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SikaProof® A+ 12

FPO sheet membrane for pre and post-applied fully bonded below ground waterproofing

SikaProof® A+ 12 is a polyolefin (FPO) based sheet membrane for below ground waterproofing of reinforced concrete structures. A special hybrid bonding layer on the membrane forms a full and permanent dual bond with the concrete structure. The membrane can be pre or post-applied. Joints are sealed with cold-applied tapes or by thermal jointing using appropriate heating equipment. The total thickness is 1.75 mm with a 1.20 mm thick waterproofing layer. Suitable for use in hot and tropical climatic conditions.

  • Dual bond: full and permanent mechanical and chemical bond with the concrete structure
  • Can be used as a pre and post-applied system
  • Joints can be sealed using thermal jointing or cold applied tapes
  • No lateral water migration between concrete and membrane
  • Excellent barrier to radon
  • Fast and easy installation
 
  • High flexibility and crack-bridging capabilities
  • High watertightness tested according to various standards
  • Good resistance to aggressive conditions in natural ground water and soil
  • Temporarily resistant to weathering and UV exposure
  • Can be combined with other approved Sika® waterproofing and joint sealing systems
SikaProof® A+ 12
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Usage

SikaProof® A+ 12 is used for:
  • Damp-proofing, waterproofing and concrete protection for basements and other below-ground concrete structures.
SikaProof® A+ 12 is suitable for use on:
  • Precast reinforced concrete structures
  • Cast-in-place reinforced concrete structures
  • Existing reinforced concrete structures

Advantages

  • Dual bond: full and permanent mechanical and chemical bond with the concrete structure
  • Can be used as a pre and post-applied system
  • Joints can be sealed using thermal jointing or cold applied tapes
  • No lateral water migration between concrete and membrane
  • Excellent barrier to radon
  • Fast and easy installation
 
  • High flexibility and crack-bridging capabilities
  • High watertightness tested according to various standards
  • Good resistance to aggressive conditions in natural ground water and soil
  • Temporarily resistant to weathering and UV exposure
  • Can be combined with other approved Sika® waterproofing and joint sealing systems

Packaging

Roll width

1.00 m or 2.00 m

Roll length

25 m

Refer to the current price list for available packaging variations.

Colour

Top layer colour

Light yellow

Bottom layer colour

Grey

Product Details

Sustainability / Certifications / Approvals

SUSTAINABILITY

  • Specific Environmental Product Declaration (EPD) in accordance with EN 15804. EPD independently verified by BRE Global

  • Contributes towards satisfying Materials and Resources (MR) Credit: Building product disclosure and optimization — Environmental Product Declarations under LEED® v4

  • Contributes towards satisfying Materials and Resources (MR) Credit: Building Product Disclosure and Optimization — Material Ingredients under LEED® v4

CERTIFICATES AND TEST REPORTS

  • CE marking and declaration of performance based on EN 13967:2012 Flexible sheets for waterproofing — Plastic and rubber damp proof sheets including plastic and rubber basement tanking sheet — Definitions and characteristics

  • Watertightness functional test PG FBB Part 1, WISSBAU, Test report No. 2019-231-1

  • Watertightness functional test PG FBB Part 1, WISSBAU, Test report No. 2018-275-1

  • Watertightness functional test PG FBB Part 1, WISSBAU, Test report No. 2018-276-1

  • Radon diffusion coefficient, SikaProof® A+ 12, Dr. Kemski, Test report No. 2022081101e

 
Product Information

Composition

Membrane Layer

Flexible Polyolefin (FPO)

Hybrid Layer

Cement modified polymer

Shelf life

24 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. 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 the packaging.

Effective thickness

Total Thickness (=deff)

(1.75 +0.18 / -0.09) mm

Thickness Waterproofing Layer

(1.20 +0.12 / -0.06) mm

Mass per area

(1.65 +0.17 / -0.09) kg/m²

(EN 1849-2)
System information

System structure

The following products are part of the pre-applied system:

  • SikaProof® A+ 12 sheet membrane

  • SikaProof® Tape A+ N for detailing and for internal jointing

  • SikaProof® Sandwich Tape

The following products are part of the post-applied system:

  • SikaProof® A+ 12 sheet membrane

  • SikaProof® Adhesive-03 AE

  • SikaProof® ExTape-100

Complementary products are available for detailing and joint solutions.
Technical Information

Resistance to impact

Method A, Hard support

≥ 400 mm

Method B, Soft support

≥ 400 mm

Tensile strength

Longitudinal (MD)

≥ 750 N/50mm

Transversal (CMD)

≥ 750 N/50mm

Joint shear resistance

≥ 100 N/50 mm

(EN 12317-2)

Reaction to fire

Class E

(EN 13501-1)

Accelerated ageing in alkaline environment

Tested for 28 days at +23 °C

Pass

Tested for 24 hours at 60 kPa

Pass

Watertightness

Method B, 24 hours at 60 kPa

Pass

Durability of watertightness against ageing

Aged 12 weeks at +70 °C, tested 24 hours at 60 kPa

Pass

Durability of watertightness against chemicals

Calcium hydroxide, aged 28 days at +23 °C, tested 24 hours at 60 kPa

Pass

Service temperature

Maximum

+35 °C

Minimum

-10 °C

Adhesion in peel

≥100 N/ 50 mm to concrete after 28 days

(DIN EN 1372)

 

Resistance to lateral water migration

Up to 7 bar

Pass

Permeability to radon

(4.74 × 10-13–6.36 × 10-13) m 2/s

(ISO/TS 11665-13)

Application

Application Information

Ambient air temperature

Maximum

+45 °C

Minimum

+5 °C

Substrate temperature

Maximum

+60 °C

Minimum

+5 °C
Application steps

APPLICATION

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.

IMPORTANT

Exposure to UV or weathering

The Product is not resistant to permanent UV exposure or weathering.

  1. Protect as soon as possible but not later than 90 days after application

For information on application, refer to the following Sika® method statement:

  • Method Statement - SikaProof® A+

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