... high quality, cost effective, low odor, multi-purpose, one-part neutral curing sealant.JOINLEADER NP Neutral Silicone ... good weatherproof ability. Used in a range of general sealing, general glazing, waterproofing and trade applications. FEATURESStable and ... . JOINLEADER NP Silicone Sealant is ideally suited for general purpose glazing, sealing and weatherproofing applications, has excellent adhesion ...