Product Data Sheet Safety Data Sheet Show all documents

SikaProof® A-12

FPO SHEET MEMBRANE FOR PRE-APPLIED FULLY BONDED BELOW GROUND WATERPROOFING

SikaProof® A-12 is an embossed polyolefin FPO sheet membrane for pre-applied fully bonded below ground waterproofing of reinforced concrete structures. Membrane thickness 1,2 mm. SikaProof® A-12 is cold-applied without heat or open flames to prepared substrates or onto formwork before fixing reinforcement and concrete placement. The membrane has self-adhesive longitudinal strips for bonding overlap joints and is laminated with a unique sealant and a non-woven fleece backing layer which creates a bond with the cast concrete.

  • Can be used as a methane and carbon dioxide resistant membrane when installed as a waterproofing membrane fully bonded to concrete according to BS:8485:2015+A1 2019.
  • Will restrict the ingress of radon into buildings from naturally occurring sources
  • Fully bonded to the reinforced concrete structure
  • No lateral water underflow between the concrete structure and the membrane system
  • Validated high watertightness
  • High flexibility and crack-bridging
  • Pre-applied, before fixing reinforcement and concrete placement
  • Easy to install with fully adhered joints (no welding required)
  • Cold-applied (no pre-heating or open flames)
  • Good tear and impact resistant properties
  • Temporarily resistant to weathering and UV-light during construction
  • Highly durable and resistant to aging
  • Resistant to aggressive elements in natural ground water and soil
  • Can be combined with other approved Sika Waterproofing / Joint Sealing Systems
SikaProof® A-12 SikaProof® A-12
Product Data Sheet Safety Data Sheet Show all documents

Usage

Waterproofing, concrete protection and gas resistant membrane for basements and other below ground concrete structures against ground water ingress. Suitable for use on:
  • Reinforced concrete base slabs
  • Reinforced concrete walls with both single and double-faced formwork
  • Extension and reconstruction works
  • Prefabricated structures
  • Shotcrete structures

Advantages

  • Can be used as a methane and carbon dioxide resistant membrane when installed as a waterproofing membrane fully bonded to concrete according to BS:8485:2015+A1 2019.
  • Will restrict the ingress of radon into buildings from naturally occurring sources
  • Fully bonded to the reinforced concrete structure
  • No lateral water underflow between the concrete structure and the membrane system
  • Validated high watertightness
  • High flexibility and crack-bridging
  • Pre-applied, before fixing reinforcement and concrete placement
  • Easy to install with fully adhered joints (no welding required)
  • Cold-applied (no pre-heating or open flames)
  • Good tear and impact resistant properties
  • Temporarily resistant to weathering and UV-light during construction
  • Highly durable and resistant to aging
  • Resistant to aggressive elements in natural ground water and soil
  • Can be combined with other approved Sika Waterproofing / Joint Sealing Systems

Packaging

Rolls wrapped individually in a yellow PE-film.

Product

Roll width

Roll length

SikaProof® A-12

1,00 or 2,00 m

20 m

Refer to current price list for packaging variations.

Colour

Light yellow sheet membrane, laminated with a white fleece layer

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

  • BRE Environmental Product Declaration (EPD) available

APPROVALS / STANDARDS

  • CE Marking and Declaration of Performance to EN 13967 - Flexible sheets for waterproofing - Damp proofing and basement tanking
  • Agrement Certificate, SikaProof® A-08 & A-12, BBA, Certificate No.13-5075
  • Test Certificate,DIN EN 13967,SikaProof®A-12,MPANRW,Certificate No.P-22-MPANRW-11990-2
  • CCT57, SikaProof® - Sika Bit®, SOCOTEC, No.601ROEAD9247
  • NZBC, SikaProof® A, BRANZ, Appraisal No.852(2014)
  • Test Report Penetrations and Pipes, SikaProof® A-08, WISSBAU, No.2010-212-6
  • Test Report Pile Head, SikaProof® A-08, WISSBAU, No.2010-212-7
Product Information

Chemical Base

Membrane Layer

Flexible Polyolefin (FPO)

Sealant grid

Polyolefin (PO)

Fleece layer

Polypropylene (PP)

Shelf Life

18 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 + 30 °C. 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. Always refer to packaging.

Product Declaration

EN 13967:Flexible sheets for waterproofing – Damp proofing and basement tanking

Effective Thickness

Total Thickness (= deff)

1,70 mm (-5 % / +10 %)

Membrane Thickness

1,20 mm

Mass per unit area

1,50kg/m2 (-5 % / +10 %)

(EN 1849-2)
System information

System Structure

The following system components must be used:

  • SikaProof® A-12 sheet membrane
  • SikaProof® A-12 Edge pre-formed L-shaped sheet membrane
  • SikaProof® Tape-150 A self-adhesive tape for internal jointing
  • SikaProof® ExTape-150 self-adhesive tape for external jointing

Ancillary products:

  • Accessories and complementary products are available to provide detailing and connection solutions.
Technical Information

Resistance to Impact

≥ 350 mm

(EN 12691)

Resistance to Static Load

≥ 20 kg

(EN 12730)

Resistance to Root Penetration

Pass 

(CEN/TS 14416)

Tensile Strength

Machine direction

≥ 700 N/50 mm

Cross direction

≥ 700 N/50 mm

Elongation

Machine direction≥ 900 %
Cross direction≥ 1150 %

Resistance to Tearing (nail shank)

Machine direction

≥ 550 N

Cross direction

≥ 600 N

Joint Shear Resistance

≥ 300 N / 50 mm

(EN 12317-2)

Reaction to Fire

Class E

(EN 13501-1)

Accelerated Ageing in Alkaline Environment Tensile Strength

Pass (28 d / +23 °C)

(EN 1847)

Pass (Method B, 24 h / 60 kPa)

(EN 1928)

Water Tightness

Pass (Method B, 24 h / 60 kPa)

(EN 1928)

Resistance to lateral water migration

Pass, up to 7 bar

(ASTM D 5385 modified)

Durability of Water Tightness against Ageing

Pass (12 weeks)(EN 1296)
Pass (Method B, 24 h / 60 kPa)(EN 1928)

Durability of Water Tightness against Chemicals

Pass (28 d / +23 °C)

(EN 1847)
Pass (Method B, 24 h / 60 kPa)(EN 1928)

Permeability to Radon

5,3±0,7 × 10-12 m2/s

(Certificate E-214/2011)

Permeability to Methane

140 ml/(m2·d) (±10 %)(ISO 7229)

Service Temperature

-10 °C min. / +35 °C max.

Application

Application Information

Ambient Air Temperature

+ 5 °C min. / + 35 °C max.

Substrate Temperature

Substrate bonding surface: minimal +5 °C (Refer to important considerations for more information)
Application steps

EQUIPMENT

  • Tape measure
  • Marking pen
  • Razor knife
  • Scissors
  • Pressure roller
  • Clean lint-free cloth
  • Metal straight edge for cutting
  • Protective sheet for cutting

SUBSTRATE QUALITY

SikaProof® A-12 membrane must be applied on a sufficiently stable substrate to avoid movement during the construction works. Substrate surface must be smooth, uniform and clean. Large gaps and voids (> 12–15 mm) must be filled before membrane installation. Substrate can be damp or slightly wet, ponding water must be avoided. Suitable membrane fixing substrates include:

  • Concrete blinding
  • Formwork
  • Rigid thermal insulation
  • Plywood sheets / forms

Documents