RE: Chống ồn, nên dán hay nên xịt?
Đây ạ, các bác chú ý phần bôi đen.
Tài liệu standard về technical:
3M™ Underseal™ Rubberized Undercoating Black
Data Sheet
3M Part No.(s) 3M Part Descriptor(s)
08883 3M™ Underseal™ Rubberized Undercoating Black
3M Fax on Demand Identification Number: 08883
Description
A 3M undercoating with corrosion protection, paintability, excellent spray pattern and coverage, and
sound deadening qualities. This is the premium 3M undercoating in an aersol can.
Features, Advantages, Benefits
Features
Medium to coarse texture
Good sprayability and coverage
Excellent corrosion and abrasion resistance
Advantages
Able to OEM match many undercoating appearances
Easy to quickly obtain consistent coating appeance
Coatings holds up over time
Benefits
Customer satisfied with finished appearance
Less time spent reworking poor sprayed appearance
Reduce comebacks for abrasion and corrosion
Typical Physical Properties
Container 24 oz. aerosol can
Base: Synthetic polymer (GỐC CỦA NÓ LÀ POLYME TỔNG HỢP)
Density lbs/Gallon (Appx.) 7.1
Color Black
Flash Point - °F -50°F
Viscosity (CPS) Brookfield
Viscometer
RVF #4 @ 20 RPM
Solids Content (Appx.) 44%
Consistency Heavy, black liquid in aerosol
Service Temperature - °F -30 to 180 deg F
Solvent Naphtha, toluene
Propellant Propane
Product UsesProvides hiding power, abrasion resistance, corrosion protection and sound deadening to:
Automotive undercarriages
Wheel wells
Inside body panels (such as quarter panels)
Door skins
Trunks
Floor pans
Other automotive applications to perform the tasks mentioned above
Performance Properties
Test Condition Result
Sag Resistance 20 mil Thickness No Flow
Salt Resistance 500 Hours Exposure 5% Salt No Corrosion
Water Immersion 500 Hours @ 75°F No Corrosion
Abrasion Resistance 1 Pint Gravel @ 90 PSI Excellent
Adhesion to Metal After 2 Days @ 75°F Excellent
Dry Rate 1 Coat @ 75°F Tack Free in 15 Minutes
Product is paintable, but can slightly discolor some light colored paints. For very best paintability, use
08964 or 08804.
Handling and Application Information
Directions for Use
1. Product can be applied over bare metal or primer.
2. Clean and dry surface with soap and water, then with 3M™ General Purpose Adhesive Cleaner, PN08984.
3. Shake can thoroughly for 1 minute after the agitator ball begins to move.
4. Apply in relatively light coats, allowing for the solvent to evaporate somewhat between coats (3-5
minutes). Build to desired thickness.
5. Dry time is typically 30 minutes at room temperature. Thicker applications may take longer to dry.
6. Product can be painted after 30 minutes (best to wait 1 hour). If waiting longer than 24 hours, scuff
lightly before painting.
7. Always invert can and purge nozzle after use, to insure sprayability the next time.
* If 'Directions for Use' reference P.N.'s 08984, 08986, or 08987, please read. Federal and local air quality regulations may regulate
or prohibit the use of surface preparation and cleanup solvents based on VOC content. Consult your local and Federal air quality
regulations for information. When using solvents, use in a well ventilated area. Extinguish all sources of ignition in the work area
and observe precautionary measures for handling these materials. Refer to product label and MSDS for P.N. 8984, 8986, or 8987
for detailed precautionary information.
Applications
Provides hiding power, abrasion resistance, corrosion protection and sound deadening to:
Automotive undercarriages
Wheel wells
Inside body panels (such as quarter panels)
Door skins
Trunks
Floor pans
Other automotive applications for the tasks mentioned above
