Product Overview

Oil-based polyurethane grout is a type of grout formed by the reaction between composite polyol and polyisocyanate. Its molecular structure does not contain hydrophilic polyether, making it insoluble in water but soluble in organic solvents. When the oil-soluble polyurethane grouting material comes into contact with water, it immediately reacts, generating gas, expanding in volume, and forming a foam body that is insoluble in water and has a certain strength.

Application Scope

• Reinforcement and waterproofing for buildings such as tunnels, subways, dams, and basements.
• Filling cracks in concrete components, especially suitable for handling dry and wet cracks.
• Areas in contact with drinking water, due to its excellent chemical resistance and water resistance.

Product Features

1.Fast Reaction: The material reacts immediately upon contact with water, generating large amounts of carbon dioxide and forming a closed-cell foam structure.
2.High Expansion Rate: The foam expansion rate can reach 1000%, forming a hard polyurethane network with high compressive strength.
3.Excellent Chemical Resistance: After curing, the resulting solid body has a water absorption rate of less than 0.5% and exhibits excellent acid and alkali resistance, maintaining over 95% strength in environments with pH 2-12.
4.Good Mechanical Properties: With an elastic modulus exceeding 200 MPa, it is suitable for structural reinforcement.

Storage & Transportation

1.Storage Conditions:

• Environmental Requirements: Oil-based polyurethane grout should be stored in a dry, cool place, avoiding direct sunlight and high temperatures.
• Sealed Storage: The product should be sealed and stored in a dry, ventilated indoor location, away from open flames and heat sources. The shelf life of the original packaging under static conditions is 12 months.
• Fire Safety: Since polyurethane materials are flammable, appropriate fire-fighting equipment should be available in the storage area, and regular inspection and maintenance should be carried out.

2.Transportation Precautions:

• Packaging Requirements: Polyurethane raw materials must be separated from other items during transport, especially from food items. For single-component polyurethane materials, attention should be paid to packaging integrity during transport to prevent leakage. If double-layer packaging is required, separators like wooden boards should be used.
• Rain and Sun Protection: During transport, protect the materials from rain and sunlight, avoid impacts and falls, and handle the packaging with care to prevent damage.
• Fire Safety: Since most polyurethane raw materials are packed in iron barrels, necessary fire-fighting equipment should be available during transportation.

3.Usage Precautions:

• Uniform Mixing: For two-component polyurethane adhesives, mix components A and B in the specified ratio before construction. Use a stirrer to mix thoroughly until the color is uniform and there are no obvious air bubbles.
• Environmental Control: The temperature of the construction environment should be controlled to avoid extremely high or low temperatures, which can lead to decreased performance or poor curing of the polyurethane adhesive. The environment should also be well-ventilated to avoid prolonged inhalation of harmful gases.
• Fire Safety: During use, keep away from open flames and heat sources. Construction personnel should wear appropriate protective equipment, such as gloves, masks, and goggles.    

Application Process

1. Pre-construction Preparation:

• Clean the Substrate: Ensure that the substrate is dry, clean, and free from oil stains, debris, and other contaminants that could affect the grouting effect.
• Check Tools: Prepare the necessary tools, including the grouting machine, grouting pipes, and stirrer, ensuring they are in good working condition.
• Material Preparation: Prepare the required amount of oil-based polyurethane grouting liquid according to project needs and ensure its quality is up to standard.

2. Grouting Operation:

• Stir the Grouting Liquid: Pour the oil-based polyurethane grouting liquid into a stirrer, add an appropriate amount of hardener according to the product instructions, and stir thoroughly until uniform.
• Connect the Grouting Pipe: Securely connect the grouting pipe to the grouting machine, ensuring no disconnection or leakage during the grouting process.
• Start Grouting: Turn on the grouting machine and slowly inject the mixed grouting liquid into the required waterproof areas. During the grouting process, maintain stable pressure to avoid excessive or insufficient pressure, which may affect the grouting result.
• Observation and Adjustment: During the grouting, closely observe the situation. If leakage or pipe blockages occur, adjust the grouting pressure or clean the blockages as needed.
• End of Grouting: Once the grouting liquid fills the entire waterproof area, turn off the grouting machine and disconnect the grouting pipe to complete the grouting operation.

3. Precautions:

• Construction Environment: The construction environment should be dry and well-ventilated. Avoid performing the operation in damp or enclosed spaces.
• Safety Protection: Construction personnel should wear safety glasses, gloves, and other protective equipment to prevent the grouting liquid from splashing onto the skin or eyes.
• Post-construction Maintenance: After grouting, regularly inspect and maintain the grouted area to ensure the waterproofing effect is long-lasting and effective. If leakage or damage occurs, perform timely repairs or replacements.