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Exterior Water Resistant MS Sealant Expansion Joint Mastic Sealants

Basic Information
Place of Origin: Guangzhou, China
Brand Name: BAIYUN
Certification: ASTMC920 Class25
Model Number: SMP651
Minimum Order Quantity: Cartridge / Sausage Packaging 1000PCS
Price: Negotiation
Packaging Details: 300ml Cartridge package/590ml Sausage package
Delivery Time: 7-14days
Payment Terms: L/C, T/T
Supply Ability: 1000000PCS/month
Detail Information
Material: Silane Modified Polyther MS Sealant Standard: ASTM C920 Class25
Joint Movement: ±25% Key Feature: Low Modulus
Function: Sealing Precast Cement Joint, Concrete Joint Shelf Life: 12 Months
High Light:

Expansion Joint Mastic Sealants


Water Resistant MS Sealant


Exterior MS Sealant

Product Description

BAIYUN® SMP651 ms sealant eco friendly ms sealant for interior exterior joint sealing good water resistant ms sealant


BAIYUN® SMP651 Silane Modifed Polyther Sealant

For Precast building

Product description

SMP651 silane modified polyether sealant for precast concrete building is a low or mid modulus, neutral, elastic, single component sealant, which has many applications in precast concrete building fields, including joint or crack sealing, construction material bonding , etc.. It is environmental friendly without hazardous or harmful substance, and has excellent adhesion to most construction or synthetic materials without primes, such as aluminum, steel, marble, granite, concrete, PVC, PC, PA etc..

Exterior Water Resistant MS Sealant Expansion Joint Mastic Sealants 0


Environmental friendly: low VOC, nonpoisonous, no staining or corrosion to substrate.

Paintable: can be painted with most coatings, outstanding compatibility.

Excellent workability: single component, good extrusion between 4~40℃, very easy to tool.

Outstanding adhesion: bond to most construction materials without primes.

Movement Capability:±25%, exhibit stable performances during normal shape change from stretch and shearing of joint inside the constructions.

Excellent physical properties: Excellent weather resistance, excellent resistance to aging.


Fields of applications

Sealing of building joints or cracks ;

Adhesion of most construction materials without primes, including aluminum, steel, wood, granite, marble, concrete, cement, PVC, Precast, PA.

Any other suitable applications in construction fields.


Technical characteristics

Property Result Test method
Color White, black, grey  
Curing System Moisture cure  
Service Temperature(℃) -40~80  
Tack-free time(min) 120~180



Curing Rate(mm/24hr) 3  
Specific Gravity(g/cm3) 1.40~1.60 GB/T 13477-2002
Durometer Hardness(Shore A) 20~40 ISO 7619-1: 2004
Tensile Adhesion Strength(MPa) 1.0 ISO 37: 2005
Elongation at break(%) 500 ISO 37: 2005
Joint Movement Capacity(%) ±25 ASTM C920
Shelf Life(month) 12  


Product limitation

SMP651 silane modified polyether sealant for precast concrete building should not be used, applied or not recommended :

· In conditions above 80℃.

· In structural glazing applications.

· In totally confined spaces as the sealant requires atmospheric moisture for cure.

· In applications for immersion or always wet conditions.

· On substrates that can extrude grease, plasticizer or solvent.

· On substrates made of polypropylene, polyethylene and polytetrafluoroethylene.


Technical services

Complete technical data and adhesion/compatibility tests are available from Guangzhou Baiyun Chemical Industry CO., LTD.

Staining test service is also provided for clients. Clients can send the substrates to us by mail (or other ways), then we will carry out the staining test and give the test report.


Storage and shelf life

At least 12 months from date of manufacture when stored unopened in a cool, dry place within the temperature below 27℃ and out of direct sunlight.


Guangzhou Baiyun Chemical Industry CO., LTD. has passed ISO9001/ISO14001 /OHSAS18001 management system authentications, and manufacture products strictly according to ISO9001 quality management system requirements.



Repairs should not be needed in ordinary situations. If sealant is damaged and needs repairs, please remove damaged parts and clean surfaces with isopropyl alcohol, then seal the damaged region with this product. SMP651 silane modified polyether sealant can firmly bond to cured silane modified polyether sealant.

Purchasing channels

Customers are recommended to purchase SMP Sealant for precast concrete building from Guangzhou Baiyun Chemical Industry CO., LTD. or local distributors we authorized.



BAIYUN SMP651 silane modified polyether sealant is available in 590 ml foil sausage packs.

Exterior Water Resistant MS Sealant Expansion Joint Mastic Sealants 1



Available in white, black, gray or other colors on request.


Directions for use

Before embarking on any work involving SMP651 silane modified polyether sealant for precast concrete building, the safety data sheet should be carefully studied by those carrying out the work.

1. All surfaces must be structurally sound, clean, dry and free of oil, grease, asphalt, and any loose particles.

2. Mask adjacent surfaces. Install approved backing material where necessary.

3. Cut the nozzle to the required diameter. Apply sufficient sealant into joint sides to ensure complete contact

4. Tool in 10 minutes. Remove masking immediately after tooling.

5. Keep good ventilation during construction and cure.

6. To confirm optimum adhesion on either a porous or nonporous surface, adhesion testing should always be carried out prior to the commencement of any project and be carried out at regular intervals during the project.



SMP651 silane modified polyether sealant for precast concrete building is non-hazardous when fully cured. Avoid eye contact with uncured sealant, especially children. In case of eye contact, flush eyes with water or obtain medical attention immediately.



SMP651 Sealant for industrialized housing meets or exceeds the requirements of Q/BYHG 2-2014.



The directives contained in this documentation are the result of our experiments and of our experience and have been submitted in good faith. Because of the diversity of the materials and substrates and the great number of possible applications which are out of our control, we can’t accept any responsibility for the results obtained. In every case it is recommended to carry out preliminary experiments.


Company Profiles

Guangzhou Baiyun Chemical Industry Co., Ltd. was established in 1985, which is the first silicone sealant research and production company in China. During this 36 years history, we always provide excellent silicone sealant solutions and service to our customers.

As the company's strategic business, industrial sealants have been widely used in rail transportation, lighting, power supplies,home appliances, solar industry and other fields, providing various professional system solution for bonding,sealing,heat dissipation and insulation.

Exterior Water Resistant MS Sealant Expansion Joint Mastic Sealants 2Exterior Water Resistant MS Sealant Expansion Joint Mastic Sealants 3

Contact Details
Kris Ke

Phone Number : +86 18613030819

WhatsApp : +8618613030819