8921u , PU sealant, for Seal bus air conditioning, weld, luggage
and other parts. Deal ships, locomo
8921U performance polyurethane sealant is a single component, W
High thixotropy, does not flow, low odor polyurethane adhesive.
Product is low viscosity, good thixotropy, which is convenient for
manual gluing. Cured adhesive is elastomers, anti cold and hot
change, good resistance to stress change performance. Can be
painted, polished, no corrosion, elevation and top construction
does not flow. There is extensive adhesion to various substrates.
Seal bus air conditioning, weld, luggage and other parts. Deal
ships, locomotives, construction, paint and other industries and
other usage of low bond strength.
Characteristic before curing
Representative value range
Color White/black/grey/iron grey
Density g/cm3(25℃) 1.30 1.25～1.35
Touch Curing(min) 50 40～60
Characteristic after curing
Tensile strength MPa 1.8 1.5 ～2.5
Elongation at break (%) 500 450 ～700
Tear strength KN/m 8 ≥7
Harness: Shore-D(GB/T 531-1999) 40 30～50
Work Temperature℃ -40～90
Instructions for use
Surface cleaning: clean surface: remove the rust, dirt, water and
Gluing: cut a small hole in the beak suitable rubber barrel, glue mouth
diameter should be considered sizing width and decide, into the
glue gun start sizing operation.
Curing: a large temperature and humidity environment on polyurethane
adhesive surface drying and curing effect, low temperature, curing
slow; temperature and humidity is too high, dry too fast. The best
operating environmental conditions: temperature 20 to 30 DEG C for
50 ~ 70%RH, humidity exceeds 5 to 35 DEG C; the temperature,
humidity 35 ~ 75%RH range please careful construction.
Polyurethane adhesive in gluing and curing process, avoid contact
with chemicals containing hydroxyl, amino and, this kind of
material will cause the polyurethane glue curing incomplete.
Storage: unused plastic blocks should be tightened immediately, to seal
the tube mouth save. Again, if sealed, a little crust, remove
immediately after, does not affect the normal use. In the process
of storage, the nozzle may also appear a few crusts, remove after
normal use, does not affect the product performance.
The matters needing attention
Keep away from children.
If you accidentally come in contact with the skin, wipe in the
curing a cloth before class, and using alcohol solvent scrubbing.
If the case of contact with eyes, rinse immediately with water, and
Recommended for use in a well ventilated place
Product safety data please refer to the product MSDS.
600ml/Soft tube 20tube/Carton
Store in cool and dry place 5-25 C (humidity less than 70% RH)
Storage period: Hard pack for 9 months
Soft pack for 6 months