1 putty powder powder

Phenomenon: After the construction is completed and dried, the powder is touched by hand.

cause:

1. The polishing time of the interior wall putty powder is not well mastered, and the surface is dried and then polished to remove the powder;

2, the outer wall putty powder, the coating is relatively thin when facing, in the summer high temperature, the water volatilizes quickly, the surface layer does not have enough moisture to cure, so it is easy to remove powder.

3. The product exceeds the shelf life and the bonding strength drops significantly.

4. The product is not properly stored, and the adhesion is greatly reduced after moisture absorption.

5, the base layer has a high water absorption rate, which causes the putty to dry quickly and does not have sufficient moisture for curing.

Solution:

1. When polishing the inner wall putty surface layer, it is necessary to master the appropriate polishing time. The best time for polishing is to polish the water surface of the putty surface immediately after disappearing. Practice has proved that the finish 1~2m2 should be flattened or polished.

2. After the surface of the outer wall putty is dry, it should be moderately polished and fully watered and maintained. The general maintenance is divided into two or more times. If necessary, please use a transparent sealing primer to water (1:5). As a second water spray, the effect will be better.

3. The product must be used within the warranty period. If the shelf life is exceeded, the test must be carried out. After passing the inspection, the construction shall be carried out;

4, the product must pay attention to waterproof treatment, should be in a cool dry place, and to ensure that the envelope is intact.

5, in summer or high temperature and strong wind climatic conditions, before applying putty, it is best to wet the wall with clean water, and the putty can be applied after the surface of the wall has no clear water.

2 putty foaming

Phenomenon: Bubbles are generated during construction and the surface of the putty is foamed after a period of time.

cause:

1. The substrate is too rough and the speed of the batch is too fast;

2, the construction of the putty layer is too thick, greater than 2.0mm;

3. The moisture content of the base layer is too high, and the density is too large or too small. Since it is rich in voids and the water content of the putty is high, it is airtight, and the air is enclosed in the void cavity and is not easily eliminated.

4. After a period of construction, the bursting and foaming on the surface is mainly caused by uneven mixing. The slurry contains powdery particles that are too late to dissolve. After construction, it absorbs a large amount of water and swells to form a burst.

Solution:

1. A large area of ​​foamed putty surface appears. Use a blade to directly break the small bubble and re-scrape the foamed surface with a suitable putty.

2. Putty is generally stirred for 10 minutes or so, then stirred again with an electric mixer and then applied to the wall.

3. Foaming occurs in the second or last surface layer of the construction. The squeegee should be used for blistering before the watermark is removed to ensure that no bubbles appear on the surface of the putty.

4, particularly rough wall surface, the general primer as much as possible to choose thick putty.

5. In an environment where the wall is excessively dry or the wind is strong, the wall should be wetted with water as much as possible. After the wall has no clear water, the putty layer is applied.

3 putty off

Phenomenon: It means that the bond strength between the putty and the base layer is poor, and it falls off directly from the base layer.

cause:

1, the old wall is very smooth (such as steel putty, polyurethane and other oily paint), putty powder and its surface bonding fastness.

2. The new wall is cast using a template with a smooth surface and a large amount of release agent (waste oil or silicone).

3. For the non-mortar substrate such as wood substrate and metal substrate (such as plywood, plywood, particleboard, solid wood, etc.), the putty is directly applied, because the surface expansion and contraction ratio is different, and the water absorption rate of the product is strong and rigid. The interior wall putty can't be deformed, and it usually causes it to fall off after 3 months.

4. The putty exceeds the shelf life and the bond strength decreases.

Solution:

1. Remove the falling layer and treat it according to the following conditions;

2. Grind the old wall surface to increase the surface roughness, and then use the interface agent (10% environmentally friendly glue or interface agent);

3. Remove the surface release agent or other oil and fat components with a degreasing cleaning agent, and then apply the putty.

4. Construction with two-component or special plywood putty.

5, marble, mosaic, tile and other exterior wall surface, please use the exterior wall to renovate putty base.

6. Use during the shelf life of putty.

4, putty cracking

Phenomenon: The surface of the putty is cracked after a period of construction.

cause:

1. The foundation layer is not completely dry and the construction is required. The construction requires the moisture content of the base layer to be ≤10%.

2. The bottom layer of putty is not dry, just pass the surface, the surface layer is dried first, and the inner layer is still in the process of drying, causing the degree of dry shrinkage between layers to be different and easy to crack.

3. When the base layer is treated, the joint filling and filling materials are not completely dried out, and the inner wall putty with strong hardness is applied on the top, which is easy to cause cracking;

4, the construction is too thick, the internal drying is slow, the surface drying speed is faster, it is also easy to cause cracking.

Solution:

1. The putty that has been cracked needs to be removed. If the crack is not too big, the first construction can be carried out with flexible putty, and then the construction is carried out according to the standard construction method.

2, each construction should not be too thick, the interval between the two construction must be more than 4 hours, before the putty is thoroughly dried, only after the road is applied.

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