  We relate the quantum Steenrod square to Seidel's equivariant pair-of-pants
product for open convex symplectic manifolds that are either monotone or exact,
using an equivariant version of the PSS isomorphism. We proceed similarly for
$\mathbb{Z}/2$-equivariant symplectic cohomology, using an equivariant version
of the continuation and $c^*$-maps. We prove a symplectic Cartan relation,
pointing out the difficulties in stating it. We give a nonvanishing result for
the equivariant pair-of-pants product for some elements of $SH^*(T^* S^n)$. We
finish by calculating the symplectic square for the negative line bundles $M =
\text{Tot}(\mathcal{O}(-1) \rightarrow \mathbb{CP}^m)$, proving an equivariant
version of a result due to Ritter.
