Waterproofing Membranes in Pakistan — Types, Uses, Prices & How to Choose the Right One

A complete guide for homeowners, contractors, and engineers — written by Pakistan’s only local manufacturer of modified bitumen membranes.

Atactic Polypropylene (APP) modified bitumen is the most commonly specified membrane in Pakistan’s hot climate zones — Lahore, Karachi, Multan, Faisalabad, and most of Punjab and Sindh. The APP polymer added to the bitumen gives it significantly improved heat resistance compared to unmodified bitumen, making it suitable for Pakistan’s flat rooftops that routinely reach surface temperatures above 60°C in summer.

APP membranes are torch-applied — a propane flame heats the underside of the roll and the prepared substrate simultaneously, causing the bitumen to flow and bond on contact. They are reinforced with polyester fabric (typically 140g to 180g per square metre) that gives the membrane tensile strength and prevents tearing during application and in service.

Eurobit products: EuroProof P3, P4, P5 (plain) · EuroProof G-P3, G-P4 (granule) · EuroProof AL-P3, AL-P4 (aluminium). Up to 10 years written warranty. Available in 1m × 10m rolls from 36kg to 60kg depending on thickness.

Styrene Butadiene Styrene (SBS) modification gives bitumen rubber-like properties. An SBS membrane can stretch to approximately three times its original length before tearing — compared to APP which is stiffer and more plastic in behaviour. This elasticity makes SBS membranes the preferred choice for applications where significant structural movement is expected: hillside properties in Islamabad and KPK, basements with active hydrostatic pressure, earthquake-zone construction, and re-roofing over existing surfaces that may crack further.

SBS also outperforms APP at low temperatures — remaining flexible and crack-resistant down to temperatures well below freezing. For properties in Islamabad, Murree, Abbottabad, and other elevated regions of Pakistan, SBS is the technically correct specification.

Eurobit products: EuroProof EP3, EP4, EP5 (plain) · EuroProof E-G3, E-G4 (granule) · EuroProof E-AL3, E-AL4 (aluminium). Up to 10 years written warranty. Same roll dimensions as APP range.

Self-adhesive membranes eliminate the need for a propane torch entirely. The back of the roll is coated with a pressure-sensitive adhesive protected by a release liner. To apply, you peel the liner and press the membrane onto a primed surface. The result is the same waterproofing performance as torch-applied membranes but without any open flame — making self-adhesive membranes essential wherever fire risk, restricted access, or tight confined spaces make torch application impractical or prohibited.

In Pakistan, self-adhesive membranes are increasingly specified for basement walls before backfilling — where access is limited and torch work near timber formwork creates fire risk — as well as for manholes, retaining wall interiors, and re-roofing projects over existing surfaces.

Eurobit products: EuroStick SA-1.70 (1.7mm, 1m × 15m rolls) · EuroStick SA-2.00 (2.0mm, 1m × 15m rolls). Both SBS modified, polyester reinforced, up to 10 years warranty.

Liquid-applied membranes are applied as a liquid — using brush, roller, or spray — and cure in place to form a seamless, jointless waterproofing layer. They are excellent for complex geometries, irregular surfaces, areas with many pipe penetrations, and surfaces where sheet membranes cannot easily conform to shape. Globally, liquid-applied membranes hold the largest market share at over 64% of total membrane volume — primarily because of their versatility and ease of application on complex structures.

In Pakistan, liquid membranes are widely used for bathroom waterproofing, water tank lining, balcony waterproofing, and as a complementary system alongside sheet membranes on detailed areas. Common types in Pakistan include acrylic-based, polyurethane (PU), and polymer-modified cementitious slurries.

Crystalline waterproofing is technically not a membrane in the traditional sense — it does not form a layer on the concrete surface. Instead, it penetrates into the concrete and reacts with moisture and calcium silicate compounds to grow insoluble crystals inside the capillary pores and micro-cracks of the concrete itself. These crystals permanently block water movement through the concrete matrix.

The critical advantage in Pakistan is that crystalline treatment cannot be pushed off the surface by hydrostatic water pressure — because it is part of the concrete, not applied on top of it. This makes it the only viable internal waterproofing solution for Islamabad’s basements facing sustained clay-soil water pressure, and for any existing basement where external waterproofing is inaccessible.

Eurobit product: Europroof Crystal — crystalline waterproofing for negative side coating. Applied at 1.2-1.8 kg/m² in 2 coats. Available in 25kg bags.

Siloxane and silicone-based impregnation coatings are not membranes in the structural sense — they are low-viscosity liquids that penetrate into brick, concrete, and stone masonry surfaces and chemically bond to make the material hydrophobic. Unlike surface coatings which sit on top of the wall, impregnation treatments are invisible after application — the wall looks exactly the same but repels water from the surface.

In Pakistan these are most relevant for Islamabad’s CDA sector properties where wind-driven rain penetrates old brick masonry walls, and for boundary walls and external facades in all cities where surface efflorescence (safedi) indicates lateral moisture movement through the masonry face.

Eurobit product: Euro Gard-700 — one-component solvent-based siloxane water repellent impregnation. Applied at 0.3-0.5 kg/m² per coat. Available in 5L, 25L, and 200L.

1. Location & Climate

Lahore, Karachi, Punjab: APP modified membranes — heat resistance is the priority. Islamabad, KPK, northern Pakistan: SBS modified membranes — low-temperature elasticity matters. Both: SBS self-adhesive for below-grade applications.

2. Application Type

Flat rooftop: APP or SBS torch-applied. Basement (new): Self-adhesive externally before backfill. Basement (existing): Crystalline internally. Bathroom/wet area: Liquid cementitious slurry. Water tank: Food-grade liquid slurry.

3. New Build vs Repair

New construction: 3mm or 4mm APP/SBS as base layer. Repair of lightly cracked roof: 4mm APP or SBS over prepared surface. Severely cracked or failed existing system: 5mm APP or SBS, crack filling first. Re-roofing without demolition: self-adhesive over existing primed surface.

4. Surface Exposure

Covered (under screed or protection board): Plain surface APP or SBS. Exposed to sun and weather: Granule or aluminium surfaced. Exposed with heat reduction priority: Aluminium surfaced — measurably lowers roof surface temperature and indoor heat.