Home Improvement Sealant Solution

In the past, when people mentioned decoration, people immediately thought of dusty scenes, the screams of hammer drills, and the knocking of wooden wedges. A high-rise building often lives in hundreds of households. When the decoration of the last one is completed, the people who live in first suffer from perennial noise and dust.
Nowadays, in the home improvement market, the application areas of adhesives are gradually expanding. Bonding, anti-mold, waterproof, a sealant can often meet a variety of needs, gradually gaining public favor.

Pustar home improvement products include anti-mold sealant, edge trimming glue, nail-free glue, wood floor bonding glue, tile glue, etc. The products are green and environmentally friendly, They have professional inspection certificates and are the best choice for home decoration sealant

Door And Window Sealant, Solutions To 10 Common Problems

1. What is the reason why the neutral transparent sealant turns yellow?

The yellowing of the neutral transparent sealant is the defect of the sealant itself, which is mainly caused by the crosslinking agent and the tackifier in the neutral sealant. The reason is that these two raw materials have “amine groups”, which are extremely easy to cause. Yellowed. In addition, if the neutral transparent sealant is used together with the acid glass sealant, it may cause the neutral sealant to turn yellow after curing. It may also be caused by the long storage time of the sealant or the reaction between the sealant and the substrate.

2. Why does the neutral porcelain white sealant turn pink? Some sealants turn back to porcelain white one week after curing?

Alcohol-based neutral sealant may have this phenomenon, which is caused by the production of raw material titanium chromium compound. The titanium chromium compound itself is red, and the porcelain white color of the sealant is the color of the titanium dioxide in the sealant. But sealant is organic, and most of the organic chemical reactions are reversible reactions, and there are side reactions. Temperature is exactly the key to causing these reactions. When the temperature is high, a positive reaction will cause the color to change, but after the temperature drops and stabilizes, the reaction proceeds in the reverse direction and restores to its original appearance. If the production technology and formula are well mastered, this phenomenon should be avoided.

3. Why does some transparent glass sealant change porcelain white color after five days after being shot out? The neutral green sealant turns porcelain white color after construction, why?

This should also be a problem in the selection and verification of sealant raw materials. Because some domestic rubbers are added with plasticizers, which are easy to volatile; while some rubbers have more reinforcing fillers, when the plasticizers evaporate, the strips are stretched due to shrinkage, and the filler color appears (all the fillers of neutral rubbers) Itself is white). Various colored sealants are added with pigments to make them into various colors. If there is a problem with the choice of pigments, the color of the sealant will change after construction; or the color sealant is too thin during construction, and the sealant is inherently small in the curing process. The shrinkage will make the color of the sealant lighter. In this case, it is recommended to maintain a certain thickness (above 3mm) when sizing.

4.Some glass sealant has a salt-like granular shape when it is shot out, and some granular shapes will automatically decompose after curing. Why?

This is a matter of choosing the raw material formula of the sealant. Because the cross-linking agent contained in some sealants will crystallize in a low temperature environment, the cross-linking agent will condense in the rubber bottle. After being punched out, you will see the granular shape of salt powder, but it slowly It will melt, so the granular shape will automatically decompose after solidification. This situation has little effect on the quality of the sealant. This situation is mainly due to the relatively large impact of low temperature.

5. Some sealant hits the glass, but the sealant hasn’t dried for 7 days. What is the reason?

This situation mostly occurs in cold weather.
(1) The sealant is too thick and the dry sealant is slow.
(2) The construction environment is affected, and the weather is bad.
(3) The sealant is out of date or there is a problem.
(4) The sealant is soft and does not feel dry.

6. What is the reason for the bubbling sound of some glass sealants when sizing?

There may be three reasons:
(1) The technology is not good enough during the dispensing, and air is mixed into the plastic bottle;
(2) Air is left in the bottle;
(3) It is not 100% silicone sealant. The added filler will react slightly with the PE soft sealant of the glass plastic packaging bottle, causing the plastic bottle to swell and increase. The air remaining in the space penetrates into the sealant. Make it create a gap, it will make a sound of bubbles when sizing. An effective way to overcome this phenomenon is to change to hard bottle packaging and pay attention to the product storage environment (in a cool place below 30°C).

7. Why is there a lot of bubbles when sealant is applied in hot weather, some neutral sealant will appear after curing at the junction of concrete and metal window frame, but some will not? Is it a quality issue? Why hasn’t a similar phenomenon appeared before?

Many brands of neutral sealant have similar phenomena, and it is confirmed by careful testing and repeated experiments that it is not a quality problem of the sealant. Because the neutral sealant has two kinds of alcohol type and ketoxime type, and the methanol contained in the alcohol type sealant will release gas during the curing process (methanol starts to volatilize at about 50 ℃), especially when it is exposed to direct sunlight or high temperature, the reaction is more intense . In addition, concrete and metal window frames are difficult to breathe. In addition, the temperature and humidity are higher in summer, and the curing will be faster. The gas released by the sealant can only escape from the uncured adhesive layer and on the cured adhesive strip. Bubbles of varying sizes will appear. The ketoxime neutral sealant will not release gas during the curing process, and will not produce bubbles. However, the disadvantage of the ketoxime neutral sealant is that once the technology and formula are not handled well, there will be a chance of shrinkage and cracking in the winter during the curing process when it is cold. If the technology is good, the formula will not have this phenomenon.

Similar phenomena did not occur in the past because in the past, construction units used very few silicone sealants in such places, and they generally used acrylic waterproof sealing materials. Therefore, the phenomenon of foaming of silicone neutral sealant is not very common; in recent years In recent years, silicone sealants have been widely used, which greatly improved the quality of the project. However, due to the lack of understanding of the material properties, improper selection of materials caused the sealant to bubble.

To solve such problems, the following points should be paid attention to:
(1) The most prudent way is to do a partial use test first to observe whether it meets the needs of use (generally, the reaction can be seen two or three days after sizing);
(2) To distinguish the use time And the type of substrate, choose the appropriate neutral sealant to use: choose ketoxime type in summer and alcohol type in winter;
(3) Keep the construction surface clean and dry;
(4) Avoid high temperature periods (above 35°C) when sizing in summer. Direct sunlight is generally appropriate in the evening.

8. How to do compatibility test?

Strictly speaking, the compatibility test between the adhesive and the building base material should be carried out by the nationally recognized building material testing department. Of course, the necessary engineering must be the inspection report of the national authoritative testing agency. In order to determine whether to use a certain building material product, the general engineering can provide the substrate to the glass sealant manufacturer for compatibility testing. The test result can be obtained in about 45 days for structural sealant, and 35 days for neutral sealant and acid sealant. The simplest and quickest way is that the user can test the glass sealant on a small amount of substrates. After it is completely cured, observe the surface effect and test its peel strength by hand, so as to simply determine whether the glass sealant product’s adhesion, tension, etc. Meet the needs of use.

9. Why does the acid sealant fall off easily when used on cement?

This is actually one of the most basic problems in the application of glass sealant. Acid sealant produces acetic acid when it is solidified, which will react with the surface of alkaline materials such as cement, marble, granite, etc. to form a chalky substance, which causes it to fall off.

10. Why is the glass sealant applied on the back of the mirror, and after a period of time, mottling or sealant marks appear on the mirror surface?

Mirrors on the market usually have three different back coatings: mercury, sterling silver and copper. Freckles appear on the mirror surface of common mirrors after applying sealant for a period of time. In this case, the user has used acid glass sealant, and acid glass sealant usually reacts with the above materials, causing the mirror surface to see mottling. Therefore, we emphasize that neutral sealant should be used, and neutral sealant is divided into two types: alcohol type and ketoxime type. If the copper base mirror uses ketoxime neutral sealant, the ketoxime will slightly corrode the copper material. After a period of construction, you can see the traces of corrosion on the back sizing part of the mirror. If you switch to alcohol type neutral sealant This phenomenon will not occur. All of the above are improper selection of materials due to the diversity of substrates. Therefore, it is recommended that users do a compatibility test before using the sealant to see if the sealant is compatible with the material. Use appropriate glass sealant products to avoid unnecessary losses.

Sealing And Waterproofing Solutions For Construction Engineering

The selection of sealant products is an important step in the construction of engineering projects related to sealing and waterproofing, from indoor to outdoor, from ground to underground, from residential to commercial projects. Pustar is committed to providing you with a total solution of adhesives for construction projects.

Our construction products include polyurethane, silane-modified polymer, silicone, and SPU. Application areas include PC prefabricated buildings, subway tunnels, and traditional construction projects.

Stable quality, cost-effective price, quick response team, reasonable delivery cycle,Designed to be your trusted sealant partner

Automotive OE Manufacturer Service Plan

1. Excellent service team

The service team members of Purstar Auto OEM have brought together outstanding talents in the industry. Many of them have served Guangzhou Automobile Toyota, Dongfeng Honda, Nissan, FAW, SAIC, Haima Automobile, BYD, Cheetah Automobile, Changan Ford and other automobile companies. Has a wealth of team service experience and large customer service capabilities.

2. Service process

3. Service content

① Trial evaluation:

Help customers do compatibility testing of new and old products, evaluate the possible impact of old products remaining in the pipeline on new products, and provide a full range of solutions.

② Trial training:

Before the product is used, conduct professional training for the sizing operator, and focus on the operation of the process of replacing the plastic bucket to avoid problems such as gel and air bubbles caused by improper operation.

③Follow-up service:

The company dispatches after-sales service engineers to follow up the service, and adjust the relevant parameters of the product itself under the operation of the specific gluing equipment to ensure that the customer’s products and processes can operate more efficiently.

④ Regular return visits:

During the service period, we will visit customers regularly to understand the use of the product, and provide reasonable improvement measures based on the on-site use feedback to ensure that the product achieves continuous stability in use.

⑤Glue report:

For occasional abnormal situations, the company immediately initiates emergency response measures and factory self-inspection procedures, and dispatches after-sales service personnel to the site to coordinate treatment as quickly as possible, investigate the actual situation on the spot, and verify the cause of the abnormality on the spot based on the current situation And experimental analysis, make an abnormal analysis report to the customer, and follow up the follow-up matters.

Automotive Aftermarket Sealed Adhesive Solution


With the development of the automobile industry and the improvement of people’s living standards, the number of car ownership and sales have continued to grow steadily. As the preferred transportation tool for travel, automobiles have increasingly strict requirements on the safety and sealing of automobile window glass. Therefore, it is a very important project to choose a suitable automotive glass bonding sealant. The main function of automobile glass is to play a protective role: improve the safety performance of the whole vehicle, ensure the safety of the people in the car, and prevent the car from being damaged due to the weak bonding of the glass when the car is braking or crashing at high speed.Automobile glass includes front and rear windshields, side windshields, and sunroofs of cars, trucks, and buses. According to the nature of use, it can be divided into the complete vehicle supporting market and the after-sales maintenance market.

Pustar focuses on the research and development, production and sales of sealant products. It has certain technology and experience accumulation in automotive glass bonding and sealing systems, and also includes body welds, sheet metal, and roof seals.

Automotive front and rear windshield bonding has high-strength, medium-high-strength, fast bonding products,

Glass, sheet metal, car body, etc. are sealed with weather-resistant, odorless, environmentally friendly, yellow-resistant, convenient construction and other series of products.

The after-sales maintenance market has a series of products such as general-purpose type, low-odor type, and drive away quickly type.

There are mature product packages and system solutions for the after-sales maintenance market.Before sales, fully understand the customer’s glue point construction process, assembly process, construction environment, temperature and other information, do a set of preliminary tests according to customer standards or requirements, and provide appropriate product recommendations. And has a professional and strong R&D team and technical support team to design reasonable bonding and sealing solutions, construction techniques and supporting products for customers to solve customers’ application problems and process difficulties.

In the process of product introduction, a series of professional services such as strong technical support and necessary on-site guidance and construction training are provided.