile (CSP).

The established profile is categorized as CSP-1. To properly profile some cement-based products (especially exterior applications), use a pressure washer equipped with a turbo-tip and SCR (see SCR TDS). In one step, SCR profiles, cleans, and provides a measure of degreasing. Some substrates may require more aggressive profiling through diamond grinding or shot blasting.


The HS 300LV silane-acrylic formula is the premier choice to reseal or refresh an existing decorative concrete project. The surface should be cleaned with a pressure washer and SCR (see SCR TDS).

  1. a) Any old, loose, and flaky sealer that is still present must be removed.
  • Chemically: Fast-Strip Plus, Enviro-Strip (see appropriate TDS), or other commercial stripper.
  • Mechanically: diamond grinding or shot blasting
  1. b) This product should only recoat an existing solvent-based acrylic. Determine a substrate’s unknown existing sealer by placing a paper towel saturated with xylene over a small area. Cover the towel with plastic and allow it to remain in place for 15 minutes. Solvent-based acrylic may feel slippery to the touch, but water-based acrylic turns into a slimy mess that can be scraped off easily.
  2. c) Before recoating, prepare on-site a small test area on the intended substrate to establish the compatibility of solvents and avoid blistering and delamination.
  3. d) Recoat applications may be complete with a single coat; always evaluate the surface to see if a second coat is needed. The best performance is achieved with thin coats.



  1. The product is flammable. Interior applications: turn off all fuel-burning appliances and pilot lights.
  2. Provide for ventilation so that vapours do not accumulate.
  3. Select appropriate PPE (personal protection equipment). The use of a NIOSH-approved respirator may be required. Refer to SDS.

Mask all areas requiring protection.

Temperature or weather

  1. Avoid application on extremely cold or hot days or during wet, foggy weather.
  2. Apply with ambient and surface temperatures ranging above 50°F (10°C) and below 90°F (32°C), and that will remain within the ranges for at least 24 hours following application.
  3. Do not apply outside if precipitation is forecast within 24 hours of application.
  4. The substrate must be dry throughout all steps.

First coat


  1. Utilize a bucket grid to apply a thin film.
  2. Roller covers require a solvent-resistant core.
  3. The correct nap size varies due to texture. For example, 34" is recommended for heavy-textured patterns, while 14" mohair is recommended for very smooth surfaces.
  4. Do not allow puddling.
  5. Exercise care to eliminate roller tracks through back rolling.

Airless Spraying

  1. An airless sprayer should be capable of a minimum 5 gpm discharge.
  2. Tip size should be approximately.015"–.019" with a 65° fan.
  3. For horizontal surfaces, utilize an 8"–10" extension.
  4. Maintain a wet edge between passes.

Pump-up Sprayer

  1. Select a solvent-resistant sprayer.
  2. Select a fan or cone tip as preferred that can pass 30% solids.
  3. Have sufficient tips on hand to allow clean-up that will not interrupt application.
  4. If necessary, backroll the sprayed area to lay the product flat.

When the first coat is able to be walked on, a second coat may be applied. The best protection is achieved through the application of two thin coats.

Second Coat

  • Applies identically to the first coat.
  • Allow 24 hours of cure time prior to foot traffic.
  • Allow 72 hours of cure time prior to vehicular traffic.


Two recognized US agencies have issued directives on the minimum coefficient of friction: OSHA (Occupational Safety and Health Administration) and the Department of Justice through the ADA (Americans with Disabilities Act). The ADA is the more stringent of the two.

The ADA directs that accessible walkways have a minimum coefficient of friction of 0.6. Ramps have been directed to be 0.8. The applicant assumes responsibility for meeting these standards. Areas that may become wet, oily, or greasy require special attention. Refer to the SureGrip (additive) TDS and its accompanying coefficient of friction table.


Due to condition-specific sites, always prepare an adequate number of test areas. Wear protection systems and aesthetic suitability for the products’ intended use should be included. On-site sample approval is especially critical in substantial, heavy traffic situations or custom colorations.


Before HS 300LV dries, spills and tools can be cleaned up with a solvent such as xylene or acetone.


Contact your local government's household hazardous waste coordinator for information on the disposal of unused products.


  • For use by trained professionals who have read the complete SDS.
  • The product performs best on a concrete slab that has no ponding or standing water.
  • When masking, use caution while taping to a floor that is not completely cured, especially at edges, as delamination may occur.
  • Protect from metal wheel traffic and some furniture where points of contact may be damaging.
  • Chemicals used in tire manufacturing may be detrimental to all sealers from vehicular parking.


The warranty of this product, when used according to the directions, is limited to a refund of the purchase price or replacement of the product (if defective), at the manufacturer's or seller’s option. SureCrete Design Products shall not be liable for the cost of labour or direct and/or incidental consequential damages.



The product is flammable. Avoid sources of ignition. Keep areas ventilated to prevent the accumulation of vapours.

  • Inhalation: Use a NIOSH approved respirator for organic vapours.
  • Skin Contact: Skin contact may cause irritation. Remove contaminated clothing and wash the affected skin with soap and water. Launder clothing before reuse. If symptoms persist, seek medical attention.
  • Eyes: Wear safety eye protection when applying. If contact occurs, flush the eyes with water for 15 minutes, seek medical attention.


Appearance (cured)

Clear gloss

Appearance (wet) 


Water Resistance 

Excellent, beads water

Mechanical Stability


Light Stability






Storage Stability 

2 years(unopened container)



Application Temperature

50°F – 90°F (10° - 32°C)

Nano Technology

Silane Formulation

VOC content 

400 g/L



ASTM (if applicable)



4 hr. dry / 18 hr. immersion

No blush 



Dry Concrete 


Wet Concrete


QUV accelerated weather testing


250 hr. – no blistering, no yellowing 

Abrasion resistance

12.5 grams loss

Block resistance 



Heat stability @ 120°F (49°C)



Film formation @ 40°F (4°C)


Water absorption

2.4 g /m³

Pencil hardness



Hot tire pick-up


*Under extreme circumstances delaminating could occur. All tire manufacturers were not tested. Chemicals used in tire manufacturing may be detrimental to all sealers from vehicular parking.



Transmission fluid



Remove immediately 

Formula 409


Motor oil


Brake fluid

Remove immediately

These prices include the environmental fee charges.