PU Sealants

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What are Sealants?

Sealants are practically safeguarding and valuable grouting equipment. They are flexible and have a movement capacity of 25 percent as per the requirement. The central use of it is in sealing gaps and filling gaps so that air and water can be restrained to affect the buildings' joints. It is also used to increase the aesthetics of the building. There are two types of glues: silicone and polyurethane joint sealant, available in the market. Though that has many familiar facets, there are still a lot of differences too. 

Fundamental Disparities Between Silicone and PU Adhesives

The fundamental difference between silicon and PU adhesive is in the chemical status. Silicone is an inorganic element, while the Polyurethane expansion joint sealant is an organic material. Polyurethane has specific properties like hardness, thixotropy, adhesion, and flexibility, which can be altered accordingly, as and when required. The adhesive power and mechanical stability can be improved in comparison to silicon. 

What is a Polyurethane Sealant?

Polyurethane glue is a urethane-based one part elastomer which fixes at room temperature. It is mostly applied for assembling and sealing different appliances and areas. Being a fixing material, it is often referred to as gummy cement or gluey polyurethane paste. Due to its elasticity, it is resistant to vibrations. The attractive part is that it can be utilized to develop and assemble numerous materials having discrete coefficients. 

Characteristics of PU Cement

• It can be used on a wide range of applications.
• It can be used on uneven surfaces as it's adhesive power is more.
• It can be used in place of nails and screws.
• It has a very good initial grab, which is very useful and lasts long. 
• It does not attack polystyrene.

Life period

It can be used for twelve months from the manufacturing date that to in an unopened condition. It should be stored in the packed state in a cold and arid place between +5°C and +25°C.

Substrates

It can be used on all types of surfaces, excluding PS, PP, and PE surfaces. The surface should mandatorily be free from grease and must be clean, dry, and free from dust. However, a compatibility test is always recommended before using it. 

Safety Recommendations

• While using Polyurethane adhesives pertain to conventional industrial hygiene. 
• Try to conduct the work in an excellent ventilated area.
• Never smoke at the place you are working. 
• If you find that the work area is not adequately ventilated, keep sufficient arrangements for breathing equipment. 
• Read through the label of the product thoroughly before using it.

Application 

It can be used for adhesion in the plinths, wall panels, plasterboard, polystyrene, coming, skirting boards, ceramic tiles, and porous and nonporous surfaces. As it can fill gaps very quickly, it can also be utilized in any uneven surfaces. 

PU Sealants for Sealing

The pastes which have a Shore A hardness up to 45 are used to join prefabricated materials for buildings like the joints of rainwater pipes and roofs and rain gutters. It is also used to secure joints that exist in the middle of precast blocks of concrete. It is also used to seal the junctions of aluminum outlets in the ventilating area.  

Main Areas of usage

• Isolation joints
• Gutters
• Roofing
• Foundation
• Expansion and joints control

The Polyurethane pastes used for sealing are available in the market under the following names

1. Polyurethane cement
2. Polyurethane construction cement
3. Non-staining Polyurethane glues
4. UV resistant Polyurethane glues
5. Bubble free polyurethane bonds

PU Sealants for Bonding

The pastes which have Shore A hardness more than 45 or above are used for bonding. They are of low flexibility with high surface sticking ability. They are commonly used in the automotive industry, which manufactures vehicles like repairing the auto glass, sealing metal structures, including containers and trucks. They are also used as a bonding material in fitting Air conditioners. 

Main Areas of usage

• Floor bonding
• Structural bonding
• Seam sealing
• FRP bonding
• Stretch panel bonding
• Bus, AC, and roof sealing
• Windscreen and rear screen bonding
• Rain channel fitting
• Window outer sealing

The Polyurethane pastes used for bonding are available in the market under the subsequent names:

1. Polyurethane gummy paste
2. Extra strong polyurethane paste
3. Premium polyurethane foam
4. PU metal cement
5. PU glass glue

PU Mastic Sealants

They are used for joint sealing, both internal and external and are primarily utilized as their produce is excellent. They are used to seal many ordinary constructions like fiberglass and metals. They also have a perfect tightness towards the water. Retaining the elasticity permanently in all-weather and temperature is one of the significant advantages of these materials, making it ideal for sealing appliances in commercial and industrial vehicles, trains, trucks, mobile homes, motor homes, and caravans motorcycles.

Features 

• As it is one-part moisture remedying technique, it does not require any mixing.
• It can endure any high vibration. Even it has high flexibility with outstanding tear and friction grinding.
•  It has an adaptable fastening ability that can mix in any substrates like concrete, wood, metal, and stone.
• It can be used to fix a broad range of joints as it has a high gap-filling ability.
• It can be painted easily.
• It can resist chemicals and harsh environments very quickly.

The polyurethane fills gaps between plastic and rubber as well as it is resistant to friction. This makes it dependable and demandable. It is even resistant to oil and chemicals. They are handy to fix joints fashionably. They are affordable too. They are available broadly on McCoy Mart at affordable prices. Buy the best polyurethane concrete joint sealant from us anytime and get proper products on time.