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SENTINEL 909 Soybean Degreaser & Mastic Remover (5 GL)

Item #
5 Gallon Pail     Qty: 1
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  • Biodegradable, soy-based product
  • Quickly penetrates thick mastic, adhesive, and grease
  • Odorless
  • Rinses easily
  • Coverage rate: 100–200 sq ft/gal

Product Information


SENTINEL 909 Soybean Degreaser & Mastic Remover is a biodegradable, soybean-based solvent cleaner for the removal of black asphalt based mastics, yellow carpet adhesives, grease, lubricants, inks, and other petroleum-based residues. 909 is ideal for projects when a biodegradable, no-odor product is preferred.


Expect coverage rates of 100–200 sq ft per gallon.




  • Physical state: Liquid
  • Appearance: Clear
  • Color: None to amber
  • Odor: Mild Odor
  • pH: Not Applicable
  • Boiling Point: 470°F
  • Flash Point: 200°F
  • Vapor Pressure:<0.1 mm Hg@68°F
  • VOC Content: <14g/l*


* When determining VOC content in accordance with the requirements set forth by the Ozone Transport Commission (OTC), effective 01-01-2009


Application Instructions

Always follow product label instructions for best results.


Before beginning work, protect all walls, flooring, carpeting, cracks or wood with an absorbent from liquid materials. This will ensure easier clean-up and eliminate potential problems.

  1. Wet the entire adhesive surface with 909. This may be done by spraying or mopping 909 over the surface of the mastic. Allow 909 to soak and penetrate into the mastic for 40–60 minutes.
  2. Scrape or squeegee the bulk of the softened or liquefied mastic from the surface with a floor scraper (razor scraper) or floor squeegee.
  3. Reapply 909 as in step one. Agitate with a short-bristled broom, hand-held or rotating floor scrubber with stripper pads to fully lift and liquefy adhesive residue from the subfloor. The liquid may then removed with absorbent.
  4. Wash and rinse the floor thoroughly with Sentinel 805 and water to ensure a clean surface. Allow to dry a minimum of 24 hours before installing new flooring.




Directions For Use (for floor tile mastic removal):

  1. If necessary, protect walls, drains, cracks and other flooring with an absorbent (rags, kitty litter, sawdust) to keep liquefied mastic contained. 
  2. Apply enough 909 to the entire adhesive surface to completely penetrate all adhesive to be removed. Allow 909 to soak and penetrate the mastic for 40-60 minutes. 
  3. Agitate the 909 into the adhesive with a stiff, short-bristled brush or coarse stripper pad. Squeegee or scrap the softened or liquefied adhesive from the floor and absorb for disposal. 
  4. If necessary, reapply 909 and repeat steps above. 
  5. Wash and rinse floor to ensure a clean surface. Allow to dry completely. 


More Information
Brand Sentinel
Category Degreasers, Mastic Remover
Product Type Liquid
Scent Mild
Dilution RTU
Material Mastic
Application Mastic Removal
Application Method Wipe/Mop
Approved Use Mastic Removal
Condition New
Safety Data Sheet (SDS)
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