Broan 100 CFM 3.5 Sones 120V Bath Exhaust Fan Screws MasterSeal 590 (formerly Waterplug) is

MasterSeal 590 (formerly Waterplug) is a quick setting hydraulic cement used to instantly stop running water or seepage through holes or cracks in concrete and masonry and as an anchoring cement to secure bolts or posts in horizontal concrete or masonry

Spurge and many other broadleaf weeds in Centipede

sterile needle and syringe should be used for each injection (needles and syringes may be sterilized by boiling in water for 15 minutes)

No washers

you can see

Broan 100 CFM 3.5 Sones 120V Bath Exhaust Fan Screws MasterSeal 590 (formerly Waterplug) isIncludes a light and built in night light Plug in permanently lubricated motor, centrifugal blower wheel for high performance at low sound levels Durable quiet damper to prevent cold backdrafts, no metallic clatter Polymeric duct connector with long tapered sleeve for easy, positive ducting Rugged 8 In. x 8 1 4 In. x 5 3 4 In. steel housing with adjustable mounting brackets that span up to 24 inches UL listed for use over bathtubs and showers when