Product Data Sheet Show all documents

Sikaplan®-974

(formerly MSeal 974)

POLYPROPYLENE DRAIN BOARD SYSTEM

Sikaplan®-974 is part of a series of polypropylene drain board systems that significantly reduce the amount of water coming into contact with the waterproofing membranes, relieve hydrostatic pressure, and extend the life of the waterproofing system.

Sikaplan®-974 is a cost-effective, high-strength polymeric core and non-woven geotextile filter fabric for vertical installations at shallower depths where moderate compressive strengths and flow capacity are adequate.

  • High-impact polypropylene core provides the toughest drain system available
  • Dimpled core construction helps produce high water-flow rates
  • Fully bonded geotextile fabric prevents blockage of the core
  • Water-flow control relieves hydrostatic pressure on buildings and extends the life of waterproofing systems
Product Data Sheet Show all documents

Usage

  • Retaining walls
  • Tunnel construction
  • Bridge abutments
  • Vertical substrates
 

Advantages

  • High-impact polypropylene core provides the toughest drain system available
  • Dimpled core construction helps produce high water-flow rates
  • Fully bonded geotextile fabric prevents blockage of the core
  • Water-flow control relieves hydrostatic pressure on buildings and extends the life of waterproofing systems

Packaging

4 by 50 ft (1.2 by 15.2 m) rolls

Color

Black

Product Details

Product Information

Chemical Base

Material (filter fabric): Nonwoven Polypropylene

Thickness

0.40 in (10 mm)

(ASTM D 1777)

Weight

Roll weight: 56 lbs (25 kg)

Core weight:

2.45 oz/ft2 (750 g/m2)

(ASTM D 3776)

Weight typical:

4.0 oz/yd2 (135 g/m2)

(ASTM D 5261)
Technical Information

Resistance to Static Puncture

Puncture strength

65 lbs (0.29 N)

(ASTM D 4833)

Compression resistance

11,000 psf (550 kN/m2)

(ASTM D 1621, modified)

Tensile Strength

Grap tensile

110 lbs (0.49 N)

(ASTM D 4632)

Elongation

50%

(ASTM D 4632)

Burst Strength

Mullen burst

215 psi (1,482 kPa)

(ASTM D 3786)

Tear Strength

Trapezoidal tear

50 lbs (0.22 N)

(ASTM D 4533)

Flow Rate

140 gpm/ft2 (5690 L/min/m2)

(ASTM D 4491)

Composite System

Water-flow rate (V)

18 gal/min/ft (223 L/min/m)

(ASTM D 4716)

Opening size

Apparent opening size

70 sieve size (0.21 mm)

(ASTM D 4751)

Permeability to Water Vapor

2.0 sec−1 (2.0 sec−1)

(ASTM D 4491)

UV Exposure

70% (500 hrs)

(ASTM D 4355)

Application

Consumption

Coverage

200 ft2 (18 m2 ) per 4 by 50 ft
(1.2 by 15.2 m) roll

 
Application steps

SUBSTRATE PREPARATION

Surfaces to receive drain board should be relatively smooth and free of sharp or protruding objects.

APPLICATION

Installation on Vertical Surfaces

  1. Install Sikaplan®-974 with the filter fabric side facing away from the wall so that backfill will be placed against the fabric. Cut panels to appropriate size using utility knife or scissors.
  2. To install all panels, use a suitable bonding system that is compatible with the substrate. Typical installation of Sikaplan®-974 over a cured waterproof membrane requires using an adhesive, two-sided mastic tape or a suitable Sika sealant to hold the board in place. Backfilling at the end of installation completes the permanent placement.
  3. To install panels longitudinally, start the first lift of drain panel at the bottom of the application area to ensure sound drainage. Install the next lift of drain panel by overlapping the panel’s flat tab section onto the previously installed drain board. Complete the attachment by pulling the excess filter fabric down over the previously installed panel. This installation method will automatically create a step-down (shingle fashion) lap to properly drain water. Enclose all ends of the drainage panel with the attached fabric. Wrap the fabric over top drain board to prevent earth infiltration. The bottom of the panel should be placed behind the discharge pipe.
  4. To install panels vertically, follow the same procedure for overlapping the panels. Work from one side of the application area to the other, keeping the fabric side out and the lap consistent.
  5. Ensure that fabric covers all exposed core edges.
  6. Place backfill as soon as possible after installation. Take care not to damage the drain panels during backfilling.

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