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Bostik Seal N Flex 1:  

Bostik Seal N Flex 1 is a low modulus, one component, Class-A polyurethane sealant. When cured it will form a tough, flexible seal capable of cyclic expansion and compression movement of 100% (+ 50%) of the original installed joint width.

It has excellent resistance to normal weathering conditions such as rain, sunlight, snow, sleet, ozone, atmospheric contamination and pollution. This ability enables it to retain its original properties after years of exposure, refer to the CSIRO RILEM LONG- TERM SEALANT DURABILITY STUDY DBCE Doc. 97/196 (M)

 

RECOMMENDED USES

 

Sealing joints in:

 

Insitu concrete & render.

Precast and tilt up panels.

Brickwork & block work.

Plasterboard face and paper lined recessed edges.

Fibre cement sheet.

Aluminium windows.

Granite, sandstone and marble.

GRC, fibreglass & most specialty panel systems

 

CLASIFICATION STANDARDS

 

CSIRO RILEM LONG - TERM SEALANT DURABILITY STUDY DBCE Doc. 97/196 (M)

SO 11600-Class F-25LM DIN 18540 (German) and SNJF (French) approval as a low modulus external joint sealant

ASTM C.920-87 & 98 (USA) as Type S, Grade NS, Class 25, use NT, G, A, M, &O as an external joint sealant.

AS4020 Potable water

AS1157-1972 Resistance to fungal growth

Ministry of Agriculture and fisheries New Zealand (Meat, fish, Game, Poultry- All areas)

 

FEATURES

 

Low modulus 100 %( + 50%)

Excellent durability

One component, no mixing required

Australian made

12 standard colours

Acoustic rating

Paintable (refer limitations)

Non staining

 

APPLICATION INSTRUCTIONS PREPARATION

 

Clean and dry all surfaces by removing foreign matter and contaminants such as laitance, oil, dust, grease, frost, water, dirt, old sealants, curing agents and any protective coating. Dust and loose particles should be vacuum cleaned. Priming of all surfaces is recommended to achieve stated performance properties.

DO NOT USE METHYLATED SPIRITS OR TURPS.

 

PRIMING POROUS SUBSTRATES

 

Absorbent or porous substrates will allow a bead of water to easily soak into and wet out the surface of the substrate.

For maximum performance on porous surfaces and, in all periodically immersed and submerged applications, use Bostik N49 Primer, or one coat of Bostik MVP525 (refer to the relevant Technical Data Sheet).

Porous substrates not subject to immersion or ponded water, e.g. vertical expansion joints in concrete or masonry structures, do not require priming if clean, dry and uncontaminated.

 

NON POROUS SUBSTRATES

 

Non-absorbent substrates will cause a bead of water to be retained on the surface of the substrate as a raised droplet. The droplet does not easily soak into the surface of the substrate.

Bostik MVP525 is recommended for non-porous or burnished/overworked concrete substrate. (refer to the Bostik MVP525 Technical Data Sheet)

Bostik N40 Primer is recommended for non-porous plastic and metal substrates E.g. UPVC outlets and pipe work: brass, copper fittings, stainless steel trays and flashings (refer to the Bostik N40 Technical data Sheet).

Prime all plastics and metallic non-porous substrates with Bostik N40 Primer using the two-cloth method described in the Bostik N40 Technical Data Sheet.

 

APPLICATION

 

Bostik Seal-N-Flex 1 should be dispensed from either the cartridge or sausage by means of a caulking gun (available from Bostik).

Cartridge - Pierce the membrane at the top of the cartridge and screw on the nozzle. Cut nozzle to give the required angle and bead size. Place the cartridge in a Bostik applicator gun and squeeze the trigger.

Sausages, a barrel gun is required; clip the end of the sausage and place in barrel gun. Screw end cap and nozzle on to barrel gun. Using the trigger extrude the sealant, to stop depress using the catch plate.

 

Apply Bostik Seal N Flex 1 in a continuous bead using enough pressure to properly fill the joint. Tool off surface of sealant with an appropriate sized spatula or trowel. Apply sufficient pressure to leave a smooth, consistent surface and ensure maximum contact with the interface of the joint.

 

JOINT SEALING HINTS

 

Always use backing rod for correct sealant geometry & contact with the substrate.

Prime after the installation of the backing rod.

Ensure maximum adhesion to bond face

Minimum allowable joint depth is 6mm.

Minimum allowable joint width is 5mm.

Depth to width ratio of 1:1 up to 12mm width, and 1:2 from 12 - 50mm width.

Tool sealant to achieve concave shape

 

COVERAGE The estimated lineal metre yield, per pack size, is recommended in the following table. No allowance has been made for waste or irregular joint geometry.

 

JOINT SIZE (D x W)

6mm x 5mm

10mm x 10mm

10mm x 20mm

300ml cartridge

10

3

1.5

600ml sausage

20

6

3

 

Calculation formula (W x D X L) / 1000 = Litres

 

Litres / 0 .3 = No of 300ml Ctgs

Litres / 0.6 = No of 600ml Sgs

 

W = Joint Width (mm)

D = Joint Depth (mm)

L= Length (metres)

 

 

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