JS-312 is one-component, room temperature curing polyurethane sealant with good adhesive property. It has many advantages such as high strength, good elasticity, aging resistant, vibration exhaustion resistant, low temperature resistant, paintable and convenient to use, etc.
Bonding and sealing for the joints in automobiles, railway trains, refrigerator cars, containers, cold storages, ships, pipelines and buildings.
a. Fast curing under room temperature , no sagging, solvent free
b. High adhesive strength, wide application range for base materials
c. Good chemical and water resistance
d. Excellent aging resistance
e. Excellent noise, vibration and impaction resistance
f. Good damp resistance and anti mildew
g. Paintable, abrasionable
Grey, White paste
Hardness, Shore A
Solid content, %
Tack free time, Min
Curing rate, mm/24h
Shear strength, Mpa
Tensile strength, Mpa
Elongation at break,%
Tensile strength at 100%, Mpa
Tear strength, N/mm
400ml and 600ml sausage.
At 5℃~25℃ shady, dry place, 6 months of storage time.
Full support for customer in technology
Clean all dust, loose particles, greasy dirt and water with gauze or other cleaning tools. Corrosion sites should be removed by metal brush and then use acetone or alcohol to clean the surface. All former sealant should be cleaned by scraping, paring, friction, jet of strong air or suitable ways.
Primers & activators
In general, no primers and/or activators are recommended when using JS-312. In order to obtain the best adhesive performance, corresponding primer and activator should be used. When applying, uniformly disperse primer and activator, avoid primer or activator clump and uncover of base materials.
JS-312 doesn’t need mixing and can be used directly.
Spread JS-312 on base materials with glue gun, suggesting thickness of sealant is no less then 1 mm, best 3~5 mm.
Recommended application conditions are under temperatures of 15-35 ℃ and relative humidity of 50%-75%. If the ambient temperature is low, and the glue speed does not meet the process requirements, sealants are recommended to be heated in 50-60 ℃ oven for 30-60 minutes.
Full cure (dry 7 days under 20℃) for JS-312 should be finished before applied to water immersion places.
The sealant surface can be painted but solvent based paints such as colorful enamel may be incompatible. If used, in site testing should be done to ensure the compatibility.
No permission for wet spreading technology. Solvent, water, activator and/or soap solution is not suggested.
No permission for using in high chloride content disinfected area like swimming pool before consulting technician of Zhijiang.
JS-312 can be painted with traditional methods like epoxy or acrylic coatings when cured. If high solvent content coatings like luster enamel or high oily base coatings are used, reaction will take place at the surface of sealants, which will soften the sealant surface.
The tensile strength of coating should close to sealant in order to achieve the best appearance and property. Painting could be processed after 24 hours if thickness of sealant is less than 3 mm or after 48 hours if thickness of sealant is more than 3 mm.
Health and Safety
JS-312 is uninflammable.
No contact with eye or skin. Please contact doctor or poisoning preventing center in case of poisoning.
If contacted with skin, take off the polluted clothes and clean thoroughly for 15 minutes or longer, then go to the doctors.
Zhijiang will sample all related materials and do testings to choose the best type of sealant and best performance to prevent any potential problems. Please ask technician of Zhijiang for more specifics.