Sika’s legacy of innovation

By Sika. 

Learn how Sika is continuing to innovate sustainable solutions with their gravel roof resurfacing system. 

Sika’s Roofing and Waterproofing’s team of innovators work hard to create sustainable solutions for construction applications and beyond. Notably, their team has recently launched a high-performance product aimed at streamlining the resurfacing process.  

The problem 

Old asphalt and gravel roofs pose environmental and practical challenges when it’s time for replacement. These traditional systems are inherently inefficient — absorbing heat due to their dark surfaces, which increases cooling costs. Their layered structure makes leaks difficult to detect and repair and the materials themselves are far from eco-friendly. 

Sika’s solution 

Sika offers a smarter alternative. With its Liquid Applied Membranes (LAM), Sika enables building owners to refurbish existing asphalt and gravel roofs without the need for a full tear-off. This innovative solution transforms outdated roofing into a modern, energy-efficient and environmentally responsible system — while maintaining full warranty eligibility. It also minimizes operational disruptions, reduces labor costs and eliminates unnecessary waste. 

The Gravel Roof Resurfacing System is a sustainable, high-performance solution designed to restore aged gravel-surfaced asphalt roofs. It combines solvent-free resins with 100% recycled aggregate to create a seamless, durable surface. 

At the core of the system is Sikalastic®-720 Base, a two-component aromatic urethane blended with proprietary CRM Crumb Rubber. This semi-leveling base fills in surface irregularities, creating a smooth foundation for the top coat. The top layer features a low-VOC Sikalastic® liquid-applied membrane, delivering excellent solar reflectance, ease of application and minimal downtime. The result? A fully warranted, environmentally friendly roof that performs like new — without the cost and disruption of a full replacement. 

Original article and photo source: Sika