Yes! ReitenRight is compatible with most equestrian sands with or without other additives such as fibre, Nike and crumb rubber. It has proven to be an excellent additive for existing fibre blend footings that have a tendency to pack and be unforgiving, significantly increasing the cushioning and energy return. It has also been successfully used alongside MAG flakes and oiled surfaces. Please feel free contact us with any other inquiries on arena additives.