Polyurethane sealant for auto body

DESCRIPTION

Surtek 3621 is a one-component, moisture-curable, polyurethane-based, elasto-meric adhesive sealant. After curing, it provides a permanently elastic bond to fasten materials with different coefficients of expansion.  

 

ADVANTAGES

1. Good Adhesion to a wide range of substrates. 

2. Cures rapidly to a permanently elastic consistency with excellent cut and tear resistance.

3. Low odor, non-staining.

4. Surface paintable with water, oil, and rubber based coatings.  

5. Non-corrosive.

6. Provides shock resistance and vibration damping.  

7. Exhibits high recovery, making it ideal for sealing dynamically moving joints.   

8. Weather resistant.

 

Technical Data

Chemical base                       1-C polyurethane

Color                               Black, white, grey

Cure mechanism                      Moisture-curing

Density                             1.35 ± 0.05 kg/l                       

Non-sag properties                    Good

Application temperature                5°C-35°C

Tack-free time*                       40-60 min.

Curing speed*                        ≥3.5mm/24 hrs                   

Shore A hardness                      ~35

Tensile strength                       ≥1.5 N/mm2  

Shear Strength                        ~1 N/mm2

Elongation at break                    ≥450%

Tear propagation resistance              ≥6 N/ mm                            

Service temperature (permanent)          -40°C to +90°C                            

Short – term (1 day)                    120°C     

           (1hour)                   140°C

*= at 23°C and 50% relative humidity

 

 

APPLICATIONS

1. Vehicle bodies and cab construction including panels, underbody components, and roofing.  

2. Front and rear spoilers, auto trim, moldings, body seams, and welded joints.  

3. Waterproofing exterior lap seams in many applications, including truck trailers, RV's, metal roofs, window  perimeters, grain bins and HVAC units.    

4. Waterproofing rivet seams.

5. Sealing of exposed and concealed joints of aluminum, steel, coated metals, wood, roof rails, and door hinges in transport equipment.    

6. Sealing and caulking expansion joints, pre-cast concrete panel joints and joints between logs on log homes.   

 

PROCESS

Cleaning:

Clean surface with a strong jet of compressed air, sandblast, or solvent to ensure the surface being clean, dry, free of oil, grease, and of sound quality.    

Activating/Priming:

Activators and/or primers may be required to achieve optimal adhesion depending on the nature of substrates.   

Application of sealant:

Cut tip to desired shape and size. Puncture airtight seal. Install with hand or power operated gun and extrude the sealant into the joint. Clean excess sealant using hard rubber plate or finger wet with soap solution.    

 

PACKAGING

310ml cartridge, 600ml sausage

 

STORAGE AND SHELF LIFE

When stored at the recommended conditions in original, unopened containers, this product has a shelf life of 9 months.   

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. And high-temperature container transportation is prohibited as well. In the long-time high temperature and high humidity storage environment, the product is easy to get viscous, extrusion will be deteriorated and shelf life will be shortened.    

 

CAUTION

The product contains isocyanates, which may cause skin and eye irritation. Avoid eye-contacting and ingestion.   

 

NOTE

The information and recommendations related to the application and end-use of COMENS’ products are given in good faith based on COMENS’ current knowledge and experience of the products when properly stored, handled and applied under normal conditions. This information must on no account be used as a substitute for necessary prior tests which alone can ensure that a product is suitable for a given use, due to the practical differences in materials, substrates and actual site conditions. Users are requested to check that they are in possession of the latest version of this document and COMENS’ is at their disposal to supply any additional information. 

Elina

Email: elina.li@co-mens.com 

Phone: +86 186 0025 7687

Skype:lindali0607