Sika® BituSeal T – 140 SG (0°C) is a torch-on sheet waterproofing membrane that is flexible to 0°C. It is based on APP (atactic poly-propy-lene)  modified bitumen, reinforced with polyester non woven fabric. It has a slate granule broadcast surface and the reverse is faced with a polyethylene film to ease installation works.

Uses

- Waterproofing and damp-proofing of the exterior walls of base-ments against percolating water and damp soil.

- Waterproofing of retaining walls

- Waterproofing on flat roofs under protective layers or ballast

- Waterproofing on flat and exposed roofs and under tiles

- Waterproofing on balconies/terraces under tiles

ADVANTAGES

Resistant to ageing

Resistant to weathering with improved durability

Good tensile strength and elongation

High resistance to water vapour (non-vapour permeable)

Good dimensional stability

Flexible at low temperatures

Easy to install with the torch-on method

Not resistant to root penetration

Suitable as top layer for multi layer installations

Good resistance to mechanical impact

Must be installed on suitable primed, uniform and smooth sub-strates such as concrete and brickwork

PRODUCT DATA

SUBSTRATE QUALITY

Clean, sound and dry, homogeneous, free from oils and grease, dust and loose or friable particles. Horizontal surfaces must be sloped > 1.5%.

APPLICATION CONDITIONS/LIMITATIONS

Substrate Temperature:  +5°C min. / +65°C max

Ambient Temperature:    +5°C min. / +50°C max.

Substrate Moisture Content: <=25 %

Relative Air Humidity: <= 85 %

APPLICATION INSTRUCTIONS
The cold applied bituminous primer shall be applied on the substrate for the first membrane layer as followings: Application by brush, roller, or airless spray. Waiting time is dependent on the temperature, for the primer to complete evaporation. (Note: Priming is not required for the second and further membrane layers).

The membrane is fully bonded to the substrate by the torch-on method using a gas torch. Unroll and position the membrane roll with the polyeth-ylene film surface on the substrate. Roll out half a roll length, heating the membrane reverse with the gas flame until it melts the polyethylene film and bitumen mass, and allowing continuous unrolling. A bead of liquid bitumen must be visible on the underside of the roll. The  torch-on mem-brane must be firmly pressed onto the substrate in order to avoid air entrapment using a special roller or heavy brush. Repeat this procedure with the second half of the roll. All membranes must be overlapped by a min. 100 mm. The seams must be finished with a roller to prevent the formation of any gaps or voids.