Weather Resistant Two Part Polyurethane Polysulfide Sealant for Outdoor Construction

Product Description

Product Description

Two-component polyurethane sealant 

Two-component polysulfide sealant 

Two-component polyurethane sealant (also known as two-component polyurethane building sealant) is a two-component reaction-curing sealing material with polyurethane prepolymer as the main component. The product consists of two components, A and B. Component A is a milky white or light yellow viscous polyurethane prepolymer, and component B is a black paste or liquid formed by mixing and dehydrating a curing agent and additives. After the two components are mixed in a certain proportion, they are cured into a rubber-like elastomer through a chemical reaction.

Two-component polysulfide sealant (also known as two-component polysulfide sealant paste) is a two-component, room-temperature vulcanizing waterproof sealing material made from liquid polysulfide rubber as the main base, combined with tackifying resins, vulcanizing agents, accelerators, reinforcing agents, and other chemical additives, through a special polymer material synthesis process. The product consists of component A and component B . After the two components are mixed in a given ratio, they cure at room temperature through a cross-linking reaction to form a dense, rubber-like elastomer. 

Main Features---Two-component polyurethane sealant:

Main Features---Two-component polysulfide sealant:

1. High Mechanical Strength: Exhibits high tensile and cohesive strength, resulting in a stronger final bond strength than single-component sealants, meeting structural sealing requirements.

2. High Elasticity and Resilience: Excellent elasticity and resilience, making it particularly suitable for dynamic joints, expansion joints, and other applications requiring displacement resistance.

3. Good Low-Temperature Flexibility: Maintains good flexibility and elasticity even at low temperatures, resisting brittleness; low-temperature flexibility reaches -30℃ to -40℃.

4. Outstanding Abrasion Resistance: Excellent abrasion resistance is a key feature distinguishing it from other sealants.

5. High Performance Adjustability: Hardness, elasticity, and curing speed can be adjusted over a wide range by modifying the composition and ratio of the two components.

6. Resistant to Biological Aging: Exhibits excellent resistance to biological aging, resisting degradation from biological factors over long-term use.

7. Long Service Life: Good weather resistance.long life service Moderately priced: Compared to some high-end sealants, two-component polyurethane sealants offer a high cost-performance ratio.

1. Excellent Adhesion: Adheses well to various substrates such as concrete, metal, and glass, providing a strong bond that is not easily detached.

2. Strong Elastic Recovery: Exhibits excellent elongation at break, capable of stretching several times its original size. After curing, it exhibits strong flexibility and is not prone to cracking or aging. 

3. Good Durability: Does not flow at high temperatures and does not become brittle at low temperatures. It possesses excellent weather resistance and atmospheric aging resistance, and will not crack even after long-term use.

4. Chemical Corrosion Resistance: Excellent resistance to water, oil, solvents, seawater, and various chemicals.

Outstanding Waterproofing and Sealing: Excellent airtightness and waterproofing performance, with extremely low water vapor permeability, suitable for areas subject to long-term immersion in water.

5. Safe and Environmentally Friendly: The product is non-toxic, non-polluting, harmless to humans, and does not corrode or pollute sealing components.

6. Easy to construct: It can be cold-applied at room temperature, is easy to operate, can be cured at room temperature, and has a fast construction speed.

 

Specification

Polyurethane sealant technical parameter
Item		Technical Parameter
		50LM	50HM	35LM	35HM	25LM	25HM	20LM	20HM
Density (g/cm3)		Specified value ±0.1
Liquidity	Sagging (N-type)/mm	≤3
	Levelness (L-type)	Smooth and flat
Surface drying time(h)		≤24
Extrudability(mL/min)		≥150
Applicable period (h)		≥0.5
Tensile modulus(MPa)	23℃	≤0.4 and ≤0.6	>0.4 and >0.6	≤0.4 and ≤0.6	>0.4 and >0.6	≤0.4 and ≤0.6	>0.4 and >0.6	≤0.4 and ≤0.6	>0.4 and >0.6
	-20℃
Elastic recovery rate(%)		≥70
Adhesion at constant elongation		No destruction
Adhesion at constant elongation after immersion in water		No destruction
Adhesion after cold drawing and hot pressing		No destruction
Mass loss rate(%)		≤5
Adhesion after artificial weathering		No destruction
Note: Above product technical parameters are only for reference, the detail specification can be customized as your request.

Polysulfide sealant technical parameter
Item		Technical Parameter
		50LM	35LM	25LM	25HM	20LM	20HM
Density(g/cm3)		Specified value ±0.1
Liquidity	Sagging (N-type)/mm	≤3
	Levelness (L-type)	Smooth and flat
Surface drying time(h)		≤24
Applicable period(h)		≥2
Tensile modulus(MPa)	23℃	≤0.4 and ≤0.6	≤0.4 and ≤0.6	≤0.4 and ≤0.6	>0.4 and >0.6	≤0.4 and ≤0.6	>0.4 and >0.6
	-20℃
Elastic recovery rate(%)		≥80
Adhesion at constant elongation		No destruction
Adhesion at constant elongation after immersion in water		No destruction
Adhesion after cold drawing and hot pressing		No destruction
Mass loss rate(%)		≤5
28d Adhesion at constant elongation after immersion in water		No destruction			-
Low temperature flexibility(-40℃)		No Crack
Note: Above product technical parameters are only for reference, the detail specification can be customized as your request.

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FAQ

1.Are you factory or trading company?

We are factory specializing in formulating and manufacturing of adhesives and sealants, offering you a full range of products for industry and building usage. Our products have been widely exported to all over the world.  

2. Can I visit your factory?
A: Yes, sure. We sincerely welcome you to visit our factory anytime.

3.Can I have a sample order for polyurethane sealant?
Yes, we welcome sample order to test and check quality. 

4.Could you provide OEM service?
Yes,of course. The product can be customized as your detail request.

5.Is there a quality guarantee for the products?
Yes. We provide a quality guarantee for our finished products. Strict control standards are implemented at every stage, from raw material procurement to manufacturingand and final inspection before shipment, to ensure product performance meets technical specifications.

6.What management system certifications does your company hold?
Our company has established and maintains integrated management systems, and is certified to Quality Management System (e.g., ISO 9001), Environmental Management System (e.g., ISO 14001), and Occupational Health & Safety Management System (e.g., ISO 45001) standards.

7.What other products does your company offer besides sealants?
In addition to sealants, we also offer engineering materials including rubber waterstops, PVC waterstops, steel-reinforced waterstops, water-swelling waterstops, bridge bearings (pot, spherical, laminated rubber, etc.), and expansion joints (modular, rubber plate, etc.).