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JS-903LM
MS sealant for pipe gallery

JS-903LM low modulus MS sealant is a high-quality, two component, paintable, and pollution resistant neutral modified sealant based on silane modified polyether polymers. This product does not contain solvents and is pollution-free to the environment. At the same time, it can produce superior adhesion to most building materials.

Product features

〔1〕 Environmental protection products: solvent-free, PVC free, isocyanate free, non-toxic, odorless, pollution-free, and fast curing;

〔2〕 Surface Applicability: Compatible with most industrial paints, it can be sprayed after surface drying, which does not affect the curing rate:

〔3〕 Easy to use: excellent thixotropy and extrudability, wide temperature range.

〔4〕 Good adhesion: Excellent adhesion performance for most building materials such as stone, aluminum, ceramics, prefabricated concrete components (PC board), cement fiber board, etc; No pollution to porous substances.

〔5〕 Excellent weather resistance, aging performance, long-term superior tensile, compressive, and shear stress traceability, while the good weather resistance of the sealant ensures the durability of the seal

And excellent waterproof performance;

〔6〕 Neutral curing, non corrosive to building materials such as aluminum, steel, stone, prefabricated concrete components (PC board), and cement fiber board, overcoming the disadvantage of ordinary silicone adhesive that easily contaminates the substrate.

Product parameters
Model   JS-903LM  
Technical indicators     Lnspection standards
Appearance Component A Paste like  
Component B Paste like  
Component C Unconventional color selection  
Color Black, white, gray, etc    
Mixing ratio A:B:C=100:8:3    
Curing method Moisture cure    
Density(g/cm³) 1.25±0.1   GB/T 13477.2-2003
Non volatile matter% ≥99.5   GB/T 2793-1995
Sag(mm) ≤2   GB/T 13477.6-2003
Surface drying time(mins) 60-240   GB/T 13477.5-2003
Curing speed(mm/24h) Fully cured    
Curing time (humidity 50 ± 5%, temperature 23 ± 2 ℃) 3-14 days
The product is cured at a humidity of 50 ± 5% and a temperature of 23 ± 2 ℃ for 14 days:
Hardness, Shore A ≤30   GB/T531.1-2008
Constant elongation adhesion100% No damage   GB/T 13477.8-2017
Elastic recovery rate ≥85   GB/T 13477.17-2017
Pollution No Pollution   JC/T881-2001附录A
Color and packaging

JS-903LM low modulus MS sealant is provided to customers in a net capacity 4L iron bucket packaging, where the mass ratio of component A (base material), component B (curing agent), and component C (pigment) is 100:8:3; The pigment is an optional product. JS-903LM low modulus MS sealant is available in three standard colors: black, white, and gray. Other colors can also be provided according to customer needs. The conventional appearance of JS-903LM low modulus MS sealant is fine, glossy, and without obvious particles. At the same time, it can provide a frosted appearance according to customer needs.

Storage and expiration date

JS-903LM low modulus MS sealant is packaged in a dry and ventilated environment with a temperature of 27 ℃ or lower. The product has a shelf life of 12 months from the date of production

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