Bostik Seal 'N' Flex® 1 is a low modulus, one-component, Class-A polyurethane sealant. It offers smart advantages such as low modulus, ±50% joint movement capability, excellent durability, and acoustic rating. The sealant is non-staining and paintable* and is available in 12 popular colours. Made in Australia, it provides a tough and flexible seal capable of cyclic expansion and compression movement of 100% (±50%) of the original installed joint width.
Colors:Black, White, Grey
Size: 300ml Catridge, 600ml Sausages
Applications of Seal 'N' Flex® 1 Polyurethane Sealant
Bostik Seal 'N' Flex 1 can be used on:
Insitu concrete and render
Precast and tilt-up panels
Brickwork and blockwork
Plasterboard face and paper-lined recessed edges
Fibre cement sheet
Granite, sandstone, and marble
GRC, fiberglass, and most specialty panel systems
Bostik Seal 'N' Flex 1 meets the following standards:
CSIRO RILEM Long-Term Sealant Durability Study DBCE Doc. 97/196 (M)
DIN 18540 (German) and SNJF (French) approval as a low modulus external joint sealant
AS4020 Potable Water
ASTM C.920-87 & 98 (USA) as Type S, Grade NS, Class 50, use NT, G, A, M, & O as an external joint sealant
AS1157-1972 Resistance to fungal growth. Ministry of Agriculture and fisheries New Zealand (Meat, fish, Game, Poultry- All areas)
Cleaning of Seal 'N' Flex® 1 Polyurethane Sealant
It is recommended to use protective goggles, barrier creams and ointments, gloves, and protective clothing. Cured material can only be removed by mechanical means. Clean off uncured material and equipment immediately after use using Bostik Handy Wipe towels to remove adhesive from the skin.
Bostik Seal 'N' Flex 1 can be painted after a minimum of 7 days. Coatings containing solvents such as enamels, oil-based, or other coatings may cause the surface of the sealant to react, creating a tacky surface. Surface coatings may discolour in direct contact with cured Bostik Seal 'N' Flex 1. Surface coatings may crack and craze due to cyclical movement of the supporting sealant joint. It is recommended to perform a field test to ensure compatibility of any coating with Bostik Seal 'N' Flex 1.
Limitations of Seal 'N' Flex® 1 Polyurethane Sealant
Bostik Seal 'N' Flex 1 is not recommended for the following:
Use in chlorinated water such as swimming pools, spas, etc.
Use on any material containing bitumen
Constantly immersed saltwater
Application to cement-based substrates within 28 days of initial pour or set
Use in trafficable joints
Applied in temperatures below 5°C or above 35°C
Exposure to water and/or alcohol before it has completely cured
Finished using wet tooling techniques, using solvents, water, or detergent/soap solutions
Applied to joints less than 5mm in width and 6mm in depth
Applied on joints larger than 50mm
Bostik Seal 'N' Flex 1 White may yellow on the surface if exposed to strong natural or artificial UV light for prolonged periods of time. Composite metallic façade systems can be subject to significant daily cyclical movement due to temperature variations. Crimping and bulging of the installed sealant before full cure may permanently deform the sealant's finish prior to full cure, especially on Northern and Western elevations in full sunlight. Refer to Bostik V70 Silicone Technical Data Sheet as a recommended metal façade sealant.
Storage and Shelf Life
Store Bostik Seal 'N' Flex 1 in a cool (between 5°C to 30°C), dry, well-ventilated area out of direct sunlight. Store away from oxidizing agents and acids. The shelf life is 24 months in the original unopened container.