Stelmax 1961
£11.28
Ex Tax: £9.40
24 or more £8.04
More from this brand
Stelmax 1961 Gap Filler Sealant - Professional PVC Bonding & Sealing
Heavy-Duty PVC Gap Filler for Window Frames & Construction Applications
Professional-grade gap-filling sealant specifically formulated for the window industry and PVC construction applications. Stelmax 1961 delivers exceptional bonding strength and weather resistance, creating maintenance-free joints that perform like rigid PVC while retaining essential flexibility for thermal movement.
Advanced Formulation:
Higher solid content - formulated for filling significant gaps effectively
PVC resin base - bonds chemically with PVC substrates for superior adhesion
Pigment and plasticiser blend - ensures colour stability and flexibility
Solvent-activated - penetrates surfaces for maximum bond strength
Professional grade - extensively used throughout the window industry
Key Performance Features:
Exceptional bond strength - creates permanent, structural-quality joints
Weather resistance - performs like good quality rigid PVC outdoors
UV stability - maintains properties under constant sun exposure
Chemical resistance - withstands cleaning products and environmental exposure
Flexible seal - accommodates thermal expansion and contraction
Water and gas-tight - creates completely sealed barriers
Primary Applications:
Window frame installation - sealing frames to building surrounds
PVC construction joints - bonding rigid and plasticised PVC components
Structural glazing - professional window and door installations
Building envelope sealing - weather-tight construction joints
Maintenance and repair - filling gaps in existing PVC installations
Stelmax 1961 vs 1965:
1961 (this product) - higher solid content for larger gaps and structural applications
Typical use - sealing between window frames and building surrounds
Gap capacity - handles more significant gaps than 1965
Application - external and structural sealing applications
Technical Advantages:
Porous substrate compatibility - bonds well to masonry, timber, and other materials
Quick application - easy to apply for professional results
Maintenance-free performance - no ongoing maintenance required once cured
Colour options - available in multiple colours beyond standard white
Professional specification - meets demanding construction industry requirements
Industry Applications:
Window and door manufacturing
Glazing contractor installations
Construction and building projects
PVC fabrication and assembly
Maintenance and retrofit projects
Performance Characteristics:
Once fully cured, Stelmax 1961 exhibits the same weathering, UV, and chemical resistance as high-quality rigid PVC, ensuring long-term performance in demanding exterior applications while maintaining the flexibility needed for building movement.
Professional Note:
Due to the variety of substrates and applications in construction, end-users must verify the suitability of products for their specific applications and material compatibility requirements.






