GET A FREE QUOTE
Talk to an expert.
Our technical team will assess your requirement, recommend the right solution, and send you a detailed quote — at no cost.
An ESCO recognized leader in the industry
Request your free quote
Fill in the form and we will be in touch within 24 hours.
Request received!
Our team will review your details and get back to you within 24 hours.
Areas of Application
Concrete Gap Filler
Star Expansion Shield
Premium Concrete Gap Filler for Expansion & Construction Joints
Star Expansion Shield is a premium concrete gap filler built for expansion and construction joints that move with the structure. Designed for contractors, builders, and facility owners, it seals gaps in concrete, stone, brickwork, and metal while staying flexible enough to absorb daily thermal movement.
Unlike rigid, crack-prone fillers, this concrete gap filler keeps its bond and shape for years. Its watertight, weather-resistant formula stops moisture before it becomes a structural problem, and built-in anti-fungal and anti-bacterial additives keep joints hygienic even in damp or humid conditions.
Benefits: How Star Expansion Shield Solves Everyday Joint Problems
- Elastomeric, flexible formula — Stretches and recovers with joint movement instead of cracking under stress.
- Strong multi-surface adhesion — Bonds securely to concrete, plaster, brick, stone, and metal substrates.
- Low shrinkage on drying — Keeps its shape and fills volume, so joints stay sealed without sinking.
- Ready-to-use paste — Non-flowing consistency needs no mixing, so application starts right out of the container.
- Water-dilutable and easy to apply — Works cleanly with a scraper, knife, or blade for fast, tidy finishing.
- Anti-fungal, anti-bacterial protection — Resists mould and bacterial growth in damp or humid joint conditions.
GET A FREE QUOTE
Talk to an expert.
Our technical team will assess your requirement, recommend the right solution, and send you a detailed quote — at no cost.
An ESCO recognized leader in the industry
Request your free quote
Fill in the form and we will be in touch within 24 hours.
Request received!
Our team will review your details and get back to you within 24 hours.
The Problem
3 Problems Without Proper Expansion Joint Protection
Water Ingress Through Joints
Unsealed joints allow water and moisture to penetrate the structure.
Cracking & Joint Movement
Rigid or ordinary fillers may fail when concrete expands, contracts, or shifts.
Structural Deterioration
Trapped moisture can weaken bonds and accelerate damage to surrounding concrete and surfaces.
Benefits
Benefits: How Star Expansion Shield Solves Everyday Joint Problems
Star Expansion Shield is a flexible concrete gap filler designed for expansion and construction joints. It seals gaps in concrete, stone, brickwork, and metal while accommodating thermal movement. Its watertight and weather-resistant formula helps prevent moisture ingress, cracking, and joint deterioration.
Long-Term Protection Against Water and Wear
Star Expansion Shield's flexible design means fewer callbacks, since it absorbs structural movement instead of resisting it until failure. As a lasting concrete gap filler, it protects joints through seasonal swings, keeping water out and structural integrity intact for years.
Consistent Adhesion Across Mixed Substrates
Many projects combine concrete, brick, stone, and metal in one joint line, and inconsistent bonding is a common failure point. This filler for concrete gaps adheres reliably across all these surfaces, so applicators avoid juggling separate products for each material.
Reduced Rework From Shrinkage
Standard fillers often shrink noticeably after curing, leaving gaps that need a second application. With its low shrinkage formulation, Star Expansion Shield fills gaps between concrete slabs once and keeps that volume, cutting down on follow-up visits and wasted material.
Faster, Simpler Application
Because it arrives ready to use, crews save time and skip the mess of mixing components. As a wall gap filler and floor joint sealant, it applies straight from the container with common tools, keeping schedules tight on any project size.
Cleaner Finish With Water-Based Convenience
Water dilutability makes cleanup and tool maintenance easier than solvent-based alternatives, without compromising the seal. This matters on busy job sites, where a concrete gap filler that cleans up with plain water keeps workflows efficient and tools in good shape.
Healthier Joints in Damp Environments
Basements, bathrooms, and exterior joints trap moisture, inviting fungal and bacterial growth inside the fill material itself. Built-in anti-fungal and anti-bacterial additives keep the joint hygienic over time, an advantage for filling gaps between concrete slabs in humid, below-grade spots.
How to Apply
Method of Application
Applying Star Expansion Shield is straightforward
Surface Preparation
Clean the joint thoroughly, removing dust, debris, and loose material. Insert a backer rod into any cavity wider than a few millimetres to control fill depth.
Mixing
No mixing is required. Star Expansion Shield is a ready-to-use paste straight from the container, so application can begin immediately after surface preparation.
Application
Fill the joint using a scraper, knife, or blade, working the material firmly into the gap in layers of a few millimetres per pass. Tool the surface smooth and allow adequate drying time between coats before overcoating or exposing the joint to water.
Customer Stories
What Our Customers Say
FAQs
Frequently Asked Questions
Everything you need to know about Star Expansion Shield.
What is the best concrete gap filler for expansion joints?
Star Expansion Shield is formulated specifically as a flexible concrete gap filler for expansion joints, since it moves with the structure instead of cracking like rigid fillers.
Can this product be used as a wall gap filler?
Yes, Star Expansion Shield works well as a wall gap filler on interior and exterior walls, bonding securely to concrete, plaster, brick, and stone.
How do I fill gaps between concrete slabs?
Clean the joint, insert a backer rod if the gap is wide, then apply this concrete gap filler directly with a scraper or knife in layers until the slab joint is fully sealed.
Is Star Expansion Shield suitable for exterior use?
Yes, its weather-resistant formula makes it a reliable filler for concrete gaps exposed to rain, sun, and temperature changes on exterior surfaces.
Does this concrete gap filler shrink after drying?
Star Expansion Shield has low volume shrinkage after drying, so joints stay filled without the sinking or gapping common in ordinary fillers.
What tools are needed to apply this filler for concrete gaps?
A scraper, putty knife, or blade is sufficient to apply Star Expansion Shield, since it is a ready-to-use paste that requires no mixing.
How wide a gap can this concrete gap filler handle?
For narrow joints, apply directly in layers of a few millimetres; for wider cavities, insert a backer rod first so the gap filler only bridges the remaining depth.
Is Star Expansion Shield waterproof once cured?
Yes, it forms a watertight, flexible seal that prevents water ingress through expansion joints and gaps between concrete slabs.
Can this product be used on both concrete and brick joints?
Yes, Star Expansion Shield bonds reliably to concrete, brick, stone, and metal, making it a versatile concrete gap filler for mixed-substrate projects.
How long does this concrete gap filler take to cure before overcoating?
Drying time depends on temperature, humidity, and film thickness, so it is best to allow at least 48 hours before overcoating in typical conditions.
Still have questions?
Our team is happy to help with technical specs, application guidance, or a custom quote.
Contact Us