INTRODUCTION:
 

APP ( Atactic Polypropylene) modified Bitumen reinforced membranes are produced from a blend of special polypropylene thermoplastic polymers and distilled Bitumen. This combination gives the proven waterproofing qualities of bitumen combined with plasticity, excellent resistance to heat, ageing and weathering and ease of  application by torch welding
Tar sheet membranes offer total impermeability to water, outstanding bond ability, seam lean integrity, easy repair and maintenance.

 

DESCRIPTION:

 

 TAR SHEET-BT are range of modified bitumen membranes with a reinforcement of rot proof, dimensionally stable 50-60 gsm glass matt. The inlay is positioned with in a matrix of bitumen modified with a special blend of polypropylene thermoplastics polymers (APP).

 

USES:

 

Generally recommended as the first, or a base layer of multilayer specification, and belowground. It is used a totally inert rot proof membrane is required. 

 

OUT STANDING FEATURES:

 
Dimensional stability.
Rot proof.
Insert base layer for multilayer specification
Aluminum foil finish ideal for exposed flashing.
 

GENERAL DATA:

 

Roll length 10 mtrs, 20mtrs

Roll width 1mtrs.

Thickness 1,2,3,4 mm

 
APPLICATION:
 

Application of Tar sheet may vary slightly depending upon site conditions. Apply Tuff coat Primer to a clean smooth and dry surface by brush, roller spray. Tar sheet is installed by torch welding method laid of fully bonded to substrate.

 

GENERAL GUIDE LINES FOR TORCHING:

 

The underside of the membrane should be torched just enough to superficially melt the Bitumen. Excessive heating may damage the reinforcement. Overlaps should be reheated from the top and released with trowel to ensure seams integrity.
All angles and abutment should be sealed with extra care to ensure full bondage. Seal the edges well into grooves and protect with relevant sealant.

 

TECHNICAL DATA

 

PROPERTIES

VALUES

TEST METHODS

 

1000

2000

3000

4000

 

Roll size, m

20 x 1

20 x 1

10 x 1

10 x 1

 

Thickness, mm

1.0

2.0

3.0

4.0

ASTM D 146

Carrier (Fiber Glass)weight g/m2

50

50

60

60

ASTM D 146

Coating mixture softening point (R&B) 0C Penetration at 25 0C, dmm.

Modified Bitumen
>140
15-25

 

ASTM D 36
ASTM D 5

Tensile strength (L/T), N/5 cm

150/100

200/150

350/250

350/250

ASTM D 882

Tear Resistance (L/T), N

50/60

50/70

60/80

60/80

ASTM D 4073

 

Puncture Resistance

 

Static : L2
Dynamic : I1

 

ASTM E 154

Resistance to water pressure

No Leakage

ASTM G 53

Water absorption, % (BSP)

< 0.15

ASTM D 5147

Heat Resistance at 1000C

No flow

ASTM D 4586

Resistance at Aging after 2000 hrs. (weather -0- Meter)

No Deterioration

ASTM D 4799

 

STORAGE:

 

Tar sheet should be stored vertically in clean covered area. Roll should not be stacked.