One Component Water Swelling Sealant Manufacturer

FOB Reference Price:Get Latest Price
US $2.9-6.5 / Piece | 2000 Piece/Pieces (Min. Order)
Supply Ability:
30000 Piece/Pieces per Month
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Quick Details
Other Names:
Polyurethane Sealant Mastic
Place of Origin:
Beijing, China (Mainland)
Other Adhesives
Main Raw Material:
Waterproof Structure
Brand Name:
Model Number:
swell seal mastic
Product name:
Water swelling sealant
Swell meet with water
Packaging & Delivery
Packaging Details
600ml/bar (20 branch/box) 310ml/bar (24 teams/box)
Delivery Time
Within 10 days after receiving the payment

One Component Water Swelling Sealant


It is one-component, polyurethane,water swelling sealant


Easy operation

Excellent adhesive to different surface

Good expiation rate to protect fresh concrete during solidifying


Water swelling

Durable water sealing

Various products for different task


Applied in waterproof structure , cross section of fix water stop or LW preventive injection hose.


Construction joint

Pipeline and concrete iron in wall or cement board

Surrounding the concrete iron or joint

Inner joint of cable


Preventive injection hose: type LWRI, I and II

Cross section of water stop


Base surface must be sound, clean, dry, no oil or dust,etc.

Clean all practical, demolding agent, bleeding cement, old coating film and other loose animals.

Construction Conditions

Min+5℃ Max +35℃

Base surf. Temp.     Min+5℃ Max.+35℃

Environment Temp.    Min+5℃ Max.+35℃

Base surf. humidity    Dry and no visible water


Applied for fixing water stop or placing injection hose.

Apply the sealant on base surface, if base surface is not flat, nozzle size need to be changed.

Fix water stop and injection hose to the sealant. Concreting 2 hours after sealant solidify.

Applied for sealing of the construction joint

Clean Tools

clean all the tools and equipment when process finished 


LW swell sealant will expand some hours after water contact. It is not allowed to stay a long time in water (water draining complete in 24 hours) before concreting.

Placing  the sealant in movable crack is not allowed.

When water level rise, the sealant expand and sealed the crack.

In drying condition, the sealant shrinks to original size; but will re-expand when touching water.

Suggest to apply the sealant under less than 2 bar pressure  (test pressure is 5 bar) because of sealing width limit.

If the pressure is high than 2 bar, the sealant can be used to fix the injection hose.

Standard  DB11/581-2008

Shelf time: 12 months  (sealed packing, Temp. +5℃---+25℃, drying condition)


600 ml/bar (20 branch/box) 310 ml/bar (24 teams/box)

Company Information

As an member of Chemical Grouting Sub-Committee, Chinese Hydraulic Engineering Society, the Director Member of Waterproof Sub-Committee and China Construction Industry Association.LANGWEI Conchem is a fast growing international manufacturer of construction chemicals with plants in Beijing, China. The company is specialized in preventative and remedial waterproofing products. 
Preventative waterproofing products are wildly used during new construction and are usually installed by the general contractor. Examples are bentonite strips, hydrophilic mastics and rubbers, which swell in contact with water and hence block water ingress, injection hoses, which can be injected at a later stage to block water and finally cementitious coatings for basement waterproofing and elastomeric membranes for tanks and roofs.
Remedial waterproofing products are mostly used when major (or minor) water leaks happen at a later stage and are usually applied by specialist applicators. Remedial waterproofing products are also often used during construction of tunnels and other underground constructions to prevent infiltrating water from hindering the normal progress of the works. Examples are injection resins based on polyurethanes (both 1C and 2C) and poly-acrylates. These products are also used for soil and rock stabilization, together with organo-minerals.
LANGWEI Conchem also manufactures a series of products for the protection and repair of reinforced concrete. Examples are cementitious grouts and mortars, epoxy injection resins, carbon fibre laminates and epoxy glues.

Founded in 2004, Beijing Long Way Times Science & Technology Co., Ltd. has been committed to the research and development of new type environmentally friendly building materials as well as the innovation of service and construction process. 
Our company is the member of Chemical Grouting Sub-Committee, Chinese Hydraulic Engineering Society, the Director Member of Waterproof Sub-Committee and China Construction Industry Association. The products developed by Langwei include AC-II liquid acrylate grouting materials (Patent No.20********2.7), MMA (Methyl Methacrylate) grouting materials, permeable crystalline waterproofing materials, polyurethane grouting materials, epoxy grouting materials and water-swelling water-proofing gel. Our products are of top quality among domestic similar products.

As a ODM, we devoted ourselves  to waterproof inductry and got a lot of glories from government, we promise your requirment of the waterproof product top quality and best price is top level.



Why choose us ?

-The member of Architectural Society of China

-Best quality: LW joint sealant has been applied in the subway and hydraulic power project

-have taken excellent application effect.

-Cheapest price: factory price, send inquiry for quotation

-Good after service: guidance for your project, make sure performance well


LW Certifications



Packaging & Shipping




LangWei Conchem is specialized in preventative and remedial waterproofing products, which are mostly used in balcony waterproofing, car part decks, concrete repair and protection, facade waterproofing, flooring systems, injection equipments, packers & accessories, preventative waterproofing, remedial waterproofing, roof waterproofing, sewer rehabilitation, soil injections, tunnel applications and so on.