Product Center Waterproof Membrane

Self-Adhesive Polymer Modified Bituminous Waterproofing Membrane

The LW-J501 self-adhesive polymer-modified bitumen waterproofing membrane is made with a polyester base as reinforcement and a coating of polymer-modified bitumen containing styrene-butadiene-styrene (SBS), styrene-butadiene rubber (SBR), and functional additives. The upper surface is covered with a polyethylene (PE) film or a peelable silicone release film, and the lower surface is coated with a peelable silicone release film. This membrane features cold self-adhesion, cold application, and environmentally friendly properties.

Product Features

Title	Details
Excellent Temperature Resistance	Outstanding performance under both high and low temperatures.
Strong Adhesion	Good bonding strength and stable waterproof performance.
Easy Application	Simple installation process with long-lasting waterproof protection.

Standards

Title	Details
Execution Standard	GB 23441-2009 Self-Adhesive Polymer Modified Bitumen Waterproof Membrane (Type PY).

Scope of Application

Title	Details
Applicable Areas	Suitable for non-exposed waterproofing and damp-proofing works in basements, subways, tunnels, water tanks, and various parts of civil buildings.

Product Specifications

Title	Details
Roll Length	10 m
Roll Width	1 m
Roll Thickness	3.0 mm, 4.0 mm
Surface Material	Polyethylene film (PE); Double-sided self-adhesive without film (D).

Transportation & Storage

Title	Details
Storage Conditions	Different types and specifications should be stacked separately to avoid mixing. Protect from sunlight and rain, keep ventilated. Storage temperature ≤ 45℃. When stored horizontally, stack no more than 5 layers; when stored vertically, stack only a single layer.
Transportation Precautions	Prevent tilting or lateral pressure during transport, cover with tarpaulin if necessary. Avoid impacts or dropping. When standing rolls, stack no more than 2 layers.
Shelf Life	Under normal storage and transportation conditions, shelf life is at least 1 year from the production date.

Construction Method

Title	Details
Dry Application	Base surface treatment → Apply primer → Snap lines for positioning and pre-lay membrane → Lay additional membrane layer → Lay LW-J501 waterproof membrane → Overlap seams → Fix and press edges → Organize inspection and acceptance.
Wet Application	Base surface treatment → Snap lines for positioning and pre-lay membrane → Prepare cement slurry → Lay additional waterproof membrane layer → Lay LW-J501 waterproof membrane while applying cement slurry → Overlap seams → Fix and press edges → Organize inspection and acceptance.

Precautions

Title	Details
Base Requirements	For dry application, the substrate must be flat and dry, and primed with a dedicated treatment agent. Construction should be carried out within a temperature range of 4℃–45℃.
Protection After Laying	After laying and inspection, the membrane should be protected as soon as possible to avoid exposure and physical damage.
Repairing Damage	Damaged areas must be cleaned and repaired with LW-J501 self-adhesive membrane, overlapping at least 100 mm with the surrounding material.

More related products