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Adhesives Technology Convergent Pentra-Sil (244+) 5 Gallon Pail
Nano-Lithium hardener, densifier and hydrophobic sealer ideal for protecting concrete and masonry surfaces against damage from freeze-thaw cycles, moisture, and chloride ion intrusion.
- No film to remove
- No rinsing required
- Breathable
$424.85
SKU
20045
Convergent Pentra-Sil 244+ – 5 Gallon Pail
Pentra-Sil 244+ is a premium Nano-Lithium hardener, densifier, and hydrophobic sealer for concrete and masonry. It combines lithium densification with reactive silicone chemistry to meet NCHRP 244 chloride protection in a single application. The treatment penetrates to reduce permeability, harden and dust-proof the surface, and help prevent efflorescence and spalling while remaining breathable and UV stable. Do not use as a time-of-placement densifier; wait at least seven days after placement before application.
Key Features
- Hardens, densifies, dust-proofs, and imparts hydrophobic protection.
- Chloride and freeze-thaw defense; meets NCHRP 244 for chloride protection.
- Breathable, UV stable; no film to lift or peel.
- Reduces efflorescence and surface sweating.
- Low odor; easy spray application and no rinse on most surfaces.
- Greenguard Gold certification for low chemical emissions.
- Improved performance vs. untreated concrete: abrasion resistance +30.4%; water absorption improvement up to 8.4%.
Applications
- Parking garages, sidewalks, driveways, loading docks, pool decks.
- Warehouses, manufacturing and distribution facilities.
- Retail, schools, offices, healthcare, laboratories, and common areas.
- Aircraft hangars, fire stations, automotive dealerships and service bays.
- Food and beverage plants, cold storage, wastewater and chemical plants.
Technical Specifications
| Packaging (this item) | 5 gal pail (18.93 L). Also available: 1 gal, 55 gal drum, 275 gal tote. |
| Appearance | Liquid with red tint; dries clear. |
| Total Solids / VOC | 17.1% solids; VOC < 50 g/L. |
| pH / Specific Gravity | pH 11–12; specific gravity 1.10. |
| Estimated Coverage | Machine-troweled: 600–800 ft²/gal; broom-finished: 250–350 ft²/gal (substrate dependent). |
| Application Conditions | Apply when temperatures will remain above 40°F for at least 2 hours after application; keep surface wet with product for ~20 minutes. |
| Use Timing | Not a time-of-placement densifier; wait minimum 7 days after placement to avoid white staining. |
| Clean Up | Soap and water. Product is alkaline; follow SDS guidance. |
| Certifications | UL 2818 Greenguard Gold low-emissions. |
| Performance Notes | Abrasion resistance +30.4% (ASTM C779); water absorption improvement 8.4% (ASTM C642, Type I) and 5.9% (Type IL). |
| Shelf Life / Freeze Point | 1 year unopened; freeze point 32°F. |
Frequently Asked Questions
How soon after placing concrete can I apply 244+?
Wait at least seven days after placement. Early application can cause white staining on new concrete.
Do I need to rinse after application?
No rinse is needed on most surfaces. On machine-troweled, dyed, acid-stained, or integrally colored concrete, scrub with water after 20–30 minutes and pick up excess material.
What surface prep is required?
Remove dirt, laitance, curing compounds, or coatings that block penetration. Avoid acidic or citrus cleaners; neutralize any residues with an alkaline cleaner.
Is it breathable and UV stable?
Yes. The treatment is breathable and not susceptible to UV damage.
How do I estimate coverage?
Plan for 600–800 ft²/gal on machine-troweled concrete and 250–350 ft²/gal on broom-finished surfaces; porosity and conditions affect actual rate.
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