Indasa 5" Rhynostick Red Line PSA Solid Sanding Discs (500 Series) are premium aluminum-oxide PSA (pressure-sensitive adhesive) sticky-back discs that press firmly onto a smooth PSA backup pad for fast, stable sanding. Red Line delivers Indasa's highest cut rate and longest life. Available 40–800 grit.
Why pros choose Indasa Red Line
High initial cut with anti-clog lubricant coating for long life
Strong PSA adhesive for a secure, chatter-free hold
Flexible backing for curves and contours
Uniform scratch pattern for a consistent finish
Anti-static & dust-repellent for cleaner work
Best applications
Body filler, primer, paint and clearcoat prep
Blending and refinishing
Fiberglass, gelcoat, solid surfaces and metals
Grit selection guide
40–80: heavy stock removal & filler leveling
120–180: filler shaping & primer prep
220–400: final prep before topcoat
500–800: denibbing & fine finishing
Compares to
A premium alternative to 3M Stikit Gold, Mirka Gold PSA, and Norton A275 stick-on abrasives.
What pad do these use? A smooth PSA (sticky-back) backup pad — not hook & loop. Shop PSA Backup Pads.
PSA vs grip (hook & loop)? PSA sticks directly to a smooth pad and runs very flat; grip discs peel on and off for quick changes. For the hook & loop version see the 5" Rhynogrip (510).
Red Line vs White Line? Red Line is the premium, longest-life, highest-cut line; White Line is the everyday line.
