Wavin Bidim® Geotextile Fabric

100% polyester nonwoven geotextiles — filtration, drainage, and soil reinforcement

Bidim aplicado em base de pavimento rodoviário vista 2

Geocomposto Bidim + dreno PEAD em estúdio vista 3

Bidim aplicado em lastro de ferrovia vista 4

Bidim aplicado em talude lateral de rodovia vista 5

GT7 Line

4.7 kN/m — Filtration

RT16 Line

16 kN/m — Medium reinforcement

RT31 Line

31 kN/m — Heavy reinforcement

CC10 Line

5 kN/m — Curing & protection

VP05 Line

98 N — Waterproofing

100% polyester nonwoven geotextile mats with full traceability for filtration, separation, drainage, and soil reinforcement. GT, RT, CC, and VP lines offer a 25% cost reduction compared to traditional systems.

Need a drain with a built-in filter? Check out the Techdreno KC

Downloads Catálogo Geral Bidim (Geossintéticos) PDF — Portfólio completo Wavin

The Problem

Drainage systems using gravel and sand require large volumes of material, heavy-duty transportation, and time-consuming installation. Low-quality geotextile mats, made from a cotton blend, degrade rapidly in acidic soils or when exposed to chemicals, compromising the entire project.

The Wavin Bidim® Geotextile Fabric Solution

Bidim© Wavin is made of 100% pure needle-punched polyester—with no cotton blend. It offers indefinite resistance to acids, alkalis, oils, solvents, and roots. Full traceability is ensured by the original Bidim brand, guaranteeing the quality the market demands. Costs are reduced by up to 25% compared to traditional systems using gravel or sand.

Bidim® fabric specifications

Technical data of Wavin Bidim® Geotextile Fabric

Type	Resistance	Raw Material	Dimensions
GT7	4.7 kN/m	Polyester	2.30 or 4.60 m x 100–200 m
RT7	7 kN/m	Polyester	2.30 or 4.60 m x 100–200 m
RT8	8 kN/m	Polyester	2.30 or 4.60 m x 200 m
RT9	9 kN/m	Polyester	2.30 or 4.60 m x 200 m
RT10	10 kN/m	Polyester	2.30 or 4.60 m x 200 m
RT14	14 kN/m	Polyester	2.30 or 4.60 m x 150 m
RT16	16 kN/m	Polyester	2.30 or 4.60 m x 150 m
RT21	21 kN/m	Polyester	2.30 or 4.60 m x 150 m
RT26	26 kN/m	Polyester	2.30 or 4.60 m x 150 m
RT31	31 kN/m	Polyester	2.30 or 4.60 m x 100 m
CC10	5 kN/m	Polyester	2.10 m x 300 m
ExtraDren	200 kPa	Polypropylene	2.00 m x 20 m
VP05	98 N	Polyester	1.00 m x 200 m

Bidim geotextile standards: NBR 12568 (mass per unit area) · NBR 12569 (thickness) · NBR 12824 (tensile strength, already tabled above by line) · NBR 13359 (puncture, CBR piston) · NBR ISO 11058 (permeability) · NBR ISO 12956 (filtration opening, O95).

How to specify Bidim in a project spec sheet

The 4 properties a drainage or filtration project needs to state, and the standard governing each one.

Property	Standard	What it determines
Filtration opening (O95)	NBR ISO 12956	Largest soil particle the fabric retains
Permeability (k)	NBR ISO 11058	How fast water passes through the fabric
Tensile strength	NBR 12824	Already tabled by line on this page (GT7 to RT31)
Puncture resistance (CBR piston)	NBR 13359	Resistance to puncture from stones or roots during installation

Don't confuse: waterproofing veil × drainage fabric

The VP line is a veil for waterproofing — used under asphalt membranes or geomembranes, protecting against puncture and distributing stress. It doesn't replace a waterproofing membrane, it protects one. The GT and RT lines, on the other hand, are geotextiles for filtration and drainage: they retain soil particles while letting water through — the fabric that wraps drain pipes and reinforces subdrainage systems.

Geotextile sleeve × Techdreno KC®: which to use

If the project has already settled on a drain pipe with a fabric sleeve — fine or clayey soil, or uncertainty about the ground — the ready-made Bidim geotextile sleeve (2 to 10 inch sizes) is the most practical way to apply it. If the priority is a simpler material list on site, Techdreno KC® already comes with geotextile built in via micro-slits, skipping the sleeve — but it works best in sandy or coarse-grained soil.

VP05 (also searched as "VP50"): the manufacturer's official code is VP 05 — the "05" refers to the line's 50 g/m² weight, used as waterproofing reinforcement (not to be confused with the RT/GT/CC lines, which are for drainage and filtration and are not specified by weight).

Why choose Bidim geotextile

100% Pure Polyester

Total Chemical Resistance

Full Traceability

25% More Economical

Multiple Lines

Integrated ExtraDren

Where to use Bidim® geotextile fabric

Where Wavin Bidim® Geotextile Fabric makes the difference

Agribusiness

Agricultural Drainage

Filter wrap for subsurface drainage pipes

View segment

Infrastructure

Highways and Roads

Layering and subbase reinforcement in paving

View segment

Energy

Photovoltaic Power Plants

Soil protection and erosion control on platforms

View segment

Infrastructure

Railroads

Ballast separation and filtration in railway construction projects

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FAQ

Common questions about Wavin Bidim® Geotextile Fabric

Bidim is a needle-punched nonwoven fabric, ideal for filtration and drainage because it maintains uniform porosity. Woven geotextiles are better for soil reinforcement, but they filter less effectively. Bidim combines both functions in its RT series.

Yes. Bidim sleeves are available in sizes ranging from 2 to 10 inches, ready to be wrapped around drainage pipes. A more practical alternative is Techdreno KC, whose micro-slots need no wrapping fabric on the pipe.

GT for general filtration and drainage, RT for soil reinforcement with high tensile strength (up to 31 kN/m), CC for concrete curing (reusable at least 4 times), and VP as a waterproofing membrane.

Yes. Because it is made of 100% polyester, Bidim is resistant to acids, alkalis, oils, solvents, and biological agents in the soil. It does not decompose due to microorganisms or roots.

Varies by product line: from 4.7 kN/m (GT7, light filtration) to 31 kN/m (RT31, heavy reinforcement). ExtraDren withstands 200 kPa of compression for subdrainage.

Yes. Bidim is widely used in landfills as a filtration, separation, and protective layer for geomembranes. Chemical resistance is essential in this harsh environment.