Stelmax 1961 Gap Filler & Sealant – High‑Strength PVC Filler for Larger Gaps (300ml)

Stelmax 1961 Gap Filler & Sealant (300ml) is a professional‑grade, high‑solid PVC filler designed for creating exceptionally strong, maintenance‑free joints on rigid and plasticised PVC. Formulated with PVC resin, pigments and plasticisers, it delivers outstanding adhesion and is widely trusted across the window and building industries for frame installation, sealing and attachment work.

Thanks to its high solid content, Stelmax 1961 is ideal for filling larger gaps where a durable, long‑lasting finish is essential. Once cured, it forms a tough, water‑resistant, UV‑stable seal that closely resembles high‑quality rigid PVC. It also adheres effectively to many porous substrates, making it a versatile choice for both installation and repair tasks.

Available in White and Mahogany, with RAL colour matching available on request, Stelmax 1961 offers a clean, colour‑matched finish for a wide range of PVC profiles and trims. The 300ml tube fits any standard sealant gun for quick, easy application.

Features

• High‑solid PVC resin formula for filling larger gaps
• Creates strong, maintenance‑free joints on rigid and plasticised PVC
• Excellent adhesion to PVC and many porous substrates
• Weather‑resistant, UV‑stable and chemical‑resistant once cured
• Rapid skin formation protects against dust and debris
• 300ml tube fits any standard sealant gun
• Available in White and Mahogany
• RAL colour matching available on request
• Safe, compliant courier‑only delivery

Benefits

• Achieve durable, long‑lasting seals with minimal effort
• Ideal for window frame installation, sealing and attachment work
• Fills larger gaps more effectively than Stelmax 1965
• Ensures a clean, colour‑matched finish on PVC profiles
• Reduces rework thanks to strong adhesion and fast skinning
• Suitable for both trade professionals and DIY users

Specifications

• Product Type: PVC gap filler & sealant
• Size: 300ml
• Colours Available: White, Mahogany
• Material Compatibility: Rigid PVC, plasticised PVC, porous substrates
• Application: Large gap filling, window frames, trims, joints
• Delivery: Courier only (flammable product)
• Colour Matching: RAL options available on request