ABOUT WONSTAR
WONSTAR the esteemed company in china established more than a decade which specialized in adhesive products, such as silicone sealant,PU foam,epoxy gap filling sealant,pvc/cpvc glue and other construction adhesives.With more than one decade development WONSTAR product is well known at china and other world countries,We stick to the principle of winning market by quality, credibility and honesty,from choosing of raw material,pre-production inspection of semi-finished product to finished product. Wonstar make great efforts in the whole production process .Because of our accuracy,quality and honesty we win customer heart and we develop well with our lots of customers around the world.We get more confident from our customers and their kind support.We continue our research and experiments for new products and we will bring always new page of adhesive
Low Modulus Construction Polyurethane Joint Sealant
Product Description:
1. Characteristics:
BU SEAL 8518 is a low modulus one-component moisture curable polyurethane sealant. It is non sagging with good strength and elasticity. It can be applied to high movement areas.
2. Uses:
BU SEAL 8518 is used as a general purpose sealant for sealing joints in building construction such as movement and construction joints in concrete, such as airfield pavements, bridge runway ,brick, wood, metal and etc.
3.Features:
One component, easy to use;Non sagging;Good adhesion to wide range of substrates;Primerless for most substrates;Excellent elasticity and resistant to high movement area.
4.TDS informations:
| |
|
|
Items |
Unit |
Data |
| 1 |
|
Color |
|
Black, White, Grey |
| 2 |
|
Non-sag properties |
|
Good |
| 4 |
|
Appearance |
|
Uniform paste |
| 5 |
|
Density |
g/ cm3 |
1.35±0.05 |
| 6 |
|
Tack-free time |
min |
~50 |
| 7 |
|
Curing rate |
mm/24hr |
>3 |
| 8 |
|
Movement capability |
% |
25 |
| 9 |
|
Shore A hardness |
|
30±5 |
| 10 |
|
Tensile strength |
Mpa |
>2 |
| 11 |
|
Elongation at Break |
% |
≥700 |
| 12 |
|
Tear strength |
MPa |
>6 |
| 13 |
|
Application temperature |
°C |
>-5 |
| 14 |
|
Service temperature |
°C |
-40 |
Typical properties after seven days cure at 25°C and 50% RH.
5. Applications:
1) Joint Design
Correct joint design can assure the lifetime of buildings and sealants. To keep the flexibility of the joints, the minimum width of the joints is 5mm. The depth is 1/2 of the width. The recommended width of the joint is 80-100% of the width if the width is less than 10mm.
In order to assure the designed movement capability of the sealant, we should use back lining. Recommended depth of the joint is no less than 5mm.
2) Surface Treatment
The surface should be clean and dry. The concrete placement should be dried for 28 days.
After rainfall, it should be aired for 2-3 days. The water content of the substrates should be lower than 9%. Dryness and cleanness can assure the bonding strength to the substrates.
The surface should be clean without dust, oil or loose layers. Metal surface should be of no oil, rusty stains. If the surface is with cladding material or protective layer, we suggest test the sample.
3) Applying the sealant
Use the brush to clear the surface to make the joint achieve the above requirement.
For good appearance, adhesive tape can be used to paste on two sides of the joint. The edges of the tape should be even with the joint edges.
Pierce the nozzle with an appropriate size at 45°angle. Put the sealant into an applicator gun and squeeze the trigger uniformly into the joint. The sealant should be filled into the joint and overflow a bit in order to avoid hollow space in the sealant.
4) Appearance Treatment
Use the scraper and moisten a bit water to press and scrape flat the surface of the sealant. Take off the adhesive tape. Do not touch the surface of the sealant before within its tack-free time.
5) Packaging:
310ml cartridge, 12pcs/carton
600ml sausage, 20pcs/carton
6). Storage and shelf life:
The shelf life of polyurethane sealant is related to the temperature and humidity of the environment. The recommended storage temperature is 5-25°C, humidity is <50% RH. It is strictly prohibited that the transportation or storage temperature is over 30°C or the humidity is over 80% RH. When stored at the recommended conditions in original, unopened containers, this product has a shelf life of 9 months.
Company informations:
| Company Name: |
Yiyang Wonstar Building Material Co.,Ltd |
| Year Established: |
2011 |
| Products: |
Silicone Sealant, Polyurethane Foam, PU sealant,PVC/CPVC Glue |
| Markets: |
Middle East, Africa, EU, America, South East Asia,etc |
| Factory Location: |
shandong, China |
| Staff No.: |
Over 100 |
| Platform: |
Alibaba, Made in China, Official Website, Canton Fair and Abroad Fair,etc |
| Ability: |
20-25 containers a month. |
| Experience: |
More than 9 years. |
| Advantage: |
High reputation among our customers worldwide all these years on products stable qualities, best reasonable prices and professional, patient services. |
FAQ
1. Can you send sample to us?
Yes, we can send free sample to you to check and confirm the quality before order.
2. Can you do our private design?
Yes and warmly welcome, we would like to do the help.
3. Where is the port?
Tianjin.
4.Can you provide with us about your customers information for ref.?
Yes for the customers who agreed, warmly welcome to check our company reputation
and sample collection.
5. How many days do you produce one 20' container?
Maxinum 15 days.
6. Can we visit the factory?
Yes, warmly welcome at any time to evaluate our factory and talk face to face.
7. Documents?
Packing list, commercial invoice, CO / FORM E / FORM A , BL making according to your demand.
Audited Supplier 
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