Description
MoistureShield™ is a simple spray-on solution that creates a permanent moisture barrier inside your concrete — not just on top. It forms a protective membrane 2–4mm below the surface that waterproofs, cures, and seals while maintaining the original concrete texture. There is no visible change to the appearance of the concrete after treatment. This lifetime barrier controls moisture and pH levels, protecting all floor coverings and coatings. As moisture vapor moves through the slab carrying soluble salts, MoistureShield™'s polymer fills the capillaries and absorbs those salts, so they cannot rise to the surface and attack adhesives, coatings or floor coverings. Apply cement-based materials once dry to the touch or install flooring and coatings just 12 hours after the surface appears dry.
InnerCrete™ Technology: Unlike Conventional Solutions
Unlike silicate-based densifiers that create crystalline structures and may cause micro-fractures, MoistureShield™ with InnerCrete™ Technology works with concrete's natural chemistry in both new and existing slabs.
This permanent solution prevents moisture-related problems including coating delamination, cracking, staining, mold growth, and efflorescence — all while maintaining concrete's structural integrity.
Features & Benefits
Ideal Applications
Product Details
| Property | Specification |
|---|---|
| Packaging | US 4-gallon pail (15.14L) or 275-gallon tote (1,041L; ships as one pallet) |
| Pallet Qty. | 36 pails per pallet |
| Color | White Liquid (clears out as it absorbs into slab) |
| Shelf Life | 24 months in unopened containers; Do Not Allow Material to Freeze |
| Dry Time | 30 min to 2 hours – depending on humidity and air flow |
| Application Temperature | 38°F (rising) to 90°F |
| ASTM F710 | pH can be as high as 14 |
| ASTM F2170-11 | Relative Humidity of slab can be 99% to HI RH |
| ASTM F1869 (MVER) | Reduces MVER from 10 lbs. to <3 lbs. per 1000 ft² / 24 hrs (based on 13 years of field data). Above 10 lbs., use S3 MRP. |
Coverage Rates
| Application | Coverage Rate | Notes |
|---|---|---|
| New Concrete (Time of Pour) | 150–187 SF/gallon (600–750 SF per 4-gal pail; max 51,500 SF per 275-gal tote) | Apply from the time the slab is walkable without damage, up to 24 hours after final finish. Do not exceed 750 SF per pail — the full rate is required for cure & seal performance. |
| Sweating Slab | 200 SF/gallon (800 SF per pail; 55,000 per tote) | Apply Surface Prep EXT™ first, remove fully, then apply MoistureShield™ |
| Existing Concrete | 225 SF/gallon (900 SF per pail; 61,875 per tote) | For moisture mitigation |
Surface Preparation
All substrates must be clean, sound, and have a minimum 250 psi tensile bond strength when tested per ASTM D4541. Concrete must be free from oil, grease, paint, and any contaminants that would prohibit penetration. S3 recommends Surface Prep EXT™ for concrete preparation. Do not apply over densifiers or hardeners, or over non-dissipating, film-forming cure and seals — these must be removed by mechanical grinding to open the concrete's porosity before application (Surface Prep EXT™ will not remove them). Never apply over a separate cure and seal; MoistureShield™ is itself a cure and seal. Concrete must be porous per ASTM F3191 Water Drop Test and free of visible standing water.
Application
Equipment Selection
| Area Size | Equipment | Notes |
|---|---|---|
| Small Areas | Pump sprayer with cone tip at low pressure | WARNING: Avoid high pressure that creates aerosol mist |
| Large Areas | Airless sprayer with 0.024–0.031" fan tip | Adjust pressure on new concrete to prevent surface damage |
| Alternative | Agricultural sprayer with 5 GPM diaphragm pump and 0.50–1.0 GPM fan tip | — |
Application Technique
Critical Notes for Success
Challenging Weather Conditions
Hot Weather (Above 90°F / 32.2°C or Below 30% RH)
Windy Conditions (Exceeds 10 MPH)
Cold Weather (Minimum 35°F / 1.7°C and Rising)
Rain Events & Weather Interruptions
Managing Weather Interruptions
Always restart application from the last successfully treated point.
Traffic Guidelines
Important Notes
Activation & Maintenance
Product begins activation immediately and will continue to react in the presence of water. Results will be noticeable within 24 hours. No special maintenance required — clean surfaces as needed.
Storage & Handling
Protect from freezing. All containers must be sealed properly when stored. Secure containers during transport to prevent damage. Lids, caps, and closures must be tightened during transport and storage to avoid spillage.
Disposal
MoistureShield™ is fully biodegradable. Neutralizing and dilution with water will be required to meet local waste or sewage disposal requirements. Seek advice on local authority requirements before disposal. Spills should be contained and disposed of under the same requirements. Do not mix with other materials.
Safety Precautions
As with all chemicals, good hygienic habits must be observed, and the wearing of protective clothing and gloves is advised. Before using any S3 Surface Solutions, LLC product, please read and follow the product Safety Data Sheet (SDS). Use this product only as directed. Keep out of the reach of children.
Warranty
The data, statements, and recommendations set forth in this product information sheet are based on testing, research, and other development work carefully conducted by us, and we believe such data, statements, and recommendations will serve as reliable guidelines. However, this product is subject to numerable uses under varying conditions over which we have no control, and accordingly, we do NOT warrant this product is suitable for any particular use. Users are advised to test the product in advance to make certain it is suitable for their particular production conditions and particular use or uses. All products manufactured by us are warranted to be first class material and free from defects in material and workmanship. Liability under this warranty is limited to the net purchase price of any such products proven defective, or, at our option, to the repair or replacement of said products upon their return to us transportation prepaid.