PU SEALANT

   
DescriptionPU 881 is one-part room temperature curing polyurethane adhesive with good adhesion property. It reacts with moisture in the air to form a kind of elstomer with high strength, aging resistant, vibration exhaustion resistant, low temperature resistant and corrosive resistant properties. Where to useDirect glazing and sealing for windshield glazing, glass fiber reinforced plastic fittings, installation in automotive, accessory, auto steel and aluminum board. CharacteristicFast tack free               High adhesion strength        Neutral                      Good chemical corrosion resistance         Good water proof          Paint ableOne part no mixing        excellent weather proof, aging resistant propertyAbrasion able              excellent noise, vibration and Impaction resistant Damp resistant            No sagging        Anti mildewTechnical Data
No
Item
Standard
Test result
Test method1
Appearance
Black
Black, paste
By eyes2
Tack free time, Min
20-60
40
Touch 3
Curing rate,mm/24h
¡Ý3
3.0
100*10*12triangle4
Solid content,%
¡Ý96
98.1
GB14683-19975
Specific gravity, g/cm3
1.2¡À0.1
1.3
GB14683-19976
Hardness, Shore A 
55¡À5
58
GB/T531-19977
Tensile strength, Mpa
8¡À1.0
7.5
GB/T528-19988
Elongation at break,%
¡Ý500
520
GB/T528-19989
Shear strength, Mpa
¡Ý4.0
5.1
GB/T7124-198610
Tear strength, N/mm
¡Ý20
26.8
GB/T529-1999 Packaging310ml aluminum cartridge,300ml, 400ml and 600ml sausage. 250kgs bulk by drum; StorageAt 5~25 centigrade shady, dry place, 12 months of shelf life. Technical ServiceFull support for customer in Technology ApplicationSurface preparationClean 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.  PrimingPrimers may be required to achieve optimal adhesion. Smooth priming base and no permitting primer clump and uniformly disperse to prevent any coating cumulus. MixturePU 881 don't need mixing and use directly.Spreading Spread PU 881 on base material with enough pressure and thickness not less than 1 millimeter. NoteFull cure (dry 7 days under 20) for PU 881 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 PropertyPU 881 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 881 is not easy inflammable.Health and SafetyNo 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.