GRP Additives

GRP Additives at MGN Builders Merchants

These specialised products play a crucial role in the success of any glass-reinforced plastic (GRP) application, whether you're undertaking a flat roof installation or carrying out detailed structural repairs. GRP Additives support the curing process, enhance finish quality, and maintain the strength and longevity of your fibreglass systems. Without the correct additives, including resin hardeners and cleaning agents, the final result may not perform to expected standards.

Understanding the Role of the resin hardener

A resin hardener is a vital component in any fibreglass resin application. It’s not just a chemical — it’s what enables the resin to cure properly, turning it from a liquid into a solid, durable finish. The amount of resin hardener used in relation to the resin is crucial. Too little, and the curing process may be incomplete; too much, and it may lead to brittleness or an unstable finish. That's why it’s important to follow exact ratios, often depending on the temperature and the size of the project. This balance ensures that the resin sets correctly, resulting in a robust, weather-resistant surface.

What Makes a grp hardener Essential

A grp hardener, also known as a catalyst, activates the resin's chemical reaction during roofing applications. Its main purpose is to ensure the fibreglass resin cures evenly and thoroughly across all surfaces. This contributes to a consistent, bubble-free finish that can withstand the elements for many years. Commonly used in conjunction with polyester resins, grp hardeners are essential for:

• Creating a solid bond between layers of fibreglass

• Reducing the risk of patchy or uneven curing

• Ensuring long-term performance of GRP roofing systems

Cleaning and Finishing with GRP Additives

Among the range of GRP Additives available, cleaning solvents like acetone cleaner play a key role before and after application. Acetone is commonly used to clean brushes, rollers, and tools immediately after use, preventing resin build-up and ensuring they’re ready for the next job. It also serves as a surface cleaner prior to resin application, removing oils, dust, and contaminants that could compromise adhesion. Our product range includes high-quality resin hardeners, reliable grp hardeners, and trusted acetone-based cleaners, helping professionals and DIYers alike achieve clean, strong, and lasting results.