Formulated using hybrid polymer technology, this H.B. Fuller® FulaFlex™ 620 Sealant cures to form an elastic and weatherproof seal on expansion joints. It is suitable for use in waterproofing and perimeter sealing applications.

• This hybrid polymer sealant is ideal for sealing high‑movement joints around openings, façades, and wet areas
• Low modulus formulation accommodates joint movement of up to ±35%
• It is suitable for internal and external applications
• Hybrid polymer formulation delivers a tough, elastic seal after curing
• Water, solvent, and isocyanate-free formulation supports safer on‑site use
• This sealant forms a durable, flexible seal suitable for doors, windows, tiled areas, and building joints
• Provides strong adhesion to common building surfaces, including concrete, masonry, fibre cement, metal, and timber without priming
• Resistant to weathering, UV exposure, seawater, and common cleaning agents
• Suitable for use in wet‑area waterproofing applications in accordance with AS 3740
• This sealant will not sag, slump, shrink, or bubble during curing
• It can be painted once cured

This H.B. Fuller® FulaFlex™ 620 Low Modulus Hybrid Polymer Sealant Low odour and low VOC formulation for safe indoor use. Check out our wide range of sealants online for more options.