The polyethylene watch will slip slightly and wear the surface of the plastic/acyl clock, which softens the edges of the scratch and fills the gap with the dissolved material. 100% brand new 5 grams application: Apply polywatch to plastic watch glass. Use a piece of lint to wipe the scratched area under pressure for 2-8 minutes. Severe scratches must be stepped on more than once. Recommended for samples with plastic glass and other watches. Package included: 1 x 5g polish polywatch tube