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Pre-Compressed Joint Sealant for Expansion and Movement Joints
Tremco’s Willseal product range provides innovative joint sealing solutions engineered to protect buildings against water, air, and environmental infiltration. Willseal specialises in pre-compressed, self-expanding foam sealants that expand in place to form a continuous, durable seal. These systems are engineered to accommodate structural movement while maintaining watertight, airtight, and reliable protection.
Featured Products
Explore this selection of top-performing products, specifically curated to meet the exacting standards of architects, contractors and builders. Like all of our products, these innovation solutions have been rigorously tested for durability, efficiency and longevity.
Willseal Protector Plate™ - Hinged
Cover plate system designed for covering expansion joint openings without conventional block-outs.
Willseal Protector Plate™ - Pedestrian
ADA-compliant aluminium cover plate designed for applications subjected to heavy pedestrian traffic.
Willseal® 150
Pre-compressed, self-expanding foam joint seal, engineered to perform as a highly flexible, weathertight, primary seal in vertical exterior applications.
Willseal® 250
Pre-compressed, self expanding open micro-cell polyurethane foam impregnated with a hydrophobic, acrylic polymer sealing compound coated with a factory-applied silicone sealant.
Willseal® 250-B
Pre-compressed, self-expanding foam joint sealant with a highway grade silicone coating engineered to perform in primary horizontal applications such as road and bridge joints
Willseal® 250-R
Patent-protected expansion joint system that combines the performance and reliability of Willseal 250 with reinforcing membranes positioned beneath the sealant face to support higher point loads.
Willseal® Color Coreseal H
Lightweight, closed-cell ethylene vinyl acetate (EVA) copolymer foam with a factory-applied traffic-rated sealant coating
Willseal® Color Coreseal V
Lightweight, closed-cell ethylene vinyl acetate (EVA) copolymer foam with a factory-applied sealant coating.
Willseal® Coreseal
Lightweight, closed-cell ethylene vinyl acetate (EVA) copolymer foam.
Willseal® FR-V
Sound-attenuating fire-rated expansion seal with an integral smoke barrier within the foam body and a pre-cured, factory-applied sealant coating on the face.
Willseal® PF100
Pre-compressed, self-expanding foam joint seal, engineered to perform as a weathertight primary seal in various prefabricated applications.
Willseal® PF200
Pre-compressed, self-expanding foam joint seal, engineered to perform as a weathertight primary seal in various prefabricated applications.
Willseal® Seismic
Pre-compressed, self-expanding foam joint seal with a factory-applied, silicone sealant face. It is designed to provide a watertight, dust proof, noise reducing, thermally insulating, UV stable primary seal in vertical applications.
Willseal® Seismic HS
Pre-compressed, self-expanding foam joint seal with a factory-applied, silicone sealant face.
Willseal® STC
Compressible type of joint sealant for use in static applications where interior sound control is needed.
Willseal® WJS
Waterproof expansion joint system that combines an elastoprene rubber seal with Willcrete, an impact absorbing elastomeric concrete, to create a continuous seal with concrete decks.
Willseal products are developed to meet the highest standards of performance and durability, making them suitable for even the most demanding environments.
Key benefits include:
- Watertight, airtight, and weather-resistant sealing
- Excellent movement capability for dynamic joints
- Long-term durability and UV resistance
- Flexible solutions for vertical and horizontal applications
- Reliable performance across a wide range of substrates
Willseal products are supplied in a pre-compressed state and expand once installed to fill the joint completely. This creates a continuous, flexible seal that adapts to movement and maintains long-term performance without the need for invasive anchoring.
The foam sealants are typically impregnated with advanced sealing compounds and sealed with protective coatings, ensuring resistance to moisture, temperature changes, and environmental exposure.
Willseal solutions are suitable for a wide range of construction and infrastructure applications, including:
- Expansion and movement joints in buildings
- Precast concrete, and masonry systems
- Horizontal and vertical joint sealing
- Parking structures, plazas, and stadiums
- Bridges, roads, and infrastructure projects
These systems are designed to accommodate joint movement while maintaining a watertight seal in both static and dynamic structures.
Willseal products are engineered to deliver reliable performance under challenging conditions:
- Designed to withstand thermal, seismic, and structural movement
- Resistant to water, UV exposure, and environmental conditions
- Provides effective insulation against sound and air infiltration
- Suitable for both new builds and refurbishment projects
This ensures sustainable, long-term protection for critical building joints.
