Adhesives and sealants
November 29, 2017 By Glass Canada staff
Our roundup of top products that stick things together and keep them from leaking.
Fenzi Poliver sealant is a two-part polyurethane specially formulated for sealing insulating glass. Poliver is produced in different viscosities in order to suit the individual requirements of the operator and of the equipment in use, whether in a manual application dispensing equipment or an automatic robot sealing station. Poliver can be used either for the production of single-seal or dual-seal insulated glass units. Mixed at a ratio by volume of 100:8 (or simply 12.5 to 1), Fenzi polyurethane shows excellent adhesion to all substrates including glass, aluminum, stainless steel and galvanized steel components. Peel strength at 180 degrees to glass with cohesive failure is 110 per 25 millimeters. Poliver base material is shipped in steel drums containing 51 U.S. gallons with the corresponding catalyst being four U.S. gallons in pails, sold as a kit together. Poliver-made units typically are intended for use in both residential and commercial applications.
Short cure time
Proglaze II is a multi-component, high-modulus silicone sealant consisting of a white base and a black curing agent that, when mixed through a pump, cures to a tough, flexible rubber. Proglaze II is developed specifically for in-plant, two- and four-sided structural glazing and curtainwall applications where shortened cure time reduces glazing/sealing production time. High modulus delivers a tough flexible rubber cure when mixed through a pump, producing a tenacious, watertight seal. The short cure time reduces glazing/sealing production time with snap time as low as 30 to 60 minutes. Greenguard Gold certification ensures safety for use in the most sensitive indoor environments, including hospitals and schools.
Fast and consistent
Dow Corning 983 structural glazing sealant is designed for specialized use where dual structural and weatherseal applications are desired for factory glazing and curtainwall production. Once cured, this structural sealant forms a durable, flexible, watertight bond that can be warranted for 20 years and used in plus/minus 25 per cent movement weatherseal applications. It has excellent unprimed adhesion to glass, Alodine, and anodized aluminum, although Dow Corning Primer C is recommended for fast and consistent adhesion, especially to Kynar and other high-performance substrates approved for architectural structural glazing applications.
Cold not a problem
Sikasil WS-305 CN is a professional grade, neutral cure, medium modulus silicone sealant for weathersealing and curtainwall. Uses include conventional glazing; perimeter sealing of windows, doors and skylights; unitized curtainwall assembly and field installation; precast expansion joints; and weathersealing of most common building materials. It features outstanding ultraviolet and weathering resistance and may be applied in below-freezing temperatures if the substrates are completely dry, frost-free and clean. Excellent gunability is retained in all temperatures. WS-305 adheres to porous and non-porous materials, including glass, aluminium, metal, tile, fibreglass, plastic, ceramic, masonry, concrete, brick, powder coated aluminium, fluoropolymer painted surfaces, vinyl, PVC, granite, limestone, marble and wood. It’s capable of accommodating plus/minus 50 per cent joint movement and is unaffected by most atmospheric conditions. Manufactured to meet industry specifications ASTM C920 Class 50, TT-S00230C, and TT-S001543A, WS-305 comes in aluminum, anodised grey, black, bronze, colonial white, grey, limestone, medium bronze and white colours. Custom colours are available on request.
Complete silicone system
SilShield is transitioning to Elemax – a new name for the same product. GE SilShield SEC2600 AWB is transitioning to GE Elemax 2600 AWB. A 100-per-cent-silicone air-and-water-resistive barrier system is an enduring option for an energy efficient and watertight barrier around the building envelope. A complete silicone system eliminates any adhesion issues encountered at transitions between silicone and dissimilar materials. Without proper adhesion and compatibility, leakage, higher HVAC costs, water damage and energy inefficiency could ensue. Silicone has inherent properties that make it an excellent long-term energy-efficient solution for air barriers, including permanent flexibility for a durable and airtight system; ultraviolet and weather resistance for over 20 years; and cold-weather application down to 0 F. Elemax 2600 AWB is a suitable candidate for open-joint rain screen systems and has excellent flammability characteristics for consideration in NPFA 285-compliant wall systems.
Made for curtainwall
Pecora 985 is a fast-curing two-part, high-modulus, neutral-cure silicone sealant specially formulated and compounded for use in shop fabrication of structurally glazed curtainwall systems. The sealant is virtually unaffected by ultraviolet rays, ozone, temperature extremes or atmospheric contamination and is compatible with a variety of plain and coated metals, high-performance glass, decorative paints, gaskets, setting blocks and spacers. Features include high tensile strength; excellent working properties; an adjustable cure rate of 20 to 60 minutes allowing for fast fabrication and early movement of completed units; no lot matching of base and activator required; unprimed adhesion to glass, reflective glass coatings, anodized aluminum and other metals and most fluorcarbon paints; negligible sag or slump; and no corrosive byproducts or objectionable odor.
Not tied to one material
The Ecostar Evo range of machines from Wagner Reinhardt-Technik are high-quality metering and mixing systems, specifically developed for processing and applying viscous two-component edge sealants in the glazing industry. Polyurethanes, polysulfide and silicones can all be successfully applied with this versatile range of machines. Making use of a simple variable-ratio mechanical lever system, the metering ratio can be easily adjusted between 8:1 and 15:1 by volume, meaning that you are not tied to just one material manufacturer as you might be with a fixed-ratio machine. Smooth-running, powerful, hydraulically driven versions are available as well as pneumatically driven machines. The hardener component can be supplied as either a paste or a liquid. Units may be customized to your production requirements. Other Ecostar Evo features include a compact, lightweight and portable design; a static mixing system; continuous material output for high production rates; and no solvent flushing. Applications include window glazing, curtainwall manufacture, and insulating glass processes (primary and secondary sealing, corner key sealing, corner joint bonding).
Roll coat applications such as profile wrapping are also supported.
Saint-Gobain/Norton V2100 Thermalbond tape is a semi-rigid foam tape with an aggressive pressure-sensitive adhesive. This high density tape has a specially formulated cellular substrate and is used as a spacer for joint dimension control in structural silicone glazing systems. It is the most widely used spacer tape for structural silicone systems. It is suitable as a structural glazing spacer for field and shop glazing and an excellent spacer for two- and four-sided structural silicone glazing systems. Thermalbond is chemically compatible with all common silicones.
Suitable for all mirrors
Palmer Mirro-Mastic meets industry standards for a high-quality adhesive mastic. Mirro-Mastic is formulated for adhering plate glass mirror and acrylic mirror to various substrates. Mirro-Mastic has been field and laboratory tested for compatibility with all major brands of mirror and backing paints. It is formulated for use on plate glass and acrylic mirrors and will not damage mirror silvering. Mirro-Mastic stays live and won’t crack or dry. It absorbs normal vibration and allows movement due to normal thermal changes. Mirro-Mastic can be used on reinforced safety backings and is available in one- and five-gallon cans or 11- and 29-ounce cartridges.
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