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Overview
Specifications
Place of Origin:
West Bengal, India
Main Raw Material:
Polyurethane
Usage:
Construction
Brand Name:
STP LTD

Specifications

SHALIFLEX PU
formerly
Shalimar Tar Products Ltd
Low Modulus PU Mastic
First Category Elastomeric Sealant

SHALIFLEX PU

formerly
Shalimar Tar Products Ltd
Low Modulus PU Mastic
First Category Elastomeric Sealant

Areas of Application

Expansion Joints used in building industry Sealing joints for heavy frontage panels, curtain walls, assembling of panels, exterior woodworks Joint between frames and preframes, between wood
and stone wood Adheres on most supports in the building industry:
concrete, glass, and anodised aluminum, wood Standards ASTM C 920 1987 Advantages Single component, ready to use.
Good adhesion to many substrates.
Good weathering and ageing properties.
Excellent workability, easy to use.
Can be over painted.

 

Application Methodology
Preparation of Surface
Surface must be clean, dry and free of grease, oil and painting compound. Concrete surface must be dry and stable for (at least) four weeks. Users must check that the sealant is compatible with surface in terms of adhesiveness, staining and chemical compatibility. Making the Joint If necessary, apply a thin layer of PU Primer on the surface. After the Primer has dried press flexible non adhesive filler on the groove. The joint filler should be free of holes to ensure that bubbles do not form in the joint. For better finish use protection strip. For a narrow joint apply the sealant in one movement. For very wide joint apply the sealant in three places: The first two on the edges of the joint and third in the joint filler. Smooth out with soapy water. Press the sealant against the edges and the joint and joint filler while taking care not to create air bubbles. Remove protection strip. Clean the equipment with solvent like Xylene, Toluene. Polymerised sealant can be scrapped off. May be painted after polymerisation is complete. Use acrylic or vinyl dispersion paints after testing a section.

Characteristics

0 Skin formation time (23 C 50% RH)
Polymerised thickness after
0
: 90 - 120 Minutes
24 hrs (23 c, 50% RH) : 2.5 mm
0 Resistance to flow at 23 C ISO 7390 : ≤ 3 mm
0 Resistance to flow at 50 C
Application Temperature
On Polymerized Joints Hardness, Shore A Modulus elasticity at 100%Elongation at break Elastic recovery Movement Compatibility
ISO 7390 : ≤ 3mm
0 0 : ± 5 C ≤ T ≤ + 40 C
DIN 53 505 : 25
ISO 8339 : 0.25 MPa
ISO 8339 : 250%
ISO 7389 : > 70 %
: 25%
0 0 Service Temperature : - 20 C ≤ T ≤ + 80 C
Chemically resistant to: Water, Cleaning agent, accidental spray with oil, hydrocarbons and dilute
acids and bases. UV rays do not have much effect on Polyurethane. However, light shades change color. This change in the appearance does not modify their mechanical properties or leak tightness.
Caution
Contains Poly Isocyanates. Avoid contact with skin. In Case of contact with eyes, rinse immediately with water and consult a physician. Use only in ventilated areas. Keep out of reach of Children.
Storage
Expected life is 12 months from the manufacturing date in its original unopened package, away
from humidity.
0 Store in properly ventilated room at a maximum temperature of 30 C.

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