Hind Sealant PU is used both horizontal & vertical expansion joints in all type of building and civil engineering construction such as:
Surface Preparation: All surfaces must be clean, dry and free oil, grease and loose particles. Correct joint depth can be determined by inserting compressible board tightly into the joint. Protect surface with a masking tape.
Flat, Soft or Round Polyethylene backing material should be used for controlling the depth so that sealant is filled as per the specification.
Priming: In most cases high bond strengths can be obtained without use of primer. Prior to application, adhesion testing is recommended to determine the requirement of primer. Contact our technical division for exact type of primer recommendations.
Application: Preparation of the joint and substrate are to be done at first and then backing rod is inserted into the joint to maintain the required depth. After making a 1” slit near to the crimp at one end of the sausage pack, it is loaded into the applicator barrel (the slit should be out) . The rounded end of the sausage nozzle is placed onto the slit end of the sausage pack and fitted with a retaining ring. The nozzle is now cut as per desired size and shape and is dispensed with the nozzle tip in contact with the substrate for proper gap filling. The entire material to be used within 24 hours from the time it is cut off. The bonding of the sealant should occur within the first 50% of the skin time. Hind Sealant PU should not be applied over frozen or wet surfaces. Should not be applied over silicone or hybrid products and every care to be taken so that it does not come into contact with alcohol and solvents during curing. Sealant can be tooled off immediately after application to give the desired appearance.
Joint Design: Minimum joint depth = 8 mm
Maximum joint width = 30 mm
Approximate Consumption :
|Width of Joint||10mm||15mm||20mm||25mm||30mm|
|Depth of joint||8mm||8mm||10mm||12mm||15mm|
|Joint length per 600 ml||7.5 – 8.0 m||4.5- 5.0 m||2.5-3.0 m||1.5-1.7m||1.2-1.3m|
|Aspect||Grey Colour Paste|
|Base||Single Component Polyurethane|
|Density||1.3Kg/Ltr at 300 C|
|Rate of Curing||~ 3mm /24 hours ( > 230 C /50% Relative Humidity)|
|Tack-Free Time (ASTM C 679)||60 minutes|
|Movement Accommodation||± 25 % of the width|
|Sag Flow||0 mm, very good|
|Tear Strength||Minimum 0.3 N./ mm²|
|Shore “A” Hardness (ASTM C661)||30- 35|
|Elongation at Break||>600%|
|Full Cure||7 days|
|Width to Depth ratio||Width 2:1 depth.|
|Temperature Range||From 5º C to 80º C|
12 months from the date of manufacture in unopened condition. Keep in cool and dry place away from direct sunlight between 100 C to 250 C.
600 ml & 310 ml sausages.
Hind Sealant PU is non-toxic. If contact with skin occurs must be cleaned with suitable solvents. If contact with eyes occurs, wash well immediately with water and seek medical advice.