Overview of Concrete Waterproofing Agent

Concrete waterproofing agents are specialized treatments applied to concrete surfaces to prevent water penetration and protect against moisture damage. These agents enhance the durability and lifespan of concrete structures by creating a barrier that repels water, thus reducing the risk of corrosion, efflorescence, and structural degradation.

Features of Concrete Waterproofing Agent

Water Repellency: Forms a hydrophobic layer that prevents water absorption.
Durability Enhancement: Increases the longevity of concrete by protecting it from moisture-related damage.
Corrosion Resistance: Protects reinforcing steel inside the concrete from corrosion caused by water and chloride ions.
Application Flexibility: Can be applied through various methods including spraying, brushing, or mixing directly into fresh concrete.
Breathability: Allows moisture vapor to escape while preventing liquid water ingress.
Chemical Stability: Resists degradation from exposure to chemicals and environmental factors.

(POLYURETHANE PU SEALANT single component waterproofing for concrete)

Specifications of POLYURETHANE PU SEALANT single component waterproofing for concrete

POLYURETHANE PU SEALANT is a single-component, moisture-curing elastomeric sealant designed for waterproofing and securing concrete structures. Its sophisticated polyurethane solution makes sure phenomenal attachment, adaptability, and resilience in both indoor and outside settings. The sealant treatments upon direct exposure to atmospheric wetness, creating a resilient, rubber-like membrane that withstands water infiltration, UV radiation, and temperature fluctuations. It is optimal for sealing growth joints, fractures, and voids in concrete surface areas such as roof coverings, porches, cellars, vehicle parking decks, and water containers. Secret requirements include a thickness of about 1.2 g/cm ³, a tensile toughness of 2.5– 3.5 MPa, and a prolongation at break surpassing 400%, guaranteeing it fits structural movement without cracking. The sealer displays superb adhesion to concrete, masonry, steel, and timber, with a bond toughness of ≥ 1.5 MPa. It remedies tack-free within 30– 60 minutes at 25 ° C and 50% relative moisture, achieving complete remedy in 24– 72 hours depending upon ambient problems. When cured, it performs across a temperature level variety of -40 ° C to +90 ° C, preserving versatility in cold conditions and security under high warm. Its low unpredictable organic substance (VOC) content adheres to environmental guidelines, making it secure for enclosed areas. The sealant is resistant to water, oils, mild chemicals, and abrasion, making sure lasting protection versus destruction. Application is straightforward using a caulking weapon, with advised joint dimensions of 10– 30 mm width and 10– 20 mm deepness. It is readily available in common colors like gray, black, and white, with optional UV-stable variations for outside usage. Shelf life is one year in unopened, initial product packaging kept at 5– 25 ° C. Safety and security safety measures include preventing skin get in touch with and ensuring air flow during application. Compliant with ASTM C920 and EN 15651 standards, this PU sealer is a dependable remedy for waterproofing concrete, boosting architectural longevity, and protecting against water damage.

(POLYURETHANE PU SEALANT single component waterproofing for concrete)

Applications of POLYURETHANE PU SEALANT single component waterproofing for concrete

Polyurethane (PU) sealer, a single-component waterproofing remedy, is a flexible and durable product created to safeguard concrete structures from water infiltration, corrosion, and ecological damages. Its one-of-a-kind formula integrates versatility, attachment, and resistance to weathering, making it ideal for a vast array of applications. Below are essential uses:

** Expansion Joints and Fractures: ** PU sealer is widely made use of to secure development joints in concrete slabs, bridges, auto parking decks, and commercial floorings. It suits movement triggered by thermal expansion, resonances, or working out, protecting against water ingress while maintaining flexibility. It additionally effectively fills up cracks in walls, foundations, and pavements, recovering architectural honesty and preventing additional deterioration.

** Roofing Waterproofing: ** Applied on flat roofings, parapets, and roof-wall joints, PU sealant develops a smooth, UV-resistant barrier versus rainfall and dampness. It adheres securely to concrete surfaces, even in changing temperatures, and remains flexible to prevent fracturing.

** Cellars and Underground Structures: ** Made use of to water resistant basement walls, passages, and retaining wall surfaces, the sealer blocks water infiltration in below-grade concrete. Its moisture-curing building allows it to bond to damp surfaces, making it suitable for moist atmospheres.

** Balconies and Terraces: ** PU sealer seals spaces in concrete terraces, balconies, and sidewalks, securing versus water damage and freeze-thaw cycles. It also protects against mold and mildew growth by creating a water tight layer.

** Pipeline and Infiltration Sealing: ** It secures around pipelines, channels, and energy penetrations in concrete wall surfaces or floors, making certain airtight and water tight seals. This is important in pipes, a/c systems, and electrical installations.

** Marine and Facilities Projects: ** In anchors, piers, and seaside structures, PU sealant stands up to deep sea rust and rough weather condition, expanding the lifespan of concrete in marine environments.

The single-component formula requires no mixing, simplifying application by means of caulking weapons. It treatments upon direct exposure to climatic wetness, creating a rubber-like, paintable finish. Suitable with coverings and overlays, it’s excellent for both new construction and repair services. With exceptional chemical resistance and sturdiness, polyurethane PU sealant is an economical solution for lasting concrete defense, minimizing upkeep requirements and improving architectural resilience.

Company Introduction

Welcome to Footprintbooks, a leading supplier in the international market for high-quality concrete admixtures. Our extensive product range includes superplasticizers, waterproofing agents, accelerators, and more, designed to meet diverse construction needs. With cutting-edge technology and stringent quality control, we ensure our products enhance durability, workability, and sustainability of concrete structures. Committed to excellence, we serve customers across the globe, offering tailored solutions and exceptional service. Partner with us for reliable and innovative concrete admixture solutions that build the foundations of tomorrow’s world.

If you have any questions, please feel free to contact us(nanotrun@yahoo.com).

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs of POLYURETHANE PU SEALANT single component waterproofing for concrete

What is polyurethane PU sealant, and how does it work for concrete waterproofing? Polyurethane PU sealant is a single-component, flexible, moisture-curing adhesive that forms a durable, waterproof barrier on concrete surfaces. It reacts with ambient moisture to expand and bond tightly to cracks, joints, or gaps, preventing water infiltration while accommodating structural movement. It’s ideal for sealing expansion joints, pipe penetrations, and cracks in concrete foundations, roofs, or basements.

How do I apply polyurethane PU sealant to concrete? Clean the surface thoroughly, removing dirt, grease, or loose debris. Ensure the area is dry or slightly damp (not soaking wet). Cut the nozzle to the desired size, load the sealant into a caulking gun, and apply evenly into gaps or cracks. Smooth with a tool or finger for better adhesion. The sealant cures upon exposure to air and moisture, forming a waterproof elastomeric layer. Avoid application in extreme temperatures or direct rain before curing.

How long does it take to cure? Cure time depends on temperature, humidity, and sealant depth. A thin layer (3–5 mm) typically skins over in 20–60 minutes and fully cures in 24–48 hours. Thicker applications may require several days. Higher humidity accelerates curing, while cold or dry conditions slow it down. Avoid submerging or stressing the sealant until fully cured.

Can it be painted or coated after curing? Yes, once fully cured (usually after 48 hours), polyurethane PU sealant can be painted with most acrylic, epoxy, or urethane-based coatings. Test compatibility on a small area first. The sealant itself remains flexible and UV-stable, making it suitable for both indoor and outdoor use without discoloration or cracking.

Is polyurethane PU sealant resistant to chemicals and weather? Yes, it offers excellent resistance to water, weathering, and mild chemicals, including alkalis and acids commonly found in concrete. It retains flexibility in temperatures from -40°F to 180°F (-40°C to 82°C), preventing cracks due to thermal expansion or vibration. However, prolonged exposure to fuels, solvents, or strong acids may degrade the sealant over time.

What surfaces or gaps is it unsuitable for? Avoid using on constantly submerged surfaces, oil-contaminated concrete, or joints with excessive movement beyond its elongation capacity (typically 200–400%). It’s not recommended for PVC or polyethylene plastics without primer. Always check manufacturer guidelines for specific limitations.

(POLYURETHANE PU SEALANT single component waterproofing for concrete)