Product Data Sheet Show all documents

SikaBit® VB SA-730 K

Self-adhesive vapour control layer, aluminium reinforced, flexible at -25 °C

SikaBit® VB SA-730 K is an SBS modified bituminous, self-adhesive vapour control layer. It is reinforced with aluminium foil and a dimensionally stable non-woven polyester inlay. The underside has a removable liner over the adhesive compound for an easy application. It can be applied to wood, metal and concrete substrates. Top surface finish: polyethylene film. Weight: ~3,0 kg/m2.

  • High resistance to vapour movement
  • Easy and speed of installation from self-adhesive properties
  • Good watertightness
  • High elongation
  • High mechanical properties
  • Good adhesion at low temperatures
  • Accommodates a wide range of roof system, deck types and substrate combinations
  • Choice of substrates primers
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Product Data Sheet Show all documents

Usage

Roof waterproofing membrane for:
  • Flat and sloping roofs
  • As vapour control layer for roofs over high humidity spaces (RH at 20 °C ≤ 80 %)
Roof deck substrate types:
  • Metal
  • Plywood panels, oriented strand board (OSB)
  • Polystyrene and extruded foam
  • Polyurethane foam coated with polyethylene fibreglass felt, etc.
 

Advantages

  • High resistance to vapour movement
  • Easy and speed of installation from self-adhesive properties
  • Good watertightness
  • High elongation
  • High mechanical properties
  • Good adhesion at low temperatures
  • Accommodates a wide range of roof system, deck types and substrate combinations
  • Choice of substrates primers

Packaging

Roll size

Length

10,00 m

Width

1,00 m

Weight30,0 kg (3,0 kg/m²)

Colour

Top surface

Polyethylene film

Backing

Release liner

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • CE marking and Declaration of Performance to EN 13970 – Bituminous layers for Vapour Control
Product Information

Chemical Base

SBS modified bitumen

Reinforcing Material

Aluminium foil and a non-woven polyester fabric stabilised with fibreglass

Shelf Life

12 months from date of production

Storage Conditions

Product must be stored in original unopened and undamaged sealed packaging in dry conditions and temperatures between +5 °C and +35 °C. Store in a vertical position. Do not stack pallets of the rolls on top of each other, or under pallets of any other materials during transport or storage. Always refer to packaging.

Product Declaration

EN 13970: Bituminous layers for Vapour Control

Length

10 m -1 %

Width

1 m -1 %
Technical Information

Tensile Strength

Longitudinal

250 N/50 mm ± 20 %

Transversal

120 N/50 mm ± 20 %

Elongation

Longitudinal

15 % ± 15 %

Transversal

20 % ± 15 %

Tear Strength

Longitudinal

100 N ± 30 %

Transversal

100 N ± 30 %

Flexibility at low Temperature

-25 °C

(EN 1109)

External Fire Performance

"EXT.F.A.B.

(BS 476)

Reaction to Fire

Class E

(EN 13501-1)

Flow Resistance

≥ 100 °C

(EN 1110)

Artificial Ageing

Passed

(EN 1297)

Water Tightness

60 kPa

(EN 1928-Method B)

Application

Application Information

Ambient Air Temperature

+5 °C min. / +50 °C max.

Relative Air Humidity

80 % max

Substrate Temperature

+5 °C min. / +50 °C max.
Application steps

SUBSTRATE QUALITY

The supporting structure must be of sufficient structural strength to apply all new and existing layers of the roof build-up. Complete roof system must be designed and secured against wind uplift loadings.

The substrate must be uniform, firm, smooth and free of any sharp protrusion or burrs, clean, dry, free of grease, bitumen, oil, dust and loosely adhering particles.

SUBSTRATE PREPARATION

Use the appropriate preparation equipment to achieve the required substrate quality.

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