Roughening agent
A stucco primer is a building material used for wall or base layer treatment, mainly used to enhance paint adhesion or create a rough texture (such as imitation stone, relief, etc.). The following are the conventional usage and precautions of stucco primer for reference:
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How to Use a Roughening Agent
A roughening agent is a building material used for wall or base layer treatment, mainly to enhance paint adhesion or create a rough texture (such as imitation stone, relief, etc.). The following are the conventional usage methods and precautions for roughening agents, for reference:
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I. Pre-construction Preparation
1. Substrate Treatment
o Ensure the substrate (walls, floors, etc.) is flat, firm, free of oil stains, dust, and loose materials.
o Concrete or mortar substrates need to be cured for more than 28 days, with a water content ≤10%.
o If the substrate is highly absorbent, apply a primer or sealing primer first.
2. Tool Preparation
o Roller, brush, special roller for roughening (with teeth or uneven texture), putty knife, mixer, roughening trowel, etc.
o Protective gloves, mask, goggles, and other safety equipment.
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II. Mixing the Roughening Agent
1. Ratio
o Mix the roughening agent powder and emulsion (or water) according to the product instructions. The common ratio is powder:emulsion = 1:0.3-0.5. There is one bag of emulsion and one bag of powder in the bucket.
2. Consistency Adjustment
o Adjust the amount of water according to the construction requirements: Put the emulsion into the bucket first, then add the powder. You don't have to add it all at once; keep some aside and add or subtract according to the required consistency. (Added)
o Stir until smooth and creamy, let stand for 5 minutes, then stir again.
§ Rough texture: Reduce the amount of water to increase viscosity.
§ Fine texture: Increase the amount of water appropriately (within the range allowed by the instructions).
III. Construction Steps
1. Applying the Roughening Agent
o Apply the roughening agent evenly to the substrate using a putty knife or roller, with a thickness of generally 1-3mm.
o Ensure even coverage and no obvious seams or omissions.
2. Roughening Operation
o Method 1 (Roller Roughening):
Use a special roller with teeth or uneven texture and roll it on the surface while wet to form a uniform texture.
§ Control the force and direction to avoid repeated rolling causing the texture to collapse.
o Method 2 (Manual Roughening):
Use tools such as brushes and putty knives to create a rough surface by circling or patting.
o Method 3 (Tapping Roughening)
Use a special tapping tool to tap the roughening agent onto the wall. (Added)
3. Drying and Curing
o Natural drying for 24-48 hours (adjust the specific time according to temperature and humidity, avoid exposure to the sun or low temperatures).
o Check the strength after drying. After passing the inspection, subsequent paint or tile work can be carried out.
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IV. Precautions
1. Environmental Requirements
o The construction temperature is recommended to be 5℃-35℃, and the air humidity ≤85%.
o Avoid working in rainy, windy, or high-temperature direct sunlight environments.
2. Construction Techniques
1.
o The coarseness of the roughening texture is determined by the tools and techniques. It is recommended to test a small area first.
o If multiple layers are required, each layer must be dried before proceeding to the next step.
2. Safety Protection
o Avoid direct skin contact. If accidentally contaminated, rinse immediately with water.
o Clean tools immediately after construction; they are difficult to clean after curing.
3. Storage
o Unopened products should be stored in a cool, dry place, avoiding moisture or freezing.
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V. Common Problems
• Roughening layer peeling: The substrate was not cleaned properly, the water content was too high, or the ratio was incorrect.
• Uneven texture: unskilled workmanship or the slurry is too thin/thick.
• Dry cracking: coating is too thick or high ambient temperature causes shrinkage.
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