Earthing Compound B1

B1 - is a mix of bentonite and gypsum produced as per AS2239.

B1 (for general use) Bentonite …………50% by mass Gypsum ………………………50% by mass Very little swelling (25%) occurs when wetted from dry state, and minor shrinkage occurs during drying from wet state; causing the formation of a minimal number of voids and small cracks. The resistivity of B1 when wet is relatively high – typically 3-6 Ω.m, and it has good water retention.