Joint Former Lightweight, cross-linked, closed cell,

expanded Polyethylene joint former

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Joint former is lightweight and used as an expansion / contraction joint former. Joint former is a lightweight, cross-linked, closed cell, expanded Polyethylene joint former. It has particularly good compression qualities with remarkable recovery capacity and is chemical and water resistant. Glue Joint former onto concrete face and cast next section of concrete. A neat and even joint will be formed. Doesn’t need bond breaking strip and is compatible with silicone.

DIRECTIONS FOR USE:

• Ensure all concrete surfaces are free from base grit and dust.
• Apply glue in vertical strips ± 100 mm wide and 25 mm from the top to avoid the tear-off strip from sticking to the concrete face.
•  Allow the glue to dry (according to manufacturer’s instructions) and then stick Joint former onto the glued concrete face.
• Cast the next section of concrete as required. Take care not to let the wet concrete get behind Joint former as this will result in a wavy joint.
• When the joint sealant is about to be applied, simply peel the tear-off strip out of the formed joint, leaving an even groove of uniform depth for filling with sealant.

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Please Note: In conjunction with water retaining structures, Joint former must NOT be used where the water head is in excess of 3 metres.

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The correct size to be used depends on the condition of the formwork or type being used.

JOINT FORMER PRODUCT CODES AND SIZES:

Product	Foam	Width	Thickness
Code	Colour	(mm)	(mm)
JT50	White	50	10
JT80	White	80	10
JT90	White	90	10
JT100	White	100	10
JT110	White	110	10
JT115	White	115	10
JT120	White	120	10
JT125	White	125	10
JT150	White	150	10
JT170	White	170	10
JT175	White	175	10
JT180	White	180	10
JT190	White	190	10
JT200	White	200	10
JT220	White	220	10
JT230	White	230	10
JT250	White	250	10
JT280	White	280	10
JT300	White	300	10
JT340	White	340	10
JT400	White	400	10

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Advantages:

• Joint former has good compression qualities with good recovery capacity.
• Joint former is supplied with a hinged temporary blocking piece,leaving a clean, neat and perfectly sized groove providing a consistent depth channel for joint sealent.
• Joint former is cut to size, eliminating wastage and cutting on site.
• The Joint former material is flexible and can be used around corners.
• Joint former Excellent resistance to chemicals.
• Joint former is waterproof, does not disintegrate, rot or swell.
• No bond breaker required.

PHYSICAL PROPERTIES / TECHNICAL DATA:

Composition:	Closed cell, cross-linked expanded \  Polyethylene.
Colours:	White.
Roll size:	10 meters.
Density:	33 kg/m3 (nominal).
Size:	Available in various sizes and thicknesses  according to requirements.
Compression Deflection:	10 %: 36 kPa; 25 %: 61 kPa; 50 %:  143 kPa.
Compression-Set:	25 % 22 hr COMP. / 24 hr REC.: <6 %; 50%   22 hr COMP. / 24 hr REC.: <20 %.
Resistance:	Good resistance to dilute acids and alkalis.
Flammability:	< 310 mm / min. on a 3 mm sample.
Thermal Conductivity:	24°C: 0.037 W/m.K.
Temperature Range:	Up to 90°C.
Tensile Strength:	> 163 kPa.
Elongation and Break:	>144 %.

Products from Rebar, Mesh and Construction Supplies (Pty) Ltd have been used in some of the largest projects in South Africa and the African Continent.

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