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RIW Gas Seal HC

Verified by manufacturer 19 days ago

RIW

Gas Seal HC is a multi-layered, blended polyethylene membrane for protection against ground gas and hydrocarbons.

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Application

Suitable for use as a combined ground floor damp proof membrane and hydrocarbon/ gas barrier.

Description

A 0.5 mm-thick, multi-layered, blended polyethylene smooth sheet, typically used as a gas barrier and damp proof membrane in concrete floors below the slab or where additional protection from hydrocarbons and VOCs are required.


Features and benefits:

  • Hydrocarbon, methane, carbon dioxide, radon and VOC barrier.
  • Manufactured from virgin material, not recycled waste.
  • Separate damp proof membrane not required.
  • Robust jointing and sealing system.
  • High puncture resistance.
  • Welded joints possible.
  • Complies with latest code of practice as published by CIRIA and BRE.
  • Compliant with BS 8485:2015.


Accessories:

A range of accessories are available (specified separately):

  • RIW Gas Seal GR DPC: Gas resistant damp proof course/ cavity tray, 450, 600 or 900 mm wide.
  • RIW Gas Seal Pipe Collar: Pre-fabricated ‘top-hats' for sealing around pipe penetrations. Available in 100, 130 and 160 mm diameters.
  • RIW Gas Seal Tape HC: Double-sided self-adhesive butyl tape, 100 mm wide, for sealing between overlaps in the membrane.
  • RIW Lap Tape RB: Self-adhesive polymer/ bitumen compound with polypropylene woven mesh, 75 mm wide, for sealing edges of lapped product.
  • RIW Pre-Formed Gas Cloaks: Pre-fabricated units for internal/ external corners and door reveals.

General information

Color

Silver

Finish

Embossed

Other

Material

Polyethylene

Shape

Rectangle

Other

Length

50000 mm

Width

2000 mm

Height

0.5 mm

Warranty description

Ten year

Uniclass

Pr_25_57_65_60 Plastics sheetsPrimary

CAWS

J40/35 Loose-laid plastics or rubber gas-retardant membranes

J40/140 Loose-laid plastics or rubber sheet gas-retardant membranes

Specification data - Plastics sheets

Material

Multi-layered, blended polyethylene.

Purpose

Gas retardance, damp-proof membrane.

Standard

To BS 8485.

Performance characteristics

-

Tensile strength (minimum)

To BS EN 12311-1, >550 N/50mm².

Tear resistance

Tear resistance (to EN 12310-1): >300 N.

Resistant to underground gases

Methane.

Guidance for specification option:

Methane permeability (to BS ISO 15105-1): 0.13 ml/m²/day/atmosphere.

Physical properties

-

Colour

Black and grey.

Dimensions

-

Thickness (minimum)

0.5 mm.

Width (minimum)

2.0 m.

Roll length (minimum)

50 m.

Recycled content

None – virgin material.

Product Reference

RIW Gas Seal HC

Sealed Laps

150 mm.

Tensile elongation property

To EN 12311-1, 400%.

Water vapour transmission

To BS EN 1931, 0.14 g/m²/day.

Sustainability data

Recycled content

As defined in clause 7.8 of BS EN ISO 14021

0 %

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