BIO-ZOLVE Presoak Gel is specially formulated to pre-clean and loosen blood, fat, tissue and bodily fluids safely from surgical instruments and apparatus. The wetting agents in BIO-ZOLVE will keep instruments moist for hours, allowing for safer and easier processing. It is a neutral-pH product and contains an anticorrosion system, making it completely safe for all metals and scopes. Use immediately after a procedure or prior to processing.