PU SEALANT791

PU 791 is one-part room temperature curing polyurethane with high adhesion strength

Description
PU 791 is one-part room temperature curing polyurethane with high adhesion strength, good elasticity, aging resistant, vibration exhaustion resistant, low temperature resistant and multi coatings paint able and easy application properties.

Where to use
It is special used on bonding and sealing on the production line and in the repair shop for automotive, train, trucks like cool storage, container, like roof bonding, body panel bonding, flooring bonding and sealing and so on. It also is used for refrigerator house, ships, pipe and construction usage.

Characteristic
Fast tack free High adhesion strength
Neutral Good chemical corrosion resistance
Good water proof Paint able
One part no mixing Excellent weather proof, aging resistant property
Abrasion able Excellent noise, vibration and Impaction resistant
Damp resistant No sagging
Anti mildew
Technical Data
No
Item
Standard
Test method
1
Appearance
Black, gray, white paste
By eyes
2
Specific gravity, g/cm3
1.2±0.2
GB14683-1997
3
Hardness, Shore A
50-60
GB/T531-1999
4
Sagging
No
By eyes
5
Tack free time, Min
10-85
By touching
6
Curing rate,mm/24h
2-4
100*10*12 triangle
7
Shear strength,Mpa
≥2.0
GB/T529-1999
8
Tensile strength,Mpa
≥4.0
GB/T528-1998
9
Elongation at break,%
≥400
GB/T528-1998
10
Modulus at 100% elongation,Mpa
1.4-2.5
GB/T528-1998
11
Tear strength,Mpa
≥7.0
GB/T529-1999
12
Solid content,%
≥96
GB14683-1997

Packaging
Packing310ml aluminum cartridge,300ml, 400ml and 600ml sausage. 250kgs bulk by drum;

Storage
At 5~25 centigrade shady, dry place, 12 months of shelf life.
Technical Service
Full support for customer in Technology

Application
Surface preparation
Clean all dirty, dust, loose particles by steel brush and clean all oily things with cleaning agent. All former adhesive must be cleaned out by scraping, paring, friction, jet of strong air or suitable ways.
Priming
Commonly no need for primer. Primer could be recommended in order for best performance. If using primer, smooth priming base and no permitting primer clump and uniformly disperse to prevent any coating cumulus.
Mixture
PU 791don't need mixing and use directly.
Spreading
Spread PU 791 on base material with enough pressure and thickness not less than 1 millimeter.

Note
Full cure (dry 7 days under 20) for PU 791 should be finished before applied place permits water entering into. The adhesive surface could be painted but no recommendation for solvent based paints such as colorful enamel. If should be used, please do in site testing to prove compatibility.
No permission for wet spreading tech. NO recommendation solvent, water, cleaner or soap solution.
No permission for high chloride content disinfected area like swimming pool before consulting Zhijiang's technician.
Application temperature is between 5 and 35 .

Paint Able Property
PU 791 could be painted after dry with traditional method like epoxy or acrylic paints. The adhesive surface will take place reaction and soften if using high solvent content coating like luster enamel or high oily base coatings.
Coating should have similar tensile strength compared with adhesive in order to get best appearance and property. Painting could be processed after 24 hours if thickness of adhesive is less than 3 mm while painted after 48 hours if thickness more than 3mm.

Anti Fire
PU 791 is not easy inflammable.
Health and Safety
No contact with eye or skin. Please contact doctor or poisoning preventing center in case of poisoning. If contact with skin, clean thoroughly 15 minutes long or look for doctor.