SikaProof®-315 HDPE SG IN

Pre-applied fully bonded HDPE self-adhesive membrane with protective sand layer for below ground waterproofing

SikaProof®-315 HDPE SG IN is a unique HDPE based self adhesive fully bonded sheet membrane comprising of a virgin HDPE layer, coated with a high bond strength adhesive, covered by a weatherproof protective sand sprinkled layer, for below ground waterproofing of reinforced concrete structures. It is loose laid onto prepared substrates or formwork before fixing reinforcement and casting concrete. The adhesive layer is activated when the concrete is poured on the surface and forms a permanent bond with the fresh concrete which will prevent the ingress of water around the structure. Reinforcement can be directly laid on top of the membrane and it does not require screed protection.

Usage

SikaProof®-315 HDPE SG IN can be used for damp proofing, waterproofing and concrete protection for basements, subway, tunnel and other below ground concrete structures against ground water ingress. Suitable for use on:

Packaging

Standard rolls are wrapped individually in a PE-foil

Roll length

20 m

Roll width

1.2 m, 1.5 m, or 2.0 m

Advantages

Colour

HDPE sideWhite
Adhesive sideOff white

Product Details

Product declaration


Bonded sheet membrane according to IS 16471 : 2017

 

Chemical base


HDPE sheet membrane with adhesive layer and sand topping

 

Shelf life


12 months from date of production

 

Storage conditions


The product must be stored in original unopened and undamaged sealed packaging in dry conditions and temperatures between +5 °C and +30 °C. Protect from direct sunlight, rain, snow and ice, etc. Store in a horizontal position. Do not stack pallets of the rolls on top of each other, or under pallets of any other materials during transport or storage.

 

Effective thickness


HDPE film~1.10 mm
HDPE membrane composite≥ 1.50 mm

System structure


The following system products must be used:

 

  • SikaProof®-315 HDPE SG IN sheet membrane
  • SikaProof® Sandwich Tape-100 IN double sided self-adhesive tape

Ancillary products:
Accessories and complementary products are available to provide detailing and connection solutions

 

Resistance to static puncture


≥ 1000 N 

(ASTM E154)

 

Tensile strength


≥ 25 MPa (film) 

(ASTM D412 mod)

 

Elongation at break


≥ 500 % 

(ASTM D412 mod)

 

Adhesion in peel


≥ 1500 N/m 

(ASTM D903 mod)

 

Joint peel resistance


≥ 1500 N/m

(ASTM D1876)

 

Flexibility at low temperature


Unaffected at -25 °C 

(ASTM D1970)

 

Water absorption


< 0.5 %

(ASTM D570)

 

Water tightness


> 71 m of hydrostatic head 

(ASTM D5385 mod)

 

Permeability to water vapour


< 0.10 ng/Pa·s·m2

(ASTM E96, method B)

Application

Ambient air temperature


+5 °C min. / +40 °C max.

 

Substrate temperature


+5 °C min. / +40 °C max.

APPLICATION INSTRUCTIONS


IMPORTANT

Strictly follow installation procedures

Strictly follow installation procedures as defined in Method Statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

 

EQUIPMENT


  • Measuring tape
  • Marking pen
  • Razor knife
  • Scissors
  • Pressure roller
  • Clean lint-free cloth
  • Metal straight edge for cutting
  • Hot air gun (Leister Triac)

 

SUBSTRATE QUALITY


IMPORTANT

The substrate application surface must be smooth, uniform and clean with no standing water.

  

SikaProof®-315 HDPE SG IN must be applied on a sufficiently stable substrate to avoid movement during the construction works. Large gaps and voids (≥ 12–15 mm) must be filled before membrane installation. Substrate can be damp or slightly wet. Suitable membrane fixing substrates include:

  • Concrete blinding
  • Formwork
  • Rigid thermal insulation
  • Plywood sheets / form
  • Shotcrete
  • Dimpled sheet drainage board

 

APPLICATION


IMPORTANT

 

Application by trained personnel

The application of this Product must only be carried out by an applicator that is trained or approved by Sika. The applicator must also be experienced in this type of application.

 

IMPORTANT

 

Unsuitable weather conditions for application

Do not install the membrane during continuous or prolonged rain, snowfall or sandstorm. If SikaProof®-315 HDPE SG IN is to be applied below +5 °C, exceptions are possible under special circumstances with appropriate precautions. Contact Sika Technical Services for more information.

 

IMPORTANT

 

Penetrations and construction joints

Additional Sika joint sealing solutions must be used for connections around penetrations and for construction joints.

 

IMPORTANT

 

Use of double-faced formwork

In cases of double-faced formwork, the membrane may show debonding from concrete, this does not affect the watertight performance of membrane. It is preferred to use post applied systems in projects with double-faced formwork.

 

IMPORTANT

 

Covering the membrane system

 

Permanent exposure to UV light will reduce the performance of the membrane system.

 

  1. Concrete must be placed within 60 days after membrane system installation.
  2. Proper concrete installation (mix design and workmanship) is required to achieve optimum bond of the membrane system to the concrete.

  

Installation method
After substrate conditions have been fulfilled, the waterproofing membrane is installed by loose laying onto horizontal / inclined substrates or fastening onto vertical substrates.

  

Longitudinal and transverse joints
Side lap joints of SikaProof®-315 HDPE SG IN are sealed by overlapping the membranes by 80 mm to 100 mm and removing release liner in longitudinal direction. Transverse joints shall be sealed by removing the granular sanded layer with a hot air tool (scraping) and then overlapped by 80 mm to 100 mm and bonded and sealed with cold applied SikaProof® tapes. Use rollers to release air pockets within joints to ensure proper sealing and bonding. The tape and selvedge adhesive can be heated by hot air gun to remove moisture or condensation and improve initial adhesion in cold conditions.

  

Detailing
Form all details and connections using the appropriate SikaProof® ancillary products outlined in the Sika® Method Statement: SikaProof®-315 HDPE SG IN.

  

Inspection and quality control of installation
A final inspection before placing concrete must be carried out to ensure the complete membrane system has been correctly installed, any damage repaired, and the surface of the adhesive layer is clean.

  

Concrete placement
Place concrete directly onto or against the membrane within 60 days after installation. No mortar or protection screed must be used before placement of reinforcement and concrete.

  

Formwork removal
After removing the formwork, all penetrations such as shuttering anchors, any membrane damage and construction joints must be sealed using the appropriate SikaProof® ancillary products or complementary Sika® Waterproofing Systems.

  

Backfilling protection

After formwork removal and before backfilling, SikaProof®-315 HDPE SG IN system must be protected with an appropriate protection sheet as soon as possible or at the latest within 60 days.

  

Note: Suitable ancillary systems such as spray applied coatings, liquid applied membranes, preformed modified membranes may be used in vertical and detailing applications. Please seek advice on these transitions from Sika Technical Services.

  

Reference must be made to the Sika Method Statement: SikaProof®-315 HDPE SG IN

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