Resin swords are generally not heavy, especially when compared to their metal counterparts. Resin, a type of plastic used in crafting and model-making, is known for its lightweight and durable properties. These swords are favored for cosplay and decorative purposes rather than combat due to their lack of heft and inability to hold a sharp edge. The weight can vary depending on the size and design, but on average, resin swords are much easier to handle and carry around. Their lightweight nature makes them ideal for extended periods of holding or displaying, reducing the strain on the arms and shoulders. However, for those seeking a more authentic, weighty feel, resin swords may not fulfill that criterion.

Polypropylene is favored for its unique blend of properties, making it a versatile material across various industries. Its key features include its lightweight nature, resistance to chemicals, water, and electricity, which significantly enhance its durability. Polypropylene is also highly appreciated for its flexibility, which can be adjusted to suit different applications by modifying its manufacturing process. This plastic's recyclability stands out, aligning with the growing demand for sustainable material solutions. Its ability to withstand high temperatures further broadens its usability, from healthcare and automotive components to packaging and textiles. Consequently, polypropylene's blend of recyclability, durability, and adaptability to various manufacturing requirements positions it as a preferred choice for many sectors looking to balance performance with environmental considerations.

Epoxy resin, in its cured state, is not inherently fire-resistant but can withstand mild heat. Its resistance to heat generally depends on the formulation, with some types being more resistant due to added fire retardants. Under high temperatures, epoxy can soften, degrade, or even ignite. Manufacturers often modify epoxy resins with fire retardant additives to improve their fire resistance for applications requiring higher safety standards. However, even with these modifications, it's crucial to understand that while they may slow down the spread of fire or delay ignition, they do not render the epoxy completely fireproof. For applications where fire resistance is a critical requirement, it is essential to select an epoxy specifically designed with enhanced fire-resistant properties or consider alternative materials that inherently possess higher fire resistance.