Rockwool RockLap 25mm Pipe Insulation 42mm OD

Rockwool RockLap Pipe Insulation with 25mm thickness and 42mm outer diameter provides pre-formed stone wool sections engineered for straightforward installation. Each section arrives pre-slit with factory-applied foil facing and self-adhesive lap, enabling rapid application directly onto pipework and sealing with backing tape.

These stone wool insulation sections excel at protecting heating and ventilation pipes across residential, commercial, and industrial applications. With over 60 years of proven performance, they deliver outstanding thermal insulation across varying climates and exposure scenarios.

Product specification

• Model: 25mm RockLap
• Thickness: 25mm
• Outer diameter: 42mm
• Length: 1000mm
• Density: 120kg/m3
• Thermal Conductivity: 0.033W/mK
• R-Value: 0.76m2K/W
• Pack quantity: 1
• Fire Rating (Reaction to Fire): A2L-s1, d0
• Resistance to fire: Tested to BS EN 1366-3 to provide up to 120 minutes fire resistance
• Brand: Rockwool

Cylindrical stone wool segments arrive pre-slit for hassle-free fitting, complete with foil facing and integral self-adhesive lap for superior performance.

Key features include

• Non-combustible construction with Euroclass A2L-s1, d0 rating
• Reinforced aluminium foil facing delivering a vapour-resistant barrier
• Self-adhesive foil lap enabling quick installation whilst reducing reliance on additional aluminium tape
• Tested to EN 1366-3 standards for fire resistance of penetration seals, delivering up to EI 120 protection

Applications

Ideal for pipework operating between 0°C and 200°C, these sections are specifically tested for fire stopping where steel and copper pipes pass through fire-resistant walls and floors. This certification means the insulation runs continuously through separating elements, eliminating costly local removal or replacement work.

Fire performance

• Euroclass A2L -s1,d0. • Tested to EN 1366-3, the harmonised European standard for the fire resistance of penetration seals. • Provide up to 120 minutes* fire resistance integrity and insulation.

Water Resistance

Rockwool RockLap sections feature water-repellent properties. When deployed or stored outdoors, protect the insulation with a waterproof covering. For cold pipe insulation applications, seal joints with foil tape to prevent condensation buildup.

Service Temperature

This 25mm Rockwool pipe insulation suits pipes operating between 0°C and 250°C. To preserve foil facing bond strength, select insulation thickness ensuring outer surface temperature remains below 80°C.

Durability

Rockwool stone wool insulation delivers exceptional resilience, durability, and dimensional stability, preserving thickness and shape indefinitely. Testing confirms Rockwool insulation maintains its insulating properties and performance characteristics for over 65 years post-installation.

More Information on 25mm Rockwool RockLap Pipe Insulation ( 42mm Outer diameter )

• Manufaturer Link: 25mm Rockwool Rocklap
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