SIGA Majvest 500 SA – 18" × 100' (150 sq. ft.)
SIGA Majvest 500 SA is a high-performance self-adhered, vapour-permeable exterior membrane designed to provide continuous air and weather protection for wall assemblies.
The 18" × 100' roll provides 150 sq. ft. of coverage, making this narrower format ideal for detailed areas, transitions and smaller sections where a full-width membrane is unnecessary.
The reverse face is coated with a pressure-sensitive adhesive for direct bonding to common building materials. SIGA states that Majvest 500 SA adheres to substrates including concrete, plywood, gypsum and metal without primer, helping reduce installation steps and labour.
Its 50/50 split, tear-resistant release liner makes positioning and installation easier, while strong adhesion at both high and low temperatures supports year-round installation.
