Sika Liquid Plastics Roofer London
Approved Sikalastic & Decothane Liquid Waterproofing Contractor
Developed over 50 years of elastomer chemistry in Preston, Lancashire, Sika Liquid Plastics (including Sikalastic and Decothane Moisture-Triggered Polyurethane systems) is a single-component, cold-applied liquid membrane engineered to outlast傳統 sheet coverings across complex London flat roofs. Curing rapidly upon contact with atmospheric moisture to form a seamless, joint-free elastomeric skin, Sika Liquid Plastics eliminates vulnerable lap welds, naked gas torches, and water tracking on residential roof terraces, podium decks, and commercial plant roofs.
SIKA LIQUID PLASTICS FLAT ROOFING & REPAIRS
Roofer London Sika Liquid Plastic System
Where multi-penetration flat roofs, awkward parapet gutters, or architectural glass roof lanterns defeat conventional roll-out membranes, Sika Liquid Plastics moulds around every upstand without a single welded joint.
REEMAT GLASS-FIBRE REINFORCED QUALITY
We apply Sika Liquid Plastics as a multi-coat laminate: a high-build base embedment coat saturates and locks into Sika Reemat Premium隨機 chopped-strand glass-fibre matting, followed by a UV-stable elastomeric topcoat. The cured membrane holds full British Board of Agrément (BBA Certificate 16/5294) and European Technical Assessment (ETA) accreditation.
Benefits of Sika Liquid Plastics
Sika Liquid Plastic Roofer London
ZERO-FLAME COLD APPLICATION SAFETY
Because Sikalastic and Decothane resins are cold-applied by brush, roller, or airless spray, our operatives never bring naked bitumen gas flames or hot-air guns near dry Victorian roof timbers or occupied buildings. Once cured, the membrane achieves full BROOF(t4) external fire resistance in accordance with BS 476 Part 3 and EN 1187 Test 4.
PMMA & POLYURETHANE WALKWAY DURABILITY
Combining moisture-triggered polyurethane and fast-curing polymethyl methacrylate (PMMA) resin technologies with polyester or glass-fibre fleece reinforcement, Sika Liquid Plastics withstands thermal shock, ponding water, and heavy pedestrian foot traffic across London walkways, balconies, and communal access stairs.
Approved Sika Liquid Plastics Contractor
Sika Liquid Plastic Roofer London
ELASTOMERIC CRACK-BRIDGING FLEXIBILITY
Unlike rigid GRP fibreglass resins that fracture when timber joists or concrete slabs flex, Sika Liquid Plastics retains permanent elasticity across sub-zero winters and summer heatwaves, bridging substrate movement and encapsulating ageing asphalt, felt, or fragile cementitious profiles without stripping the entire roof structure.
SIKA TECHNICAL SIGN-OFF & 25-YEAR WARRANTIES
Every registered Sika Liquid Plastics project we deliver is inspected on site by Sika’s own technical surveyors to verify wet-film thickness and detailing compliance, unlocking a 15-to-25-year Sika material guarantee alongside our 10-year insurance-backed workmanship guarantee.
IDEAL FOR COMPLEX & ENCAPSULATED ROOFS
Sika Liquid Plastic Flat Roofer London
Sikalastic polyurethane coatings provide a lightweight, high-adhesion waterproof barrier over corroded metal-profiled commercial roofs and ageing fibre-cement or asbestos-cement sheets. By encapsulating weathered corrugated sheeting in situ, Sika Liquid Plastics halts water ingress and locks down airborne fibres without the cost, disruption, or environmental hazard of stripping and disposing of the roof deck while building occupants remain working below.
Call our Kensington office today on 020 7205 4557 to arrange a free Sika Liquid Plastics flat roof survey.
Frequently Asked Questions: Sika Liquid Plastics Roofer London
Can Sika Liquid Plastics be applied over existing felt, asphalt, or metal roofs?
Yes. Following moisture-mapping core samples and pull-off adhesion tests, Sika Liquid Plastics can be primed and cold-applied directly over sound mastic asphalt, mineral felt, concrete, or profiled metal decks, avoiding the cost and disruption of a full strip-out.
How quickly does Sika Liquid Plastics become rain-resistant after application?
Because Sikalastic and Decothane resins are moisture-triggered rather than reliant on solvent evaporation, the coating skins over and becomes completely rain-resistant within minutes of application—a vital advantage when waterproofing occupied London properties during changeable British weather.
Our Sika Liquid Plastics Work Across London

Specialist Flat Roofing Installers in London
Sika Sarnafil Flat Roofing
Sarnafil is a flat-roofing provider that makes market-leading single-ply roofing membranes. All Sarnafil installations are covered by our 10-year workmanship guarantee, as well as Sarnafil’s own, which ranges from 10 to 25 years dependent on thickness.

Specialist Flat Roofing Installers in London
EPDM Flat Rubber Roofing
Vulcanised one-piece and fleece-backed EPDM rubber membranes provide flame-free, permanent waterproofing with a 40-to-50-year service life across London extensions, dormers, and roof terraces, backed by our 10-year workmanship guarantee.

Specialist Flat Roofing Installers in London
IKO Polymeric Flat Roofing
IKO offer a variety of rubber membranes for flat roofs aimed at providing exceptional waterproofing, UV protection and durability while remaining affordable over a highly durable life span. All of this culminates in a finish that is both effective and aesthetically pleasing.

Specialist Flat Roofing Installers in London
Sika Liquid Plastics Flat Roofing
The Sika Liquid Plastic guarantee offers up to a 25 year guarantee on works using Sika products, which is further backed by the fact a Sika Surveyor will come out to each work and assess that it reaches their quality assurance standards, offering you peace of mind. Increased even further by our 10 year workmanship guarantee.

Specialist Flat Roofing Installers in London
Garland Flat Felt Roofing
Working closely with Garland UK, we can offer Industry-Leading Single-Point Guarantees, removing any doubt or concern and accepting full liability for the design, material, and quality of the installation workmanship on every Garland UK project carried out by our team.

Specialist Flat Roofing Installers in London
Sikabit Pro Flat Roofing
Sikabit is a a Pro Bituminous Membrane designed to have market leading waterproofing, durability and UV protection over its long enduring life span, as well as boasting exceptional fireproofing both during and after application.

Specialist Flat Roofing Installers in London
Wolfin Single Ply Roofing
WOLFIN’s single-ply membranes have been tried and tested for 50 years, using the same unique composition.















