Product Data Sheet Show all documents
SikaProof® A+ 12

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 membrane thickness of 1.20 mm.

  • 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
  • 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
Product Data Sheet Show all documents

Usage

The Product is used for:
  • Damp-proofing, waterproofing and concrete protection for basements and other below ground concrete structures.
  • Can be used as a ground gas resistantmembrane 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
Suitable for use on:
  • Precast reinforced concrete structures
  • Cast-in-situ reinforced concrete structures
  • Existing reinforced concrete structures
  • Can be used as a ground gas resistantmembrane 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

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
  • 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

Roll length

1.00 m or 2.00 m

20 m

Refer to the current price list for available packaging variations.

Colour

Membrane layer

Light yellow

Bonding layer

Grey

Product Details

Sustainability / Certifications / Approvals

ENVIRONMENTAL INFORMATION

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

APPROVALS / STANDARDS

  • Agrement Certificate, SikaProof® Membranes, BBA Certificate No.13-5075

  • 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

Chemical Base

Membrane Layer

Flexible Polyolefin (FPO)

Hybrid Layer

Cement modified polymer

Shelf Life

18 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 on top of each other.

Effective Thickness

Total Thickness (=deff)

(1.75 +0.18 / -0.09) mm

Membrane Thickness

(1.20 +0.12 / -0.06) mm

Mass per unit 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

  • SikaProof® Tape A+

  • SikaProof® Sandwich Tape

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

  • SikaProof® Primer-02

  • SikaProof® Adhesive-02

  • SikaProof® A+ 12

  • SikaProof® ExTape-100

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

Resistance to Impact

≥400 mm

(EN 12691)

Tensile Strength

Longitudinal (MD) Method A

≥750 N / 50mm

Transversal (CMD) Method A

≥750 N / 50mm

Elongation at break

Longitudinal (MD) Method A

≥1100 %

Transversal (CMD) Method A

≥1100 %

Adhesion in peel

≥100 N/ 50 mm to concrete after 28 days

(DIN EN 1372)

Joint Shear Resistance

≥100 N / 50mm

(EN 12317-2)

Service Temperature

Maximum

+35 °C

Minimum

-10 °C

Water Tightness

Method B 24 h 60 kPa

Pass

Resistance to lateral water migration

Up to 7 bar

Pass

Permeability to radon

(4.74 × 10-13–6.36 × 10-13) m2/s

(ISO/TS 11665-13)

Accelerated Ageing in Alkaline Environment Tensile Strength

28 d +23 °C

Pass

Method B 24 h 60 kPa

Pass

Durability of Water Tightness against Chemicals

28 d +23 °C

Pass

Method B 24 h

Pass

Durability of Water Tightness against Ageing

12 Weeks

Pass

Method B 24 h 60 kPa

Pass

Reaction to Fire

Class E

(EN 13501-1)

Application

Application Information

Ambient Air Temperature

Maximum

+45 °C

Minimum

+5 °C

Substrate Temperature

Maximum

+60 °C

Minimum

+5 °C
Application steps

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.

APPLICATION

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:

  • Sika Method Statement: SikaProof A+

Documents