Manufactured through the reaction of glycol and an isocyanate, polyurethane is an organic compound with particularly good moisture- and corrosion-resistance characteristics. Polyurethane sealant is useful in both industrial and commercial applications. Additionally, polyurethane is often used as a heavy-duty adhesive, as well as a coating. It is used on wood, masonry, concrete and steel, polyurethane sealant waterproofs joints and surfaces while also adding protection against scuffing. While the original polyurethane sealants were hydrocarbon-based, a new generation of aqueous, latex-based polyurethane products are now available in stores.

Adhesion

Polyurethane sealant will adhere to almost any building material, so long as the surface has first been thoroughly cleaned of dust, sealant, loose cement, paint, water and any other solvents. However, for certain metals or sealant formulas, you may need to first apply a primer onto the surface. In this case, be sure to use only the primer specified on the sealant's printed instructions.

Durability

In general, polyurethane demonstrates far more elasticity than other sealant materials. This allows the solid polyurethane to distribute the force from a collision throughout its entire mass, which lowers the net force at the site of impact. Accordingly, polyurethane tends to retain fewer permanent scuffs or marks.Elasticity also allows polyurethane to better withstａnd seasonal temperature changes. Like most sealants, polyurethane expands when its temperature rises and shrinks when its temperature decreases. However, because polyurethane is so elastic, the tension from repeated expansion and shrinkage doesn't cause it to crack.

Waterproof

As an organic, rubberlike compound, polyurethane naturally repels liquid water. Similarly, polyurethane sealant effectively resists corrosion from both acidic and alkaline environments. At the microscopic level, polyurethane's nonporous structure also acts as a barrier against water vapor, i.e., humidity. Chemistry"Polyurethane" is actually an umbrella term used to describe any polymer linked together by a carbamate group—"N-(C=O)-O"—between each monomer unit. These carbamate linkages are formed by reacting an isocyanate (i.e., an organic molecule with multiple N=C=O functional groups) and a polylol (i.e., a monomer with two or more hydroxyl groups) in the presence of a catalyst. Water molecules (H2O) are formed as a byproduct of this reaction as well. The specific properties (ａnd subsequent applications) of a particular sealant arise from the type(s) of isocyanate and polylol compounds used. In fact, many sealant formulas use a mixture of different isocyanates.

Direction

1. The bonding surface to be treated should be perfectly clean, dry and free from dust, oil and rust.

2. The best application temperature is 5~35℃ and humidity 50~75%Rh.

3. Use a primer when required, apply the sealant in a continuous and even bead. Assemble parts immediately and remove extravasation.

Storages:

5~25℃, in air seasoning place and dry conditions 12 months

Item No.	Color	Surface Curing	Density	Hardness	Strength of	Elongation	Temperature
Item No.	Color	Time(MIN)	g/cm³	Shore A	Extension(MPA)	at Break	Range(℃)
8801	white	40	1.35	48	2.8	350%	-40~+120
8802	white/black	40	1.3	51	3.5	420%	-40~+120
8803	Black	40	1.25	51	6.2	430%	-40~+120

Package Standard:

300ml/pc, 25pcs/carton

8801:

One component, Room temperature moisture curing

White Paste, Low Odor, No Corrosion, Strong Adhesive, Anti-Aging, Vibration Resist

Applications：

Bonding or sealing of all kinds of vehicle body sheet metal

8802:

One component, Room temperature moisture curing

White or black Paste, Low Odor, No Corrosion, Strong Adhesive, Anti-Aging, Vibration Resist

Applications:

Bonding or sealing of all kinds of vehicle windshield or window glass, mostly used in aftermarket

8803:

One component, Room temperature moisture curing

Black Paste, Low Odor, No Corrosion, Strong Adhesive, Anti-Aging, Vibration Resist

Applications:

Bonding or sealing of all kinds of vehicle windshield or window glass, used in OEM market, need the primer.

PU sealant Primer:

Black, Room Temperature volatile liquid

Improve the bonding performance of PU sealant which is used for bonding or sealing the glass or ceramic

Can treat the surface of some metal

Package: 250ml/pot

　　Established by Guangzhou Mechanical Engineering Research Institute Co., Ltd. (51% share, hereinafter to be referred as GMERI) and Morgan Construction Co., Worcester, MA, U.S.A. (49%, hereinafter to be referred as Morgan, Worcester) in 2006, Guangzhou Morgan seals Company Ltd. is a professional manufacturer for sealing products. Combined the rich seals research and production experience of GMERI with the advanced technology and administration of Morgan, Worcester, the joint venture is renowned for its modern production lines, persisting research & development, strict quality control, quality sales and after-sales service. Guangzhou Mechanical Engineering Research Institute (GMERI) has been established since the year of 1959, and is a comprehensive first grade research institute directly under the former Ministry of Machinery Industry. GMERI is the expert in seals and lubrication field. It has won awards as scientific research achievements for more than 1000 projects and over 200 of them won scientific and technological progress prizes of municipal, provincial, ministerial and national levels. At the same time, GMERI also has one National Certified Laboratory, one National Engineering Research Centers and three Industry Level Inspection Centers.