GUARDIAN WS720 is a High-performance Weather Sealant one-part, cold applied, moisture curing, 100% silicone sealant that is formulated for Joint seal. It has ultra-high elongation and remains very durable. It has good flexibility and a low modulus, so it will maintain its integrity on joints with movement. GUARDIAN WS720 exhibits excellent unprimed adhesion to concrete, steel, and most other construction substrates, provided they are clean, dry and free of dust and frost. It is unaffected by sunlight (ultra-violet rays), ozone, temperature extremes, rain and snow. It has a long service life, under normal conditions it will maintain its physical properties between -60°C to 200°C (-76°F to 392°F).
