Best Polyfilla Flexible Gap Filler Gun of 2026

Last updated on 29/01/2026

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Decorators Caulk White Set - Bundle With Sealant Gun, Silicone Tool Smoothing Set And Soudal White Caulk Gap And Crack Filler Acrylic Silicone Adhesive Sealant

Decorators Caulk White Set - Bundle With Sealant Gun, Silicone Tool Smoothing Set And Soudal White Caulk Gap And Crack Filler Acrylic Silicone Adhesive Sealant

Complete caulking kit bundle.
Durable, flexible white caulk.
Suitable for all tasks.

Main Highlights

White Caulk Bundle Includes: 2x Soudal white decorators caulk silcone adhesive sealant 290ml, 1x sealant gun, 1x silicone smoothing tool set - Providing everything needed for a professional grade finish
Complete Caulking Kit: Achieve professional-grade results with our all-in-one caulking bundle, featuring Soudal white decorators caulk, a durable steel silicone gun, and a silicone smoothing tool set. Everything you need for precise, seamless caulking in one convenient package.
Seals And Protects: Soudal White Caulk has been formulated to outperform all other conventional decorating caulks and fillers as the caulk cures to form a durable, flexible seal resulting in a smooth professional finish.
Precision Application: Achieve precision accuracy with a high quality 11 inch caulking gun made from a sturdy steel frame alongside a 4 pack silicone smoothing tool kit that ensures caulk is applied with precision & to a professional-grade finish with ease every time
Suitable For All: Set ideal for beginners and experts alike who require a suitable kit for interior tasks such as doors, windows, kitchens, bathrooms, sink joints and more.

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Decorators Caulk White Set - Bundle With Sealant Gun, Silicone Tool Smoothing Set And Soudal White Caulk Gap And Crack Filler Acrylic Silicone Adhesive Sealant

Complete caulking kit bundle.
Durable, flexible white caulk.
Suitable for all tasks.

Main Highlights

White Caulk Bundle Includes: 2x Soudal white decorators caulk silcone adhesive sealant 290ml, 1x sealant gun, 1x silicone smoothing tool set - Providing everything needed for a professional grade finish
Complete Caulking Kit: Achieve professional-grade results with our all-in-one caulking bundle, featuring Soudal white decorators caulk, a durable steel silicone gun, and a silicone smoothing tool set. Everything you need for precise, seamless caulking in one convenient package.
Seals And Protects: Soudal White Caulk has been formulated to outperform all other conventional decorating caulks and fillers as the caulk cures to form a durable, flexible seal resulting in a smooth professional finish.
Precision Application: Achieve precision accuracy with a high quality 11 inch caulking gun made from a sturdy steel frame alongside a 4 pack silicone smoothing tool kit that ensures caulk is applied with precision & to a professional-grade finish with ease every time
Suitable For All: Set ideal for beginners and experts alike who require a suitable kit for interior tasks such as doors, windows, kitchens, bathrooms, sink joints and more.

Value for Money

Decorator’s Caulk White Kit – 2x Flexible Filler Tubes with Caulking Gun & 4 Multi-Edge Silicone Tool Set – Paintable White Caulk for Sealing, Repairing & Finishing – Ideal for DIY & Trade

Decorator’s Caulk White Kit – 2x Flexible Filler Tubes with Caulking Gun & 4 Multi-Edge Silicone Tool Set – Paintable White Caulk for Sealing, Repairing & Finishing – Ideal for DIY & Trade

Complete set for all projects.
Flexible and paintable for versatility.
Easy to use with precision.

Main Highlights

COMPLETE DECORATOR’S SET – Everything you need for a smooth, professional finish. Includes 2 tubes of Decorator’s Caulk White, a Caulking Gun, and a 4-piece Silicone Finishing Tool Kit – perfect for DIY or trade jobs.
FLEXIBLE & PAINTABLE FILLER – Our white caulk is flexible, paintable, and designed for a clean, seamless seal around skirting boards, window frames, and trims. Ideal for decorators, painters, and home improvement enthusiasts.
EASY APPLICATION – The caulking gun provides smooth, even pressure for precise control, reducing waste and mess. Pair with the multi-edge silicone tools for perfect joints and a professional-looking finish every time.
MULTI-SURFACE PERFORMANCE – Suitable for sealing gaps and cracks in wood, plaster, brick, or PVC. This painters caulk white adheres strongly and stays flexible after drying – no cracking or shrinking.
VALUE BUNDLE FOR DIY & PROFESSIONAL USE – A practical caulking kit for decorators, builders, and homeowners. Whether you’re sealing a bathroom, kitchen, or window frame, this decorator’s caulk set makes every job easier and cleaner.

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Decorator’s Caulk White Kit – 2x Flexible Filler Tubes with Caulking Gun & 4 Multi-Edge Silicone Tool Set – Paintable White Caulk for Sealing, Repairing & Finishing – Ideal for DIY & Trade

Complete set for all projects.
Flexible and paintable for versatility.
Easy to use with precision.

Main Highlights

COMPLETE DECORATOR’S SET – Everything you need for a smooth, professional finish. Includes 2 tubes of Decorator’s Caulk White, a Caulking Gun, and a 4-piece Silicone Finishing Tool Kit – perfect for DIY or trade jobs.
FLEXIBLE & PAINTABLE FILLER – Our white caulk is flexible, paintable, and designed for a clean, seamless seal around skirting boards, window frames, and trims. Ideal for decorators, painters, and home improvement enthusiasts.
EASY APPLICATION – The caulking gun provides smooth, even pressure for precise control, reducing waste and mess. Pair with the multi-edge silicone tools for perfect joints and a professional-looking finish every time.
MULTI-SURFACE PERFORMANCE – Suitable for sealing gaps and cracks in wood, plaster, brick, or PVC. This painters caulk white adheres strongly and stays flexible after drying – no cracking or shrinking.
VALUE BUNDLE FOR DIY & PROFESSIONAL USE – A practical caulking kit for decorators, builders, and homeowners. Whether you’re sealing a bathroom, kitchen, or window frame, this decorator’s caulk set makes every job easier and cleaner.

Bond It Decorators Caulk White Set – 2 Pack (380ml Each) with Sealant Gun & Silicone Smoothing Tool Kit | Paintable Interior Flexible Caulking Filler for Gaps & Cracks, Easy to Apply & Smooth Finish

Bond It Decorators Caulk White Set – 2 Pack (380ml Each) with Sealant Gun & Silicone Smoothing Tool Kit | Paintable Interior Flexible Caulking Filler for Gaps & Cracks, Easy to Apply & Smooth Finish

Complete caulking kit included.
Quick-drying for efficient projects.
Strong adhesion on multiple surfaces.

Main Highlights

Complete Caulking Kit – Includes 2 × 380 ml Bond It Decorators Caulk White tubes, a sealant gun, and a silicone smoothing tool set. Ideal for painters, decorators, and DIY users applying white caulk or paintable caulk indoors.
Quick-Drying & Paintable – This interior decorators caulk dries fast and can be over-painted within 1 hour, helping you finish decorating projects efficiently. Perfect for skirting boards, walls, and trim gaps.
Flexible & Easy to Smooth – The flexible caulk formula provides a smooth, crack-resistant finish. Use the included silicone tool set to create recessed or flush joints and neat fillet lines with any mastic sealant.
Precise Application Gun – The economy caulking gun features a hexagonal drive bar for improved control and an anti-drip mechanism, allowing consistent application with caulk tubes, sealants, or adhesives.
Strong Adhesion on Common Surfaces – Bonds to wood, plaster, brick, concrete, plastics, and plasterboard. Ideal decorators caulk white paintable filler for interior use, offering gap-filling and long-lasting flexibility.

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Bond It Decorators Caulk White Set – 2 Pack (380ml Each) with Sealant Gun & Silicone Smoothing Tool Kit | Paintable Interior Flexible Caulking Filler for Gaps & Cracks, Easy to Apply & Smooth Finish

Complete caulking kit included.
Quick-drying for efficient projects.
Strong adhesion on multiple surfaces.

Main Highlights

Complete Caulking Kit – Includes 2 × 380 ml Bond It Decorators Caulk White tubes, a sealant gun, and a silicone smoothing tool set. Ideal for painters, decorators, and DIY users applying white caulk or paintable caulk indoors.
Quick-Drying & Paintable – This interior decorators caulk dries fast and can be over-painted within 1 hour, helping you finish decorating projects efficiently. Perfect for skirting boards, walls, and trim gaps.
Flexible & Easy to Smooth – The flexible caulk formula provides a smooth, crack-resistant finish. Use the included silicone tool set to create recessed or flush joints and neat fillet lines with any mastic sealant.
Precise Application Gun – The economy caulking gun features a hexagonal drive bar for improved control and an anti-drip mechanism, allowing consistent application with caulk tubes, sealants, or adhesives.
Strong Adhesion on Common Surfaces – Bonds to wood, plaster, brick, concrete, plastics, and plasterboard. Ideal decorators caulk white paintable filler for interior use, offering gap-filling and long-lasting flexibility.

Everbuild Power Pro Heavy Duty Applicator Gun | Cartridge Caulks, Sealants, Adhesives - Professional Heavy Duty Applicator, Suitable for High Viscosity Products - 310ml - Black

Everbuild Power Pro Heavy Duty Applicator Gun | Cartridge Caulks, Sealants, Adhesives - Professional Heavy Duty Applicator, Suitable for High Viscosity Products - 310ml - Black

Dripless system prevents mess.
Strong powder coated construction.
Reduced hand fatigue feature.

Main Highlights

High quality, heavy duty skeleton sealant gun for standard cartridges. High performance, fitted with the "Dripless" system.
To enable extrusion of any product from standard cartridges. Suitable for all cartridge applied adhesives, fillers and sealants.
Engineered to be stronger than standard skeleton guns featuring robust powder coated steel construction for heavy duty use.
Finger moulded trigger smoothly drives plunger for continuous flow during application and reduced hand fatigue.
Very high thrust ratio for quick, consistent application using the least effort, and can be used easily for very high-viscosity materials

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Everbuild Power Pro Heavy Duty Applicator Gun | Cartridge Caulks, Sealants, Adhesives - Professional Heavy Duty Applicator, Suitable for High Viscosity Products - 310ml - Black

Dripless system prevents mess.
Strong powder coated construction.
Reduced hand fatigue feature.

Main Highlights

High quality, heavy duty skeleton sealant gun for standard cartridges. High performance, fitted with the "Dripless" system.
To enable extrusion of any product from standard cartridges. Suitable for all cartridge applied adhesives, fillers and sealants.
Engineered to be stronger than standard skeleton guns featuring robust powder coated steel construction for heavy duty use.
Finger moulded trigger smoothly drives plunger for continuous flow during application and reduced hand fatigue.
Very high thrust ratio for quick, consistent application using the least effort, and can be used easily for very high-viscosity materials

Polycell Flexible Gap Polyfilla 290ML (Pack of 2)

Polycell Flexible Gap Polyfilla 290ML (Pack of 2)

Flexible and adaptable to movement.
Durable and crack resistant.
Perfect for skirting and frames.

Main Highlights

The information below applies to each unit in the pack
Flexible filler that flexes with movement
Crack resistant
For gaps along skirting, door and window frames

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Polycell Flexible Gap Polyfilla 290ML (Pack of 2)

Flexible and adaptable to movement.
Durable and crack resistant.
Perfect for skirting and frames.

Main Highlights

The information below applies to each unit in the pack
Flexible filler that flexes with movement
Crack resistant
For gaps along skirting, door and window frames

Polycell EFFGG500 500ml Expanding Foam Filler Gap Gun

Polycell EFFGG500 500ml Expanding Foam Filler Gap Gun

Perfect for DIY tasks.
Expands to fill gaps.
Easy to use.

Main Highlights

Polycell Polyfilla Expanding Foam 500ml

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Polycell EFFGG500 500ml Expanding Foam Filler Gap Gun

Perfect for DIY tasks.
Expands to fill gaps.
Easy to use.

Main Highlights

Polycell Polyfilla Expanding Foam 500ml

Bond It Decorators Caulk White Set – 1 Pack (380ml Each) with Sealant Gun & Silicone Smoothing Tool Kit | Paintable Interior Flexible Caulking Filler for Gaps & Cracks, Easy to Apply & Smooth Finish

Bond It Decorators Caulk White Set – 1 Pack (380ml Each) with Sealant Gun & Silicone Smoothing Tool Kit | Paintable Interior Flexible Caulking Filler for Gaps & Cracks, Easy to Apply & Smooth Finish

Complete kit for all needs.
Quick-drying for efficient projects.
Strong adhesion on various surfaces.

Main Highlights

Complete Caulking Kit – Includes 1 × 380 ml Bond It Decorators Caulk White tubes, a sealant gun, and a silicone smoothing tool set. Ideal for painters, decorators, and DIY users applying white caulk or paintable caulk indoors.
Quick-Drying & Paintable – This interior decorators caulk dries fast and can be over-painted within 1 hour, helping you finish decorating projects efficiently. Perfect for skirting boards, walls, and trim gaps.
Flexible & Easy to Smooth – The flexible caulk formula provides a smooth, crack-resistant finish. Use the included silicone tool set to create recessed or flush joints and neat fillet lines with any mastic sealant.
Precise Application Gun – The economy caulking gun features a hexagonal drive bar for improved control and an anti-drip mechanism, allowing consistent application with caulk tubes, sealants, or adhesives.
Strong Adhesion on Common Surfaces – Bonds to wood, plaster, brick, concrete, plastics, and plasterboard. Ideal decorators caulk white paintable filler for interior use, offering gap-filling and long-lasting flexibility.

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Bond It Decorators Caulk White Set – 1 Pack (380ml Each) with Sealant Gun & Silicone Smoothing Tool Kit | Paintable Interior Flexible Caulking Filler for Gaps & Cracks, Easy to Apply & Smooth Finish

Complete kit for all needs.
Quick-drying for efficient projects.
Strong adhesion on various surfaces.

Main Highlights

Complete Caulking Kit – Includes 1 × 380 ml Bond It Decorators Caulk White tubes, a sealant gun, and a silicone smoothing tool set. Ideal for painters, decorators, and DIY users applying white caulk or paintable caulk indoors.
Quick-Drying & Paintable – This interior decorators caulk dries fast and can be over-painted within 1 hour, helping you finish decorating projects efficiently. Perfect for skirting boards, walls, and trim gaps.
Flexible & Easy to Smooth – The flexible caulk formula provides a smooth, crack-resistant finish. Use the included silicone tool set to create recessed or flush joints and neat fillet lines with any mastic sealant.
Precise Application Gun – The economy caulking gun features a hexagonal drive bar for improved control and an anti-drip mechanism, allowing consistent application with caulk tubes, sealants, or adhesives.
Strong Adhesion on Common Surfaces – Bonds to wood, plaster, brick, concrete, plastics, and plasterboard. Ideal decorators caulk white paintable filler for interior use, offering gap-filling and long-lasting flexibility.

Decorators Caulk – White (Pack of 3 x 300ml) Flexible Filler for Gaps and Cracks | Paintable Sealant for Walls, Ceilings, Skirting Boards & Woodwork

Decorators Caulk – White (Pack of 3 x 300ml) Flexible Filler for Gaps and Cracks | Paintable Sealant for Walls, Ceilings, Skirting Boards & Woodwork

AXpower Inspirational Technology Empowering People

Flexible for various surfaces.
Seamless paintable finish.
Easy and smooth application.

Main Highlights

🏠 Flexible Gap Filler: Perfect for sealing gaps and cracks around skirting boards, ceilings, doors, and windows.
🎨 Paintable Finish: Can be painted over once dry, blending seamlessly with walls or woodwork.
🧩 Smooth Application: Easy to apply with a standard caulking gun for a clean, professional finish.
📦 Value Pack: Includes 3 x 300ml tubes – ideal for multiple DIY or decorating projects.
🧱 Ideal for Indoor Use: Suitable for plaster, wood, masonry, and most building materials.

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AXpower Inspirational Technology Empowering People

Decorators Caulk – White (Pack of 3 x 300ml) Flexible Filler for Gaps and Cracks | Paintable Sealant for Walls, Ceilings, Skirting Boards & Woodwork

Flexible for various surfaces.
Seamless paintable finish.
Easy and smooth application.

Main Highlights

🏠 Flexible Gap Filler: Perfect for sealing gaps and cracks around skirting boards, ceilings, doors, and windows.
🎨 Paintable Finish: Can be painted over once dry, blending seamlessly with walls or woodwork.
🧩 Smooth Application: Easy to apply with a standard caulking gun for a clean, professional finish.
📦 Value Pack: Includes 3 x 300ml tubes – ideal for multiple DIY or decorating projects.
🧱 Ideal for Indoor Use: Suitable for plaster, wood, masonry, and most building materials.

Decorators Caulk – White (Pack of 2 x 300ml) Flexible Filler for Gaps and Cracks | Paintable Sealant for Walls, Ceilings, Skirting Boards & Woodwork

Decorators Caulk – White (Pack of 2 x 300ml) Flexible Filler for Gaps and Cracks | Paintable Sealant for Walls, Ceilings, Skirting Boards & Woodwork

AXpower Inspirational Technology Empowering People

Flexible for any gap sealing.
Seamless after painting application.
Value pack for multiple projects.

Main Highlights

🏠 Flexible Gap Filler: Perfect for sealing gaps and cracks around skirting boards, ceilings, doors, and windows.
🎨 Paintable Finish: Can be painted over once dry, blending seamlessly with walls or woodwork.
🧩 Smooth Application: Easy to apply with a standard caulking gun for a clean, professional finish.
📦 Value Pack: Includes 2 x 300ml tubes – ideal for multiple DIY or decorating projects.
🧱 Ideal for Indoor Use: Suitable for plaster, wood, masonry, and most building materials.

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AXpower Inspirational Technology Empowering People

Decorators Caulk – White (Pack of 2 x 300ml) Flexible Filler for Gaps and Cracks | Paintable Sealant for Walls, Ceilings, Skirting Boards & Woodwork

Flexible for any gap sealing.
Seamless after painting application.
Value pack for multiple projects.

Main Highlights

🏠 Flexible Gap Filler: Perfect for sealing gaps and cracks around skirting boards, ceilings, doors, and windows.
🎨 Paintable Finish: Can be painted over once dry, blending seamlessly with walls or woodwork.
🧩 Smooth Application: Easy to apply with a standard caulking gun for a clean, professional finish.
📦 Value Pack: Includes 2 x 300ml tubes – ideal for multiple DIY or decorating projects.
🧱 Ideal for Indoor Use: Suitable for plaster, wood, masonry, and most building materials.

ProDec 10" Flexible Caulker for Fast, Efficient Application of Fillers and Caulk and Smoothing of Wallpaper

ProDec 10" Flexible Caulker for Fast, Efficient Application of Fillers and Caulk and Smoothing of Wallpaper

Perfect for smooth finishes.
Flexible for various applications.
Comfortable lightweight wooden handle.

Main Highlights

Caulking blade ideal for filling, jointing and creating smooth finishes, especially with plasterboard
Also useful for smoothing lining paper or wallpaper and as a straight edge for cutting
10" (250mm) flexible plastic for effectively pushing filler into cracks and holes
Lightweight wooden handle for comfortable working
Not suitable as a plastering tool or scraper

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ProDec 10" Flexible Caulker for Fast, Efficient Application of Fillers and Caulk and Smoothing of Wallpaper

Perfect for smooth finishes.
Flexible for various applications.
Comfortable lightweight wooden handle.

Main Highlights

Caulking blade ideal for filling, jointing and creating smooth finishes, especially with plasterboard
Also useful for smoothing lining paper or wallpaper and as a straight edge for cutting
10" (250mm) flexible plastic for effectively pushing filler into cracks and holes
Lightweight wooden handle for comfortable working
Not suitable as a plastering tool or scraper

We scanned 581 products

We reviewed these offers relevant to the Polyfilla Flexible Gap Filler Gun within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Swiflee and Co, DCFOWEY, Bond It, Everbuild, POLYCELL, AXpower Inspirational Technology Empowering People, ProDec, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Polyfilla Flexible Gap Filler Gun in the market, we considered we took a deep dive into 2906 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Decorators Caulk White Set - Bundle With Sealant Gun, Silicone Tool Smoothing Set And Soudal White Caulk Gap And Crack Filler Acrylic Silicone Adhesive Sealant. We love many things about this product by Swiflee and Co. What sets it apart from the competition is Complete caulking kit bundle, Durable, flexible white caulk, Suitable for all tasks.
The best value product for most shoppers and where user satisfaction is continuously the highest is Decorator’s Caulk White Kit – 2x Flexible Filler Tubes with Caulking Gun & 4 Multi-Edge Silicone Tool Set – Paintable White Caulk for Sealing, Repairing & Finishing – Ideal for DIY & Trade by DCFOWEY based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Polyfilla Flexible Gap Filler Gun and the best cost-to-value ratio is Everbuild Power Pro Heavy Duty Applicator Gun | Cartridge Caulks, Sealants, Adhesives - Professional Heavy Duty Applicator, Suitable for High Viscosity Products - 310ml - Blackat Everbuild with a 40% discount.
Our list of the best Polyfilla Flexible Gap Filler Gun is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.